Re: Getting bound object
On 13 Jul 2014, at 21:10, Kyle Sluder k...@ksluder.com wrote: On Jul 13, 2014, at 11:24 AM, Daniel Santos daniel.d...@gmail.com wrote: Hello, I have a collection view in which I have subclassed the collection view item. In the awake from nib method I want to get the represented object but it is returning nil How can I get the bound object ? You have to wait until after -awakeFromNib. Bindings aren't hooked up and propagated until the entire object graph has been awoken. One option is to override -loadView to call super and then do your magic. --Kyle Sluder I just tried that. But [self representedObject] returns nil when called in the subclassed NSCollectionViewItem. Any idea why ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Setting a tag on NSProgressIndicator
Hello all, I have the item prototype of a NSCollectionView. This prototype in declared in a NIB file along with its view. Now I want to display an image in this view, but while it is loading I want to display a circular progress indicator instead of the loaded image. I have subclassed NSView and made it the view of the item prototype, so I can trigger the image loading and the replacement of the progress indicator with the image well. In order for the progress indicator to start animating I have to call its startAnimation message. But I can’t have an outlet from the progress indicator to the item view because the NSCollectionView creates new objects for its items. So the only way I can access the subviews, is to programatically get the subviews. For easing that process I would like to set a tag on the progress indicator, but Interface builder doesn’t let me. The option appears disabled. How can I get the progress indicator object, or any object inside the superview ? Thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: IKImageBrowserCell
I have been looking at NSCollectionView, and the ability to lazy load its elements. Some folks suggest using core data as the data source of an NSArrayController, that is connected to the NSCollectionView. But, does the collection view loads its items only when they become visible ? From what I have gathered the array controller will have all the elements loaded from core data, where some of them will be faults. How do these faults become the collection’s objects ? On 10 Jun 2014, at 16:20, SevenBits sevenbitst...@gmail.com wrote: On Tuesday, June 10, 2014, Daniel Santos daniel.d...@gmail.com wrote: Absolutely. What do you have in mind ? Look in the documentation. Specifically, NSCollectionView allows you to do exactly what you describe; define a view, with a number of sub views, with one being the image and another your button, and set them up as collection view objects. I have done this and it works well. -- SevenBits On Monday, June 9, 2014, SevenBits sevenbitst...@gmail.com wrote: On Monday, June 9, 2014, Daniel Luis dos Santos daniel.d...@gmail.com wrote: Hello all, I have a IKImageBrowserView that I want to customise. I want to add a button to each IKImageBrowser|Cell that when pushed does some action. How can I do that ? Is using NSCollectionView an option? Thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/sevenbitstech%40gmail.com This email sent to sevenbitst...@gmail.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
IKImageBrowserCell
Hello all, I have a IKImageBrowserView that I want to customise. I want to add a button to each IKImageBrowser|Cell that when pushed does some action. How can I do that ? Thanks ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
error details in a NSAlert
Hello all, I want to display some text indicating a list of errors the user should correct before submitting data. I am using a modal NSAlert in which i set a message with a localised string from a table. I want to include the error details and for that I was setting the informativeText field but it doesn’t show up unless its a string literal. I need it to be a variable value. I also tried setting an accessory view but nothing is showed. The code that uses the accessory view is below. NSTextView *accessory = [[NSTextView alloc] initWithFrame:NSMakeRect(0,0,200,15)]; NSFont *font = [NSFont systemFontOfSize:[NSFont systemFontSize]]; NSDictionary *textAttributes = [NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName]; [accessory insertText: informativeText]; [accessory setEditable:NO]; [accessory setDrawsBackground:NO]; NSAlert* errorAlert = [NSAlert alertWithMessageText:NSLocalizedStringFromTable(@The user data is not valid. Correct it and try again, @AccountInfoTab, @The user data is not valid. Correct it and try again) defaultButton:nil alternateButton:nil otherButton:nil informativeTextWithFormat: @]; [errorAlert setAccessoryView: accessory]; [errorAlert runModal]; InformativeText is an NSMutableString. What I am trying to do is even possible, or am I doing anything wrong ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: error details in a NSAlert
