UICollectionViewFlowLayout doesn't use integral frames

Question

I have recently started using UICollectionView, and am a bit confused about the UICollectionViewFlowLayout. It would seem that the frames for each cell in the collection view ar

Answer 1

Workaround: subclass UICollectionViewFlowLayout, override UICollectionViewLayout's -layoutAttributesForElementsInRect: and for every layout attributes make the frame integral:

- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect
{
    NSArray *allLayoutAttributes = [super layoutAttributesForElementsInRect:rect];
    for (UICollectionViewLayoutAttributes *layoutAttributes in allLayoutAttributes) {
        layoutAttributes.frame = CGRectIntegral(layoutAttributes.frame);
    }
    return allLayoutAttributes;
}

Note: iOS 7 UICollectionViewFlowLayout has been fixed to always use integral frames for its cells' frames. I recommend keeping the fix for iOS 6.x but conditionally deprecate it for iOS 7 and newer.

Best, Raphael