I set up a source handler on a TCP socket like this:
dispatch_source_t newsrc =
dispatch_source_create(DISPATCH_SOURCE_TYPE_READ,sockfd,0,globalQueue);
It works well, and when a client process closes his socket my cancel_handler
gets called, I clean up, and life is good. But if I do a
On Jan 10, 2011, at 2:58 PM, Ken Thomases wrote:
On Jan 10, 2011, at 4:20 PM, Dave Zarzycki wrote:
On Jan 10, 2011, at 2:06 PM, Jonathon Kuo wrote:
I set up a source handler on a TCP socket like this:
dispatch_source_t newsrc =
dispatch_source_create(DISPATCH_SOURCE_TYPE_READ,sockfd,0
On Jan 5, 2011, at 12:41 PM, Dave Keck wrote:
Q: When a context object is set with dispatch_set_context(), is it retained?
Or do I need to retain it first, set it, and then in the cancel handler
release it?
The 'context' argument is not retained. You can infer this primarily
by the
On Jan 6, 2011, at 1:15 PM, Fritz Anderson wrote:
Taking by value to mean as many uninterpreted bits as will fit into a
variable of type void*, yes.
On Jan 6, 2011, at 1:14 PM, Dave Zarzycki wrote:
Yes, that is the nature of void *. Nothing can be known about a void * other
than the value
of main(). Thereafter, Unix APIs like
read(), write(), etc will return -1 and errno will be equal to EPIPE.
davez
On Jan 6, 2011, at 1:22 PM, Jonathon Kuo wrote:
On Jan 6, 2011, at 1:15 PM, Fritz Anderson wrote:
Taking by value to mean as many uninterpreted bits as will fit into a
variable
When a GCD source gets cancelled, either via dispatch_source_cancel() or
because the source went away, I have no context other than the
dispatch_source_t source variable. How can I know for which source a source
cancel handler gets invoked? I have many simultaneous sources (sockets, files,
, at 10:58 AM, Jonathon Kuo wrote:
When a GCD source gets cancelled, either via dispatch_source_cancel() or
because the source went away, I have no context other than the
dispatch_source_t source variable. How can I know for which source a source
cancel handler gets invoked? I have many
I'm trying to learn GCD and reading
http://developer.apple.com/library/mac/#featuredarticles/BlocksGCD/index.html
But the Global Concurrent Queues example in that document (last updated
2010-11-10) doesn't even compile. It complains about accessing array 'result'
from within the block:
#define
[COUNT];
} results;
davez
On Dec 14, 2010, at 7:30 PM, Jonathon Kuo wrote:
I'm trying to learn GCD and reading
http://developer.apple.com/library/mac/#featuredarticles/BlocksGCD/index.html
But the Global Concurrent Queues example in that document (last updated
2010-11-10
On Nov 17, 2010, at 8:47 AM, Matt Neuburg wrote:
On Nov 16, 2010, at 9:26 AM, Jonathon Kuo wrote:
I agree: that's how I expected it to work, too, but that's not how it does
work (Xcode 3.2.4). If I drag a Round Rect Button onto the Toolbar, it
instantly gets promoted to a UIBarButtonItem
On Nov 17, 2010, at 10:54 AM, Matt Neuburg wrote:
On Nov 17, 2010, at 10:25 AM, Jonathon Kuo wrote:
One question though: Taking another poster's suggestion, I placed a UISwitch
in the toolbar and set Touch Down on it. It does register, but only for the
OFF - ON transition. Switching
On Nov 16, 2010, at 9:12 AM, Matt Neuburg wrote:
On Mon, 15 Nov 2010 10:02:44 -0800, Jonathon Kuo
newsli...@autonomy.caltech.edu said:
Interesting idea, probably a little beyond me. :)
Nonsense. This is perfectly standard and easy. A UIButton can send an action
message on TouchDown
UIBarItem from
NSObject. Since they're not really buttons, there doesn't appear any way to
modify their behavior. If there is a way, I'd like to know, too...
From: Jonathon Kuo newsli...@autonomy.caltech.edu
To: Cocoa-Dev List cocoa-dev@lists.apple.com
Sent
I'm doing an iPhone 4.1 app and I have a toolbar at the bottom with bar
buttons. The problem is that I need to set one of the bar buttons to Touch
Down instead of the default Touch Up Inside but IB doesn't show any touch
options for toolbar buttons (it does for buttons not in the toolbar).
Is
What's the point of doing this:
NSPopUpButtonCell *testCell = [ [ [ NSPopUpButtonCell alloc] init]
autorelease];
if you're doing this 2 lines later:
testCell = [ olPopups selectedCell];
At this point, I would check for testCell being nil.