Sorry, my mistake String was empty. Conditional that populated it failed. On 06 Apr 2014, at 16:18, Scott Ribe scott_r...@elevated-dev.com wrote: On Apr 5, 2014, at 7:19 PM, Daniel Luis dos Santos daniel.d...@gmail.com wrote: I want to include the error details and for that I was setting the informativeText field but it doesn’t show up unless its a string literal. That's simply not true, so you're not setting up your string variable correctly. Maybe it doesn't have the value you think, or maybe it's over-released and the value is gone before it can be drawn. -- Scott Ribe scott_r...@elevated-dev.com http://www.elevated-dev.com/ (303) 722-0567 voice ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
error details in a NSAlert
Hello all, I want to display some text indicating a list of errors the user should correct before submitting data. I am using a modal NSAlert in which i set a message with a localised string from a table. I want to include the error details and for that I was setting the informativeText field but it doesn’t show up unless its a string literal. I need it to be a variable value. I also tried setting an accessory view but nothing is showed. The code that uses the accessory view is below. NSTextView *accessory = [[NSTextView alloc] initWithFrame:NSMakeRect(0,0,200,15)]; NSFont *font = [NSFont systemFontOfSize:[NSFont systemFontSize]]; NSDictionary *textAttributes = [NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName]; [accessory insertText: informativeText]; [accessory setEditable:NO]; [accessory setDrawsBackground:NO]; NSAlert* errorAlert = [NSAlert alertWithMessageText:NSLocalizedStringFromTable(@The user data is not valid. Correct it and try again, @AccountInfoTab, @The user data is not valid. Correct it and try again) defaultButton:nil alternateButton:nil otherButton:nil informativeTextWithFormat: @]; [errorAlert setAccessoryView: accessory]; [errorAlert runModal]; InformativeText is an NSMutableString. What I am trying to do is even possible, or am I doing anything wrong ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Cocoa custom text field backspace handling
I am developing a custom textfield in Cocoa. To handle the backspace character
I should be defining :
- (void) keyUp: (NSEvent*)theEvent {
[self interpretKeyEvents: [NSArray arrayWithObject: theEvent];
NSString *text = [theEvent charactersIgnoringModifiers];
[[self text] appendString: text];
}
Then implement :
- (void) deleteBackward:(id)sender {
if ([[self text] length] == 0)
return;
NSString* textMinusLastCharacter = [[self text] substringToIndex: [[self
text] length] - 1];
[self setText: [NSMutableString stringWithString: textMinusLastCharacter]];
[self setNeedsDisplay:YES];
}
When I run the application, for every alphanumeric character key I press I hear
a sound. When I press the backspace key, a call is made to the deleteBackward:
and after that the key up method appends the backspace char to the end of the
string. How do I filter the backspace key press in a device independent manner
(without key codes).
Seems like the event is being passed to someplace else up in the responder
chain. How do I control that? I am avoiding comparing keyCodes that come
through the event object. I want to remove the sound played when each character
is pressed.
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
Running an NSApplication from a test case
Hello all,
I have a test case where I would like to launch a UI. I have a NIB with a
window that I load through code in the test case. Here goes the code :
- (void)testExample
{
NSArray* topLevelWidgets = nil;
NSBundle* theBundle = [NSBundle bundleForClass:[self class]];
[NSApplication sharedApplication];
Boolean nibLoaded = [theBundle loadNibNamed: @TestSetOne owner:
[NSApplication sharedApplication] topLevelObjects: topLevelWidgets];
if (!nibLoaded)
XCTFail(@NIB file was not loaded);
[[NSApplication sharedApplication] runModalForWindow:[topLevelWidgets
objectAtIndex:2]];
}
Problem is that the last line does not cause the window in the NIB to appear.
If I run the code through the debugger I can see the NSWindow instance that I
am passing to the “runModalForWindow”.
What am I doing wrong ?
