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    <p>The problem is with UIScrollView only, I also made a rage about it: <a href="https://i.stack.imgur.com/dqx3d.png" rel="noreferrer">http://i.stack.imgur.com/dqx3d.png</a></p> <p>[UPDATE 1] Here the solution:</p> <p>The situation: A UIViewController's view has a UIScrollView as subview (the scroll view paging is disabled).</p> <p>Code I use to attach the gesture the the UIView:</p> <pre><code>UISwipeGestureRecognizer *swipeLeftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipedScreenLeft:)]; [swipeLeftRecognizer setNumberOfTouchesRequired:2.0f]; swipeLeftRecognizer.delegate = self; [swipeLeftRecognizer setDirection:UISwipeGestureRecognizerDirectionLeft]; [self.view addGestureRecognizer:swipeLeftRecognizer]; [swipeLeftRecognizer release]; </code></pre> <p>To be iOS 4.3 enabled, I only had to add the UIViewController as a <code>UIGestureRecognizerDelegate</code></p> <p>Then, I used the following delegate method to intercept and allow the simultaneous recognition of the scrollView's panGesture with the view's swipe one. Here the code:</p> <pre><code>- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ if ([gestureRecognizer isKindOfClass:[UISwipeGestureRecognizer class]] &amp;&amp; [otherGestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) { return YES; } return NO; } </code></pre> <p>[UPDATE 2]</p> <p>To disable the UIScrollView panning with two fingers, I THINK that you have to make your scrollview, a custom subclass of the UISCrollView class and alter some behavior of the panGesture detector, BUT I didn't tried to do that. Instead I choosed a lazier solution, basically I enable/disable the scrollView scroll functionlity based on the current state of the UISwipeGestureRecognizer. Moreover, in order to prevent double touch movement in the other direction too, I attached another recognizer just for that purpose.</p> <p>You have to create two properties for your swipe detectors.</p> <pre><code>@property (nonatomic,assign) UISwipeGestureRecognizer *swipeRightRecognizer; @property (nonatomic,assign) UISwipeGestureRecognizer *swipeLeftRecognizer; </code></pre> <p>Then I coded like this:</p> <pre><code>[self setSwipeRightRecognizer:[[UISwipeGestureRecognizer alloc] initWithTarget:nil action:nil]]; [swipeRightRecognizer setNumberOfTouchesRequired:2.0f]; swipeRightRecognizer.delegate = self; [swipeRightRecognizer setDirection:UISwipeGestureRecognizerDirectionRight]; [self addObserver:self forKeyPath:@"swipeRightRecognizer.state" options:(NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld) context:NULL]; [self.view addGestureRecognizer:swipeRightRecognizer]; [swipeRightRecognizer release]; [self setSwipeLeftRecognizer:[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipedScreenLeft:)]]; [swipeLeftRecognizer setNumberOfTouchesRequired:2.0f]; swipeLeftRecognizer.delegate = self; [swipeLeftRecognizer setDirection:UISwipeGestureRecognizerDirectionLeft]; [self addObserver:self forKeyPath:@"swipeLeftRecognizer.state" options:(NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld) context:NULL]; [self.view addGestureRecognizer:swipeLeftRecognizer]; [swipeLeftRecognizer release]; </code></pre> <p>then add this method:</p> <pre><code>- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if (self.swipeRightRecognizer.state == UIGestureRecognizerStateFailed) { self.scrollView.scrollEnabled = YES; return; } if ([self.swipeRightRecognizer numberOfTouches] != 2.0f) { self.scrollView.scrollEnabled = YES; } else{ self.scrollView.scrollEnabled = NO; } } </code></pre> <p>And update the existing method I posted in the previous "[UPDATE]":</p> <pre><code>- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ if ([gestureRecognizer isKindOfClass:[UISwipeGestureRecognizer class]] &amp;&amp; [otherGestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) { if ([gestureRecognizer numberOfTouches] != 2.0f) { self.scrollView.scrollEnabled = YES; } else{ self.scrollView.scrollEnabled = NO; } return YES; } return NO; } </code></pre> <p>Finally, remove the observers in the dealloc:</p> <pre><code>[self removeObserver:self forKeyPath:@"swipeRightRecognizer.state"]; [self removeObserver:self forKeyPath:@"swipeLeftRecognizer.state"]; </code></pre> <p>I bet there is a cleaner solution, but it works.. .</p> <p>Hope it helps ;)</p>
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    1. COOkay so I added UIGestureRecognizerDelegate to my main view controller's header file: @interface MainViewController : UIViewController <UIGestureRecognizerDelegate> { And then defined the delegate method like you did: - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ ... } but the delegate method never seems to get called. I even put an NSLog into it and I never see that pop up in the console, so something is weird. Any idea what might prevent the delegate from being called?
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    2. COI think I just needed to add the delegate to each of my gestures (for example [swipeDownGesture setDelegate:self]; etc...). while that seems to work, the behavior is still different than 4.2. In iOS 4.2 when I touched my scrollView with two fingers (for example when Iw as beginning a gesture) it would not scroll (it would only scroll with one finger). Now it seems to scroll while I am attempting the gesture with two fingers. Any idea why that behavior would be different?
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    3. CO@Jackson post updated ;)
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