-Jon
On Oct 29, 2010, at 2:02 PM,
You're missing a [theImage release] at the end of your method.
On Oct 5, 2010, at 2:46 PM, Chris Tracewell wrote:
I have an NSImageView that accepts an image drop then sizes the image and
ftp's it to a web server. The image view is bound to myObject.myImage
property which set by a window
On Aug 10, 2010, at 5:43 PM, Devraj Mukherjee wrote:
Hi all,
I am using UISliders in my iOS app.
I can't see a way of setting the slide value interval. Is this
possible? Or do I have to calculate the change based on the 0.1
increases?
Minimum value set to -20 and Max to 20 and I want
On Aug 4, 2010, at 9:43 AM, David Duncan wrote:
A UIView (really the CALayer owned by the view) can and will display content
larger than its bounds if given to it.
Is there a way to restrict this behavior, i.e., to make it that the UIView does
not display content beyond its bounds? I'm
On Jul 22, 2010, at 1:10 PM, Quincey Morris wrote:
id _id;
for (_id in array) {
}
if (_id)
{
}
If I use this to go backward through the array:
for (_id in [array reverseObjectEnumerator]) {
}
...is it still considered 'fast' enumeration?
-Jon
On Jul 1, 2010, at 7:56 AM, Matt Neuburg wrote:
Instance methods defined in a root class can be performed both by instances
and by class objects. Therefore, all class objects have access to the
instance methods defined in the root class.
Not that it would generally be USEFUL to do so, since
On Jul 1, 2010, at 9:49 AM, Kyle Sluder wrote:
On Jul 1, 2010, at 9:42 AM, Jonathon Kuo newsli...@autonomy.caltech.edu
wrote:
On Jul 1, 2010, at 7:56 AM, Matt Neuburg wrote:
Instance methods defined in a root class can be performed both by instances
and by class objects. Therefore, all
I've created a subclass of NSTextFieldCell that just adds the
-hitTestForEvent:inRect:ofView:
method. If I substitute my subclass in an NSTableView for the standard
NSTextFieldCells, I do get this callback when a table element is clicked.
But if I substitute my subclass in for an
mini color picker thingy.
corbin
On Mar 12, 2010, at 2:17 PM, Jonathon Kuo wrote:
I need to generate an ad-hoc number of color swatches in a floating window
so that when a user clicks on one of them, the 'active' color of a stylus
will change to that color. Most likely NSColorWell
How can I intercept or get notified when a user clicks on an NSColorWell?
OSX 10.6.2
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:
Subclass and override mouseDown: - however if you're trying to intercept
right before the color panel is shown, or a drag starts, that may be trickier.
What are you trying to do generally?
On Mar 12, 2010, at 1:30 PM, Jonathon Kuo wrote:
How can I intercept or get notified when a user clicks
There used to be an open source Cocoa-based GPS framework for OSX
called FourCoordinates, but I can't find it anywhere on the web
anymore, just dead links. Is there something more modern that has
replaced it?
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Location,
which is pretty solid from my understanding.
-Steven
On Fri, Feb 12, 2010 at 11:57 AM, Jonathon Kuo newsli...@autonomy.caltech.edu
wrote:
There used to be an open source Cocoa-based GPS framework for OSX
called FourCoordinates, but I can't find it anywhere on the web
anymore
I can't chance upon the right incantation for using both an existing
variable and an inline new one in a for loop. I've boiled this down to
a trivial show case, same results for both gcc 4.0.1 and 4.2.1:
int i;
. . .
for (i=0, int m=0; i5; i++) { . . . };
printf(Final value of i:
On Nov 12, 2009, at 12:14 PM, Greg Parker wrote:
On Nov 12, 2009, at 11:29 AM, Jonathon Kuo wrote:
I can't chance upon the right incantation for using both an
existing variable and an inline new one in a for loop. I've boiled
this down to a trivial show case, same results for both gcc 4.0.1
I'm writing an app for the iPhone, but I need to be mindful how much
virtual memory there is available to the app when it runs, so I can
manage allocing and deallocing some large arrays. I'm guessing that
the OS runs in a small amount (100MB?) of flash memory compared to the
16GB or 32GB
On Aug 18, 2009, at 4:37 PM, Luke the Hiesterman wrote:
Your app will not be paged to the disk at all. It must run entirely
on in physical memory. To know when you're running out of memory,
override -[UIViewController didReceiveMemoryWarning]
On Aug 18, 2009, at 4:38 PM, Alex Kac wrote:
On May 4, 2009, at 8:12 PM, Ken Thomases wrote Re: 'A couple NSRunLoop
questions':
Every thread has exactly one run loop associated with it. You don't
create run loops nor do you remove them.