Regards
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
Re-using the same NIB on two owners
Hello, I have an application that has two windows. Each window is associated to a controller class. On one method of each class I load another NIB that has a subordinate window. That subordinate NIB has outlets and actions that should be associated to the loading class, so on the NIB I set the File's Owner to be of the class that loads it. My problem is that I need to load the same NIB from two different classes, so the owner is different according to which class I load it from. Is there another way to do it without the file's owner ? Subclassing the controller ? Thanks for replying___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Menu item enabling
Hello, I have a submenu of the File menu that gets loaded with menu items on awakeFromNib(). Problem is that the method that does the menu item enabling is not being called on the submenu's items and so they are not enabled. I implemented the validateUserInterfaceItem() method in a class and have set the target of the created menu items to that class. It gets called for every menu item except the one with the submenu. If I expand the submenu it doesn't get called. What am I missing ? Regards Daniel ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Menu item enabling
Hello, I thought that by implementing the validation method it wouldn't matter if the menu item has an action set on it. That was the problem. Once I set the action, the validation method started being called. Thanks, Daniel On Jun 23, 2011, at 5:42 PM, Nick Zitzmann wrote: On Jun 23, 2011, at 10:17 AM, Daniel Luis dos Santos wrote: Hello, I have a submenu of the File menu that gets loaded with menu items on awakeFromNib(). Problem is that the method that does the menu item enabling is not being called on the submenu's items and so they are not enabled. I implemented the validateUserInterfaceItem() method in a class and have set the target of the created menu items to that class. It gets called for every menu item except the one with the submenu. If I expand the submenu it doesn't get called. What am I missing ? That message will be sent to the menu item's target if it implements -validateMenuItem: or -validateUserInterfaceItem: (to be pedantic, they are methods and not functions). Are you sure the target action of the menu items are being set correctly? If the action wasn't set, then they won't be enabled. If the target wasn't set, and nothing in the responder chain implements the action, then they won't be enabled. If the target action were set, then they should be enabled by default, but maybe the target implemented one of those methods and returned NO, which would explain why they're off. Also, did you ensure -autoenablesItems is turned on in the submenu? It should be by default... Nick Zitzmann http://www.chronosnet.com/ ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Storing bundle loaded main class instances in NSArray
Summarizing the behaviour I see here If I add an object (which is the principal class of a bundle) to an NSMutableArray, later in the program I get the exception that the NSFileManager default manager object does not respond to a known message selector. I further narrowed it down to a fread call (standard libc) that I do just before the exception is thrown. If I comment the fread the error appears at another point in the code when I am initializing a NSDictionary with dictionaryWithDictionary. That other error shows itself in the gdb log as a pointer modified after being freed. Since this error is a bit difficult to track and explain through emails, I appreciate all your help, and think I will try to debug some more (change the code to some other way of doing it). Thanks anyway On Apr 9, 2009, at 1:38 AM, Graham Cox wrote: On 09/04/2009, at 2:13 AM, Daniel Luis dos Santos wrote: I expect a file manager and it tells me that it does not respond to fileExistsAtPath No you don't. According to your original post, you are complaining that calling - addObject on _instances throws this error. So does _instances point to NSFileManager or an array, as the code implies? You're confused, so the rest of us have no chance. Regarding your comments about autorelease pools, sounds like you're relying on some assumed behaviour that is not stated anywhere in any documentation. Don't do that, you're just creating problems that don't need to be there. What about the autorelease pools created around the main event loop for example? --Graham ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Fwd: Storing bundle loaded main class instances in NSArray
Sorry. Sent the original to another list
Begin forwarded message:
From: Daniel Luis dos Santos daniel.d...@gmail.com
Date: April 8, 2009 1:02:18 PM GMT+01:00
To: Graham Cox graham@bigpond.com
Cc: list Xcode-users xcode-us...@lists.apple.com
Subject: Re: Storing bundle loaded main class instances in NSArray
Ok, here goes,
This is were I load the bundle :
NSString *bundlePath = (NSString*)[_configuration objectForKey:
DRIVERBUNDLE_PATH];
NSBundle *bundle = [NSBundle bundleWithPath: bundlePath];
if (nil == bundle) {
[errorLog addObject: [NSNumber numberWithInt:
DRIVER_ERRORCODE_BUNDLEMISSINGATPATH]];
*logList = [NSArray arrayWithArray: errorLog];
return nil;
}
Class driverClass = [bundle principalClass];
if ((nil == driverClass) ||
![driverClass conformsToProtocol:
@protocol(StorageDriverInterface)]) {
[errorLog addObject: [NSNumber numberWithInt:
DRIVER_ERRORCODE_BUNDLEMAINCLASSNOTCOMPLIANT]];
*logList = [NSArray arrayWithArray: errorLog];
return nil;
}
_bundle = bundle;
fine until there, then later in the same method inside a loop where
I initialize several instances of the principal class:
id StorageDriverInterface aDriverInstance = [[driverClass alloc]
init: driverConfig callingbackto: callback logTo:
interfaceInitLogList];
That instantiates the object whose class was loaded. Then in the
same loop afterwards I want to add the previous id to an NSArray
id saID = [_parametersOfLatestInitializedSA objectForKey:
CONFIG_SAID];
if ((nil != saID) ([[saID class] isSubclassOfClass: [NSData
class]])) {
//[_instances addObject: aDriverInstance];
[_instanceIDs addObject: saID];
[mutableInstanceDict setObject: saID forKey: CONFIG_SAID];
} else {
if (!errorOcurred) {
[errorLog addObject: [NSNumber numberWithInt: index]];
errorOcurred = YES;
}
[errorLog addObject: [NSNumber numberWithInt:
DRIVER_ERRORCODE_INSTANCEDIDNOTREPORTID]];
}
When I uncomment the addObject line above, later in the code
NSFileManager throws a doesNotRespondToSelector exception, which is
very odd.
