When is the appropriate moment in rotation to change the Layout parameters of a UICollectionView

Question

Hopefully a simple question for a relatively new UIKit control

I have a UICollectionView that has a viewLayout with a single row o

Answer 1

I'm working on a similar problem.

Currently, my UICollectionViewController has two instance variables of UICollectionViewFlowLayout, each with the appropriate insets for portait or landscape.

On rotation, I do this:

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
                               duration:(NSTimeInterval)duration{

    if (UIDeviceOrientationIsPortrait(toInterfaceOrientation)) {
        [_itemCollection setCollectionViewLayout:_portraitLayout];
        [_itemCollection reloadData];
    } else {
        [_itemCollection setCollectionViewLayout:_landscapeLayout];
        [_itemCollection reloadData];
    }
}

The only problem that I'm having is that it randomly crashes with exc_bad_access on setCollectionViewLayout randomly.

Something like the above might work for you. I'm not sure if this is the right way to do things. I have only recently started using UICollectionViews.