为什么当我单击CollectionView中的自定义单元时，它们没有突出显示？

Question

当我单击它们时，click（显示警报或进入新视图）的功能正常，但是我单击的单元格的外观没有改变。如何使我单击的单元格突出显示？ THX〜

Answer 1

Add a public method performSelectionAnimations to the definition of MyCollectionViewCell. Then call it from collectionView:didSelectItemAtIndexPath:

-(void)performSelectionAnimations {

...


...
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
MyCollectionViewCell *cell = (MyCollectionViewCell *)[collectionView cellForItemAtIndexPath:indexPath];
[cell performSelectionAnimations];
}

Notice I've taken out the call to [cell setSelected:YES], since that should already be taken care of by the UICollectionView.

Answer 2

You must do it programmatically. Look at :

https://developer.apple.com/library/ios/documentation/WindowsViews/Conceptual/CollectionViewPGforIOS/CollectionViewPGforIOS.pdf#page18

When you tap on the cell the highlight state change to YES, but you must implement de behaviour (ie change background cell on click).