On Apr 8, 2009, at 1:31 AM, Graham Cox wrote:
On 08/04/2009, at 10:23 AM, Daniel Luis dos Santos wrote:
The only thing I can think of, to see something like this is that
I am probably overwriting the NSFileManager's class internal
tables and therefore the message. When I comment out the
assignment it all goes well.
The class that I instantiate from the bundle is handled through a
protocol. The implementation is derived from an NSObject. I have
considered using an NSPointerArray instead.
Show your code.
This word description is not very enlightening to anyone except
you, who are familiar with the code.
Sounds like it could be an over-release problem, but without seeing
the code, who knows?
--Graham
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
Re: Storing bundle loaded main class instances in NSArray
Since I am using an auto release pool that is created before anything
else, those initializers create auto released objects that will only
be released at the end of the code execution. They will be valid until
the program terminates
On Apr 8, 2009, at 3:01 PM, Steve Christensen wrote:
If your _instances variable is initialized using either
[NSMutableArray array] or [NSMutableArray arrayWithCapacity:...], it
will be autoreleased and become invalid. You can fix that by doing
something like [NSMutableArray array] retain] or using
[NSMutableArray alloc] initWithCapacity:...].
When an object is released, the underlying memory is reclaimed but
any variables that were referencing the object are unmodified so
they now point to garbage.
And as for zombies, Google is your friend. The first hit for
NSZombieEnabled gives a good description.
On Apr 8, 2009, at 6:15 AM, Daniel Luis dos Santos wrote:
The _instances mutable array is instantiated in the default init
method that is called on all other init methods. It is never
released. I am using an Auto release pool. The log writes ;
2009-04-08 13:56:53.189 TestRunner[2568:813] *** -[NSFileManager
fileExistsAtPath:]: unrecognized selector sent to instance 0x1126f0
When releasing a pointer does its value change ? or it just
releases the memory ?
What is that zombie thing you're talking about ?
On Apr 8, 2009, at 1:53 PM, Graham Cox wrote:
On 08/04/2009, at 10:33 PM, Daniel Luis dos Santos wrote:
if ((nil != saID) ([[saID class] isSubclassOfClass: [NSData
class]])) {
//[_instances addObject: aDriverInstance];
When I uncomment the addObject line above, later in the code
NSFileManager throws a doesNotRespondToSelector exception, which
is very odd.
Still not enough to go on.
Where is _instances initialised? Is it released anywhere? What
does the exception log? Is it possible _instances could be being
released leaving a stale pointer that points to NSFileManager?
Have you run it with NSZombieEnabled turned on? Any difference?
Please post the *relevant* code.
