Avoid animation of UICollectionView after reloadIt

Question

UICollectionView animate items after reloadItemsAtIndexPaths is called (fade animation).

Is there a way to avoid this animation?

iOS 6

Answer 1

It's worth noting that if you're targeting iOS 7 and above, you can use the new UIView method performWithoutAnimation:. I suspect that under the hood this is doing much the same as the other answers here (temporarily disabling UIView animations / Core Animation actions), but the syntax is nice and clean.

So for this question in particular...

Objective-C:

[UIView performWithoutAnimation:^{
    [self.collectionView reloadItemsAtIndexPaths:indexPaths];
}];

Swift:

UIView.performWithoutAnimation {
    self.collectionView.reloadItemsAtIndexPaths(indexPaths)
}

Of course this principle can be applied for any situation that you want to ensure a change is not animated.

Answer 2

- (void)reloadCollectionViewAnimated:(BOOL)animated  {

    if (animated) {
        [self.collectionView performBatchUpdates:^{
            [self.collectionView reloadSections:[NSIndexSet indexSetWithIndex:0]];
        } completion:^(BOOL finished) {

        }];
    } else {
        [CATransaction begin];
        [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
        [self.collectionView reloadSections:[NSIndexSet indexSetWithIndex:0]];
        [CATransaction commit];
    }

}