Question

I would like to catch the type of UIGestureRecognizer.
Am I allowed to do it this way?

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    NSLog(@"Gesture should begin");
    if ([gestureRecognizer isMemberOfClass:[UIRotationGestureRecognizer class]])
        NSLog(@"rotate");
    if ([gestureRecognizer isMemberOfClass:[UIPinchGestureRecognizer class]])
        NSLog(@"pinch");
    if ([gestureRecognizer isMemberOfClass:[UITapGestureRecognizer class]])
        NSLog(@"tap");
    if ([gestureRecognizer isMemberOfClass:[UIPanGestureRecognizer class]])
        NSLog(@"pan");
    if ([gestureRecognizer isMemberOfClass:[UILongPressGestureRecognizer class]])
        NSLog(@"long");
    if ([gestureRecognizer isMemberOfClass:[UISwipeGestureRecognizer class]])
        NSLog(@"swipe");
    return NO;
}

I have a long touch gesture in table view cell.
If I press the cell I receive a log:

-[FileObjectView gestureRecognizerShouldBegin:] [Line 45] Gesture should begin
-[FileObjectView gestureRecognizerShouldBegin:] [Line 55] long

And I want it to work this way.

But sometimes while I scroll my table view I receive a log:

-[FileObjectView gestureRecognizerShouldBegin:] [Line 45] Gesture should begin

It makes me think that I’m not aware of some type of gesture.

Can anybode explain the situation?

Answer 1

I’ve decided to check the class name this way:

NSLog(@"%@",gestureRecognizer.class);

Class name is: UIScrollViewPanGestureRecognizer

I have checked this issue a lot of times on differen iOS versions.

This thing happens only on iOS 6. One more iOS 6 bug?!