--Graham
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
Re: Storing bundle loaded main class instances in NSArray
If its outer and the code is done right, it should be disposed of when the code within it is no longer needed On Apr 8, 2009, at 3:46 PM, glenn andreas wrote: On Apr 8, 2009, at 9:34 AM, Daniel Luis dos Santos wrote: Since I am using an auto release pool that is created before anything else, those initializers create auto released objects that will only be released at the end of the code execution. They will be valid until the program terminates That's not what the memory management rules tell you to do. How do you know that there isn't an auto-release pool outside of that which gets cleaned up (and nested auto release pools are automatically cleaned up when the outer one is)? Glenn Andreas gandr...@gandreas.com http://www.gandreas.com/ wicked fun! Mad, Bad, and Dangerous to Know ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Storing bundle loaded main class instances in NSArray
I just discovered that if I don't load the code through a bundle and link it directly to the executable the error goes away. From the bundle loading code I posted at the beginning of this thread, am I doing anything wrong ? On Apr 8, 2009, at 4:34 PM, Bill Bumgarner wrote: On Apr 8, 2009, at 7:55 AM, Daniel Luis dos Santos wrote: If its outer and the code is done right, it should be disposed of when the code within it is no longer needed That still isn't correct according to the Cocoa memory management guidelines. Thus, the general conclusion will be that something is over-released and something else subsequently receives messages destined for the over-released object. A terribly common error, actually -- quite typical. And this statement: When I uncomment the addObject line above, later in the code NSFileManager throws a doesNotRespondToSelector exception, which is very odd. Backs up that assessment. So... fix your memory management to be in line with the guidelines *then* try and debug the problem. Of course, fixing the memory management might just make the problem go away entirely. Since this appears to be relatively new code, one possible fix would be to simply turn on GC. If it is a command line tool -- or a daemon -- read the docs on how to start the collector thread. b.bum ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: Storing bundle loaded main class instances in NSArray
I expect a file manager and it tells me that it does not respond to fileExistsAtPath On Apr 8, 2009, at 5:05 PM, Bill Bumgarner wrote: On Apr 8, 2009, at 8:48 AM, Daniel Luis dos Santos wrote: I just discovered that if I don't load the code through a bundle and link it directly to the executable the error goes away. From the bundle loading code I posted at the beginning of this thread, am I doing anything wrong ? Doesn't look like it, but I'd focus -- instead -- on the original bug. Run with Zombies enabled. Figure out why you end up with a File Manager reference where you expect an array reference. b.bum ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Storing bundle loaded main class instances in NSArray
Hello, I have some code that loads a bundle like : [NSBundle bundleForPath: path] Then I get its main class. Then I cycle through some parameters that initialize that loaded main class and stores each new instance in a NSMutableArray. Problem is that when I do the assignment to the array that causes the code later to behave unstable and failing with a message like : 2009-04-08 01:03:48.357 TestRunner[9643:813] *** -[NSFileManager fileExistsAtPath:]: unrecognized selector sent to instance 0x1126f0 The only thing I can think of, to see something like this is that I am probably overwriting the NSFileManager's class internal tables and therefore the message. When I comment out the assignment it all goes well. The class that I instantiate from the bundle is handled through a protocol. The implementation is derived from an NSObject. I have considered using an NSPointerArray instead. Help! ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
memory deallocation
Hello, From what I know so far, memory allocated using the malloc() family of functions is freed using the free() function. Literal values such as : char *aString = some text; are automatic values and are deallocated by the compiler automatically. When I free some pointer that was allocated as in the example declaration above I get a warning that a non page-aligned, non allocated pointer is being freed. Then in practical terms, what does a literal value such as a #define that is used to initialize pointers such as the one above serves for ? If for example I have a group of string #defines that are used in log messages, that means that I will have to malloc space for them the sprintf them to it, so I can be sure that I don't get that warning when deallocating the log messages. when you pass as pointer to bytes (like a void*) to cocoa (for example NSData), what does it do ? It copies the bytes or just copies the pointer ? If I pass aString to it that means that at the end of the scope it will be deallocated, and NSData will have a dangling pointer ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Memory allocation pattern related question
Hello,
I have a shared library and some client code. In the shared library I
am adopting the following method signature pattern :
- (int) someMethod: (aType*)someInParam anotherParam:
(aType**)someOutParam;
I use the return value to indicate success or failure in the execution
of the method, and the arguments to pass parameters in and out.
The out parameters are double pointers.
Also, the pattern I am using mandates that the out parameters
dereferenced values are allocated within the method. So :
- (int) someMethod: (aType*)someInParam anotherParam:
(aType**)someOutParam {
*aType = [[aType alloc] init];
return 0;
}
would do some logic and allocate the return value and set it to the
double pointer, that would be the visible on the calling scope.
My problem is that I am not really sure of the way Cocoa retains and
releases objects.
Using a global auto release-pool, when is the out param object
released ? At the end of the scope of someMethod ? or when I
explicitly release it ?
If the former, I have to retain it withing some method so that when
its scope finishes the ref count doesn't go to zero right ?
Since the idea is to continue using the return type throughout the
enclosing method call's scope how do I implement this safely so that I
don't end up trying to access release memory ?