On May 5, 2009, at 9:24 PM, Michael Ash wrote Re: 'NSNotificationQueue
NSOperationQueue thread
On May 6, 2009, at 9:03 AM, Michael Ash wrote:
It is correct that every thread conceptually has exactly one runloop.
I say conceptually because in fact they are created on demand.
So if a thread has no need to pay attention to asynchronous events
(timers, input sources, etc) but is only in
In NSString theres -intValue, -floatValue, -doubleValue, but no -
hexValue (that I can find). I'd like to convert ascii hex NSStrings
(@001A4CD3 etc) into integer values. Having a -hexValue method would
make that a snap. If theres no Cocoa way, I guess I could try my hand
at writing a
success = [[NSScanner scannerWithString:string]
scanHexInt:yourValueHere];
Ali
On Mar 23, 2009, at 6:00 PM, Jonathon Kuo wrote:
In NSString theres -intValue, -floatValue, -doubleValue, but no -
hexValue (that I can find). I'd like to convert ascii hex NSStrings
(@001A4CD3 etc) into integer
On Dec 12, 2008, at 2:29 PM, Nick Zitzmann wrote:
In most 32-bit programs, even trying to allocate hundreds of
megabytes of contiguous RAM at once often fails due to memory
fragmentation.
Is there a function that allocates contiguous RAM? You mean VRAM,
right? I thought anything you
On Dec 12, 2008, at 10:36 AM, has wrote:
Mr. Gecko wrote:
I'm trying to find out how to announce the time every 30 minutes,
You could run 'say `date`' as a cron job.
Interesting. The speaker translates Fri Dec 12 17:52:58 PST 2008
into these spoken words:
free december twelfth
No, we were never able to find a fix or workaround for this. We're
operating now on the assumption that it's an unfixable design flaw in
DO. This makes for a very fragile client/server implementation.
Jonathon
On Dec 6, 2008, at 1:31 AM, Bridger Maxwell wrote:
Hey,
Did you ever figure
I have some tiny images (4x3, etc) that I'm displaying in a large
NSImageView. I set the view with setImageScaling:NSScaleToFit. This
works, but instead of getting well-defined block 'pixels', I get sort
of a 'shower-door' gradient effect within each pixel block.
inline: Picture 59.png
:
NSImageInterpolationNone];
On 2 Dec 2008, at 23:45, Jonathon Kuo wrote:
I have some tiny images (4x3, etc) that I'm displaying in a large
NSImageView. I set the view with setImageScaling:NSScaleToFit. This
works, but instead of getting well-defined block 'pixels', I get
sort of a 'shower-door
On Nov 19, 2008, at 9:27 PM, Austin Ziegler wrote:
For a project that I'm working on, I have a need to write a code
generator that will wrap certain kinds of C functions as Objective C
messages on an Objective C proxy. Because I don't ultimately control
the input, the parameters on the C
On Nov 20, 2008, at 2:07 PM, Shawn Erickson wrote:
On Thu, Nov 20, 2008 at 1:23 PM, Jonathon Kuo
[EMAIL PROTECTED] wrote:
Just my 2 cents, but it seems an abuse to turn functions into
objects.
Functions don't retain state; objects do. Objective C very
gracefully allows
objects to call C
On Nov 20, 2008, at 5:06 PM, Charles Srstka wrote:
On Nov 20, 2008, at 5:58 PM, Jonathon Kuo wrote:
On Nov 20, 2008, at 2:07 PM, Shawn Erickson wrote:
On Thu, Nov 20, 2008 at 1:23 PM, Jonathon Kuo
[EMAIL PROTECTED] wrote:
Just my 2 cents, but it seems an abuse to turn functions
On Nov 20, 2008, at 5:53 PM, Charles Srstka wrote:
On Nov 20, 2008, at 7:40 PM, Jonathon Kuo wrote:
On Nov 20, 2008, at 5:06 PM, Charles Srstka wrote:
On Nov 20, 2008, at 5:58 PM, Jonathon Kuo wrote:
On Nov 20, 2008, at 2:07 PM, Shawn Erickson wrote:
On Thu, Nov 20, 2008 at 1:23 PM
On Oct 17, 2008, at 5:33 PM, Michael Ash wrote:
On Fri, Oct 17, 2008 at 5:29 PM, Kyle Sluder
[EMAIL PROTECTED] wrote:
On Fri, Oct 17, 2008 at 5:17 PM, Jonathon Kuo
[EMAIL PROTECTED] wrote:
Just curious why the recommendation against system()?
1) There's no need for it here. Why launch
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