LongPress on an empty area of the collectionView causes the app to crash

[TheCoordinator]

If the long press is not happening on the cell but on the empty space of the UICollectionView, it causes an NSRangeException.

You can reproduce the bug from the FlowLayoutDemo app.

[bentech]

I also have this problem

[wiruzx]

Try this:

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

    if (indexPath.row >= [self.items[indexPath.section] count]) {
        return NO;
    }

    return YES;
}

[alessandro-martin]

Thanks wiruzx, that solved the problem. It also prevents from selecting a nearby cell if touching empty space which is (usually) the desirable behaviour.

[hachinobu]

@wiruzx Thanks wiruzx, It was a tremendous help.