方式一:
[UIView setAnimationsEnabled:NO];
[collectionView performBatchUpdates:^{
[collectionView reloadData];
} completion:^(BOOL finished) {
[UIView setAnimationsEnabled:YES];
}];
方式二:
[UIView animateWithDuration:0 animations:^{
[collectionView performBatchUpdates:^{
[collectionView reloadData];
} completion:nil];
}];
解决UICollectionView ReloadData闪一下(隐式动画)
原文：http://www.cnblogs.com/Rinpe/p/5850238.html