Problems with UISwipeGestureRecognizer, UITapGestureRecognizer and MPMoviePlayerController :-(

Question

This has me completely stumped!

I have a Tap Gesture Recognizer for show/hide menus...

I also have a Swipe Gesture Recognizer for swiping left and right between screens...

I then also have an MPMoviePlayerController for playing back video on the screen.

I am implementing gestureRecognizer:shouldReceiveTouch: and excluding all UIControls and anything that has the prefix "MP".

Problem is, whenever I swipe left and right on the movie player controls, the shouldReceiveTouch only notices the Tap Gesture Recognizer, NOT the swipe one. It also traces NO correctly, and yet STILL triggers the swipe method.

I've tried looking at gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:otherGestureRecognizer but that's just REALLY confused me, because it also contains a UIPanGestureRecognizer... Where did THAT come from?

Please help, I am tired and have a big deadline... and can't work it out :(

Thank you all!

:-Joe

Rabe Bernd Rabe Bernd · Accepted Answer · 2010-11-25T09:04:27

I'd the same problem. Here's what I did to overcome the problem. In the [self doSomething...] methods I do some animation and if the animation finishes it sets the enabled state of the recognizer back to YES. Be aware of the fact, that you set the correct recognizer back to enabled! (here I have to (left/right), so the gestureRecognizers array has 2 entries.

- (void)handleSwipeGesture:(UISwipeGestureRecognizer *)recognizer
{
    if (recognizer.state == UIGestureRecognizerStateEnded && recognizer.enabled) {
        recognizer.enabled = NO;
        if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft)
        {
            [self doSomethingInteresting];
        }
        else {
            [self doSomethingElseInteresting];
        }
    }
}

[UIView transitionWithView:self.containerView
          duration:kAnimationDuration
            options:UIViewAnimationOptionTransitionCurlDown
         animations:^{ your animations }
         completion:^(BOOL finished) {
                if (self.containerView.gestureRecognizers.count) {
             ((UISwipeGestureRecognizer *)[self.containerView.gestureRecognizers objectAtIndex:0]).enabled = YES;
} }];

Problems with UISwipeGestureRecognizer, UITapGestureRecognizer and MPMoviePlayerController :-(

2 Answers