Warning: UICollectionViewFlowLayout has cached frame mismatch for index path 'abc'

Question

This is the code causing the warning:

private override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes         


        

Answer 1

In addition to the great answer above.

I know the example code is written in swift, but I thought that it can be helpful to have the Objective-C version.

For Objective-C, this won't work, because the copy function does only a shallow copy. You will have to do this:

NSArray * original   = [super layoutAttributesForElementsInRect:rect];
NSArray * attributes = [[NSArray alloc] initWithArray:original copyItems:YES];

I have added a temp variable for readability.