移除UICollectionView ReloadData自带隐

方法一（推荐）、

[UIView performWithoutAnimation:^{

    [collectionView reloadData];   

 }];

方法二、

[UIView animateWithDuration:0animations:^{

    [collectionView performBatchUpdates:^{

        [collectionView reloadData];

} completion:nil];}];

方法三、

[UIView setAnimationsEnabled:NO];

[collectionView performBatchUpdates:^{

    [collectionView reloadData];

} completion:^(BOOL finished){

    [UIView setAnimationsEnabled:YES];

}];