Controlling iOS scrolling
Morning folks Happy New Year, I've got an iOS app that needs to have a UIScrollView containing a horizontal row of UIImageViews, all the same size. The UIScrollView will be a subclass as I need it to implement some additional behaviour, but I've got 2 questions which may already be built in (but I can't find anything relating to it): [1] Is there an easy way of looping the scrolling (so that you don't hit either end of scrolling, you keep going around and around)? [2] Is there any way to, upon decelerating, ensure that one of the imageviews is always centred in the scrollview? Ideally with swish decelerating taking place, looking like the user lined it up perfectly each time the scrolling comes to rest. Thanks in advance for any pointers, Ken - - - - - - - - - - Dr. Ken Tabb Mac, iOS UNIX Developer - Health Human Sciences Machine Vision Neural Network researcher - School of Computer Science University of Hertfordshire, UK ___ 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: Controlling iOS scrolling
Take a look at the WWDC videos from either 2010 or 2011... Advanced Scroll View Techniques I think was the title. These topics are covered in some depth. You will likely also want to examine UIScrollView's -pagingEnabled property as relates to your second question. (Sent from my iPhone.) -- Conrad Shultz Synthetiq Solutions On Jan 9, 2012, at 1:09, Ken Tabb k.j.t...@herts.ac.uk wrote: Morning folks Happy New Year, I've got an iOS app that needs to have a UIScrollView containing a horizontal row of UIImageViews, all the same size. The UIScrollView will be a subclass as I need it to implement some additional behaviour, but I've got 2 questions which may already be built in (but I can't find anything relating to it): [1] Is there an easy way of looping the scrolling (so that you don't hit either end of scrolling, you keep going around and around)? [2] Is there any way to, upon decelerating, ensure that one of the imageviews is always centred in the scrollview? Ideally with swish decelerating taking place, looking like the user lined it up perfectly each time the scrolling comes to rest. Thanks in advance for any pointers, Ken - - - - - - - - - - Dr. Ken Tabb Mac, iOS UNIX Developer - Health Human Sciences Machine Vision Neural Network researcher - School of Computer Science University of Hertfordshire, UK ___ 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/conrad%40synthetiqsolutions.com This email sent to con...@synthetiqsolutions.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: Does NSOpenGLView override -isOpaque?
On Jan 6, 2012, at 11:57 AM, vincent habchi wrote:
Corbin,
Yes, NSOpenGLView has:
- (BOOL)isOpaque {
return YES;
}
Thanks for your answer!
Could the documentation then mention than when an NSOpenGLView occupies the
whole frame of its parent window, and when its context is set to draw under,
one should override -isOpaque to return NO, otherwise nothing gets drawn?
Hi Vincent,
Yes, we can improve the docs! Can you log a bug on bugreporter.apple.com asking
for it to be improved? that is the best way to get this updated.
thanks,
corbin
Thanks again, have a nice day!
Vincent
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music.read-only sandbox entitlement doesn't seem to work
I'm converting over a legacy Core-Audio application to run sandboxed. This app normally access files in the iTunes library in order to analyze them for BPM information. Enabling the music.read-only entitlement does not work. com.apple.security.assets.music.read-only I get the following error: deny file-read-data /Users/smj/Music/iTunes/iTunes Music/Depeche Mode/Violator/01 World In My Eyes.mp3 I have been able to overcome this problem by adding the temporary exception to perform relative reads from the users home directory using this path: /Music/iTunes/iTunes Music/ My issue with this solution is that it is temporary! Can anyone shed light on why the music entitlement is not working? As I indicated I'm using Core Audio APIs. Do I need to switch to AVAsset or something like this to make this work? Some other little detail I'm leaving out? One other thought that just occurred to me is that I'm using the paths I get from iTunes to try and access these files. These paths are absolute from the root directory and look something like this: Unable to open track file://localhost/Users/michael/Music/iTunes/iTunes%20Music/Depeche%20Mode/Violator/01%20World%20In%20My%20Eyes.mp3 (File not found) Do I need to specify some sort of relative substitute when using *.music.read-only? -Michael ___ 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
Core Data ignoring validation constraint
I have a data model where one of the string attributes has both a min and max length validation requirement. At run time though, only the max length constraint seems to exist. Violating the min length constraint doesn't cause validation failures, whether using -validateForInsert: or -validateValue:forKey:error: For example: NSString *tooShortName = @a; NSError *validationError = nil; [category validateValue:tooShortName forKey:@name error:validationError]; At this point validationError is still nil. Continuing: [category setValue:tooShortName forKey:@name]; [category validateForInsert:validationError]; ...still nil. I suspected that the data model GUI might be lying to me so I looked at the model file directly (glad it's XML) and found this for the attribute: attribute name=name attributeType=String minValueString=10 maxValueString=100 syncable=YES/ So, both constraints are in the model file. They don't both get loaded at run time though: (gdb) po category entity] attributesByName] objectForKey:@name] validationPredicates] __NSArrayM 0x897bcd0( length = 100 ) I tried creating a new project to test this and got the same thing immediately. Is there some additional step I've missed? I'm using Xcode 4.2.1 on Mac OS X 10.7.2; results are the same in the simulator and on an iPhone 4s running iOS 5.0.1. -- Tom Harrington atomicb...@gmail.com AIM: atomicbird1 ___ 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: music.read-only sandbox entitlement doesn't seem to work
On Jan 09, 2012, at 12:52 PM, Michael Crawford wrote: I'm converting over a legacy Core-Audio application to run sandboxed. This app normally access files in the iTunes library in order to analyze them for BPM information. Enabling the music.read-only entitlement does not work. com.apple.security.assets.music.read-only I get the following error: deny file-read-data /Users/smj/Music/iTunes/iTunes Music/Depeche Mode/Violator/01 World In My Eyes.mp3 I have been able to overcome this problem by adding the temporary exception to perform relative reads from the users home directory using this path: /Music/iTunes/iTunes Music/ I don't have a solution for you, but I wanted to point out that even using temporary exceptions won't work for everyone - you can change iTune's music library to some other path within iTunes. -- Darkshadow (aka Michael Nickerson) http://www.nightproductions.net ___ 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
Maintaining Image for a UIButton
This is easy in OSX and bindings. But how do I maintain the aspect ratio of an UIImage place in a UIButton... via [myButton setImage...] or [myButton setBackgroundImage...]. In IB, there is a setting for Aspect Ratio in the View settings but it seems to make zero difference. ___ 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
Issue in iTunes COM for Windows SDK with iOS5
Hi All,
This is regarding iTunes COM for Windows SDK. This may not be the proper place
to post this question, but there doesn’t seem to be a list for the same.
I am trying to transfer audio files to iPhone through iTunes SDK
Following is the code snippet which I am using to transfer the file
IITUserPlaylist upl = (IITUserPlaylist)playListSorce;
IITOperationStatus status = upl.AddFile(track);
while (status.InProgress)
{
Thread.Sleep(100);
}
IITTrackCollection tracksList = upl.Tracks;
tracksList[trackCount].Album = playListSorce.Namehttp://playListSorce.Name/;
When the file sync is in progress then Status.InProgress returns true for all
non IOS 5 devices, however for devices having IOS5 on it status.InProgress
returns false even if the file is in sync.
tracksList[trackCount].Album = playListSorce.Namehttp://playListSorce.Name/
this statement thorws an exception if file sync is in progress. As in case of
IOS 5 devices status.InProgress retruns false , functionality is not working as
expected. Does any one know the solution to resolve this issue?
Any help will be greatly appreciated . Please let me know the mailing list
where this question can be posted?
Thanks Regards,
Payal
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