Thanks
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to arch...@mail-archive.com
NSTimer EXC_BAD_ACCESS
Hello, I have a NSTimer that is created every time I press a button. It then calls the update function successively until some amount of time passes. When I press the button again I get a EXC_BAD_ACCESS on the timer's initialization : NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval: step target: self selector: @selector(_updateDisplay:) userInfo: nil repeats: YES]; step is a double, and _updateDisplay has the right signature. The stack trace is something like : #0 0x90705558 in tiny_malloc_from_free_list #1 0x906fe3ed in szone_malloc #2 0x906fe2f8 in malloc_zone_malloc #3 0x932b9451 in _CFRuntimeCreateInstance #4 0x9327f844 in CFDateCreate #5 0x93329f63 in -[__NSPlaceholderDate initWithTimeIntervalSinceReferenceDate:] #6 0x9332a7fd in +[NSDate dateWithTimeIntervalSinceNow:] #7 0x9034aa3f in +[NSTimer(NSTimer) scheduledTimerWithTimeInterval:target:selector:userInfo:repeats:] I haven't any idea,... ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Symbol not found error
Hello, I am getting this error over and over again, whenever I do a new target in some place and then try to use it somewhere else. I have a dynamic library in a project that is used in another project. Then I added another dynamic library to the first one which is also used by the second project. The first lib links and the last won't link. The symbols are not found. From the gcc command line the -L option is the same because the dylib is in the same directory, a new -llibname flag is added for the new dylib (I dragged the lib file from the finder to the xcode tree). When I do an nm on the lib file, the symbols are there. I changed the install name to have the rpath, but is only relevant at run-time, right? Can't find out why this happens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Time measurement
Hello, Not sure I should ask this here. How do I get time measurements in milliseconds? What is the accuracy of the mac's C library implementation ? I am using the clock() function from time.h and measuring differences in seconds between the trigering of a NSTimer. The NSTimer fires every 0.1 secs, and in the event code I measure the difference between the current clock() call and the previous. I then divide it by the CLOCKS_PER_SEC constant and get two orders of magnitude difference than the interval in the timer. I get 0.001 secs instead of the 0.1 of the NSTimer. Any ideias ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: NSTimer issue
You already answered your own question. If you see two different values for 'self' for two objects of your view subclass then of course there are two instances. The NIB file has a window taken from the pallete, where I have dropped a button and a generic NSView both from the pallete. On the NSView's properties I have changed the class name from NSView to a class in my Xcode project. I also have an NSObject item taken from the pallete which represents the same object implementing the view. This situation usually comes about when a view is created in code, and a view of the same class is also added to a NIB file. Note that, because the view you're actually controlling via the timer (presumably the one created in code) doesn't draw, it probably hasn't been added to a superview either. It sounds like you accidentally created a new view instead of getting a reference to the one in the NIB file using an IBOutlet. Now it is obvious that the view in the window and the object in the xib are not the same. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
NSTimer issue
Hello, I have an NSView derived class where I have to do some drawing inside NSRect. When pressing a start button, a timer is created with : + (NSTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds target:(id)targetselector:(SEL)aSelector userInfo:(id)userInfo repeats: (BOOL)repeats In the target argument I pass self, and as selector a method of the class in question. When update is called, the self object has the address I passed when creating the timer. Inside the method I call setNeedsDisplay: so the drawRect method is called in the event loop. That call never happens and only when I force the redrawing of the view through dragging or overlapping windows, the drawRect is called but with a different address on self. I don't understand what is happening. Are there two instances ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Path handling routines
Hello, Are there in the Foundation framework (or anywhere else on the Cocoa platform) path handling routines (directory extraction, path decomposition) ? Cheers ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
sizeof(unsigned long long)
Hello, I have a piece of C code that generates an unsigned long long from an sequence of unsigned char's. When I do sizeof(unsigned long long) i get 8. Afterwards I try to shift each unsigned char into its position along the destination unsigned long long variable, but I get a warning from the compiler that I am shifting beyond the type's capacity. That is not surprising since I am targeting 32 bit. Then I don't understand why the size of returns 8. Shouldn't it return 4 ? I'm running Xcode 3.0 on Leopard. ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
