ios6

I'm trying to reload only data section, not header or footer (supplementary view), of UICollectionView. When I use reloadData method, header and footer section also reloads, so that's what I want. I found the method reloadSections: , but I don't know why it doesn't work. Because my collection view only contains one section, so I tried using the method like this: [collectionViewController.collectionView reloadSections:[NSIndexSet indexSetWithIndex:0]]; But it makes runtime error when the method is called. The content of error is: 'NSInvalidArgumentException', reason: '-

So I'm currently working on a project that has a button that adds cells to a UICollectionView and then needs to automatically scroll to the last cell (i.e. the bottom of the UICollectionView). I've found the method scrollToItemAtIndexPath:(NSIndexPath *)indexPath atScrollPosition:(UICollectionViewScrollPosition)scrollPosition animated:(BOOL)animated But now I'm getting stuck at trying to find the indexPath of the last object in the CollectionView. The problem seems to lie in that I've been trying to think of the cells in the UICollectionView as an array (can't enumerate through them, doesn't

I am writing a shell script to automatically generate an Apple Passbook signature file from manifest.json using p12 certificate. Here is what I do: openssl pkcs12 -passin pass:"mypass" -in "mycert.p12" -clcerts -nokeys -out certificate.pem openssl pkcs12 -passin pass:"mypass" -in "mycert.p12" -nocerts -out key.pem openssl smime -passin pass:"mypass" -binary -sign -signer certificate.pem -inkey key.pem -in manifest.json -out signature -outform DER The first two functions work fine. At least both certificate.pem and key.pem are created. The signature file is also created, but for some reason it

I have a ARC ( automatic-reference-counting ) app that builds a static library (also ARC). The app will launch fine but when the an action is performed that reads or writes to a @property in the static library the app will crash with this error: dyld: lazy symbol binding failed: Symbol not found: _objc_setProperty_nonatomic Referenced from: /var/mobile/Applications/0E7ADBB4-FFE5-4CEB-B418-8A35A92E99D4/MyApp.app/MyApp Expected in: /usr/lib/libobjc.A.dylib dyld: Symbol not found: _objc_setProperty_nonatomic Referenced from: /var/mobile/Applications/0E7ADBB4-FFE5-4CEB-B418-8A35A92E99D4/MyApp.app

I was able to display a subtitle track with AVPlayer on iOS 6, but I am not able to customize it. It just shows the same style (a small font size, in white). Here's how I select the subtitle: AVMediaSelectionGroup *subtitle = [asset mediaSelectionGroupForMediaCharacteristic: AVMediaCharacteristicLegible]; [self.videoPlayer.currentItem selectMediaOption:subtitle.options[0] inMediaSelectionGroup: subtitle]; And how I'm trying to customize the subtitle: AVTextStyleRule *rule = [[AVTextStyleRule alloc] initWithTextMarkupAttributes:@{ (id)kCMTextMarkupAttribute_ForegroundColorARGB : @[ @1, @1, @0,

In new iOS 6, viewDidUnload is deprecated and we have been instructed to use didReceiveMemoryWarning instead, to manage objects in UIViewController instances and subclasses. Is it equally effective to assign nils to UIView kinds inside didReceiveMemoryWarning like the way it has been done inside viewDidUnload ? I am asking this because these two methods seems to be working differently. It seems like didReceiveMemoryWarning doesn't guarantee viewDidLoad to be called again to re-instantiate any necessary UIViews. I suspect with iOS 6, memory management is done without requiring to manually