UICollectionView [NSIndexPath section]: message sent to deallocated instance

在UICollectionView上加UITapGestureRecognizer手势时，点击哪都报

[NSIndexPath section]: message sent to deallocated instance

错误，查找了半天，才发现

http://*.com/questions/20453291/uicollectionview-crashes-randomly-because-of-highlighting-issue

后

-(BOOL) collectionView:(UICollectionView *)collectionView shouldHighlightItemAtIndexPath:(NSIndexPath *)indexPath{

return NO;

}

解决，但为什么呢，改天再去看一下，追进度先