How to call functions of a C dylib on a C++ dylib
I am having trouble getting it to compile. From what I understand there must be an extern C before the inclusion of the C lib's header files. I still get a link error. Is there anything else to it ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: How to call functions of a C dylib on a C++ dylib
Sorry, I forgot to say that I was already doing that. And it does build, my problem is in the link stage. On Sep 18, 2008, at 3:00 PM, Negm-Awad Amin wrote: Am Do,18.09.2008 um 15:55 schrieb Daniel Luis dos Santos: I am having trouble getting it to compile. From what I understand there must be an extern C before the inclusion of the C lib's header files. I still get a link error. Is there anything else to it ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/negm-awad%40cocoading.de This email sent to [EMAIL PROTECTED] You have to include the headers for your source code (compiling) and the lib itself for linking. Cheers Amin Negm-Awad [EMAIL PROTECTED] ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Re: Mixing ObjC and C++ STL on same ObjC source file
On Sep 12, 2008, at 11:21 AM, Daniel Luis dos Santos wrote: The problem was that in CVDisplayPipeline.h I was declaring the map as a return type of a method, but without specifying the template types (caused by my relative ignorance of C++). Now I have another problem, which I wonder if you could help : On one project I have a target that builds a shared library target in C++ exclusively. On another target I have a objC app that uses the first as a project dependency. When I call a method on the library with a pointer to a STL map (std::mapstd::string, std::string) as an argument, the linker complains it can't find it. I made a test method on the lib that takes only a std::string and it works. Passing a std::mapint, int fails with the same error. Other methods in the lib that don't use STL are found by the linker. Don't know what is happening, or if there is any limitation because of STL. I looked up the documentation from apple on using the C++ runtime, and learned that in practice it is not to be assumed that two C++ runtime versions even on the same OS maintain compatibility. Then one should not put STL on library boundaries because of portability between libstdc++ implementations. That said, STL can be used only within a library's own code. Then when coding a shared library one must implement all kinds of data structures that can be used at the boundary. Isn't that like reinventing the wheel ? Having to implement those data structures is a lot of work (at least for who's beginning to write C code). Having to do a map implementation or a linked list is almost like starting from scratch. Is there any implementation of those standardized in the C world (that is only C and portable) ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Mixing ObjC and C++ STL on same ObjC source file
Hello ! I have an objective C class and want to call a method on a class in C+ +. As argument to the C++ class is a map instance of the STL. The ObjC class definition is on a file with a mm extension. I have std::map *var as a member variable of the ObjC class. When I compile the code there is an error saying : /Users/dlsa/code/Finema/trunk/LiquidSurfaces/src/CVDisplayPipeline.h: 20: error: using-declaration for non-member at class scope How do I do this ? ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
Autorelease question
Hello,
I have the following code :
if (![fileMgr fileExistsAtPath: indexFilePath]) {
NSMutableDictionary *index = [[NSMutableDictionary alloc] init];
[index setObject: [NSNumber numberWithLong: DEFAULTS_BLOCKSIZE]
forKey: INDEXKEY_BLOCKSIZE];
[index setObject: [NSNumber numberWithLong: DEFAULTS_BLOCKSPERPAGE]
forKey: INDEXKEY_BLOCKSPERPAGE];
_blockSize = DEFAULTS_BLOCKSIZE;
_blocksPerPage = DEFAULTS_BLOCKSPERPAGE;
if (![index writeToFile: indexFilePath atomically: YES]) {
_dirPath = nil;
NSLog(LOGMSG_INDEXFILENOTWRITABLE);
}
[index release];
} else {
NSDictionary *index = [NSDictionary dictionaryWithContentsOfFile:
indexFilePath];
if (nil == [index objectForKey: INDEXKEY_BLOCKSIZE]) {
NSLog(LOGMSG_INDEXFILEOUTOFFORMAT);
_dirPath = nil;
} else
_blockSize = [(NSNumber*)[index objectForKey: INDEXKEY_BLOCKSIZE]
longValue];
if (nil == [index objectForKey: INDEXKEY_BLOCKSPERPAGE]) {
NSLog(LOGMSG_INDEXFILEOUTOFFORMAT);
_dirPath = nil;
} else
_blocksPerPage = [(NSNumber*)[index objectForKey:
INDEXKEY_BLOCKSPERPAGE] longValue];
[index release];
}
the [index release] on the second branch gives me the following output
on the debugger window :
TestRunnrer(1661) malloc: *** error for object 0x112a50: double free
*** set a breakpoint in malloc_error_break to debug
in the enclosing scope I have set up an autorelease pool. What I am
suspecting is that when I init the dictionary with a file it is
autoreleased, and then the error when I do the release. I this the
case ? If so where do I know when some object is created autoreleased
or not ? In the NSDictionary's reference page there is nothing
mentioned.
Many thanks
___
Cocoa-dev mailing list (Cocoa-dev@lists.apple.com)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
