iOS 8 GM does not update constraints on collection views

Question

In Xcode 6 Beta 7 and all versions before it, I had a collection view that would update its constraints on its cells when an iPad would rotate between landscape and portrait. No

Answer 1

You need to make a subclass of UICollectionViewCell and make that subclass as the superclass of ALL of your cells.

Example:

@interface MDTCollectionViewCell : UICollectionViewCell
@end

@implementation MDTCollectionViewCell

- (void)setBounds:(CGRect)bounds {
    [super setBounds:bounds];
    self.contentView.frame = bounds;
}

@end

Answer 2

in my UICollectionViewCell class I added

override func layoutSubviews() {
    contentView.frame = bounds
    super.layoutSubviews()
}

and I used this code to refresh

dispatch_async(dispatch_get_main_queue(), { () -> Void in
    // in this case vController is UICollectionView
    self.vController.reloadData()
    self.vController.layoutSubviews()
})

Answer 3

The workaround I have come up with is to use the 8.0 simulator for testing in the sim, and build the deployable using Xcode Beta 7. When I build using Beta 7, the app runs without this issue on devices using iOS 7. However, this does not help anyone that is deploying to the app store, so I apologize if this workaround does not work for your situation.

Answer 4

Override the custom cell's layoutSubviews as a temporary fix:

override func layoutSubviews() {
    contentView.frame = bounds
    super.layoutSubviews()
}