uigesturerecognizer

UIPanGestureRecognizer on MKMapView?

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Ok, because no one knew, I had to spent one Apple technical support consult for it. ;o) Because MKMapView evidently has its own recognizers to interact with user, you have to adhere to the UIGestureRecognizerDelegate protocol and implement (BOOL)gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer: like this: – (void)viewDidLoad { … UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(showPan)]; panGesture.delegate = self; … Read more

How can you add a UIGestureRecognizer to a UIBarButtonItem as in the common undo/redo UIPopoverController scheme on iPad apps?

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Note: this no longer works as of iOS 11 In lieu of that mess with trying to find the UIBarButtonItem’s view in the toolbar’s subview list, you can also try this, once the item is added to the toolbar: [barButtonItem valueForKey:@”view”]; This uses the Key-Value Coding framework to access the UIBarButtonItem’s private _view variable, where … Read more

Does UIGestureRecognizer work on a UIWebView?

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From what I have seen, UIWebView does not play well with others. For gesture recognizers, you could try returning YES from: – (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer; I had to be backwards compatible with 3.0 so I ended up doing all the gesture handling with Javascript inside the UIWebView. Not a good solution, but it worked … Read more

UIView animation based on UIPanGestureRecognizer velocity

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The docs say The velocity of the pan gesture, which is expressed in points per second. The velocity is broken into horizontal and vertical components. So I’d say, given you want to move your view xPoints (measured in pt) to let it go off-screen, you could calculate the duration for that movement like so: CGFloat … Read more

Intercepting pan gestures over a UIScrollView breaks scrolling

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OK, I figured it out. I needed to do 2 things to make this work: 1) Attach my own pan recognizer to the scroll view itself, not to another view on top of it. 2) This UIGestureRecognizerDelegate method prevents the goofy behavior that happens when both the default scrollview and my own one are invoked … Read more

Combine longpress gesture and drag gesture together

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UILongPressGestureRecognizer already does what you want for you. Take a look at the UIGestureRecognizerState property. From the documentation: Long-press gestures are continuous. The gesture begins (UIGestureRecognizerStateBegan) when the number of allowable fingers (numberOfTouchesRequired) have been pressed for the specified period (minimumPressDuration) and the touches do not move beyond the allowable range of movement (allowableMovement). The … Read more

UIGestureRecognizer and UITableViewCell issue

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Instead of adding the gesture recognizer to the cell directly, you can add it to the tableview in viewDidLoad. In the didSwipe-Method you can determine the affected IndexPath and cell as follows: -(void)didSwipe:(UIGestureRecognizer *)gestureRecognizer { if (gestureRecognizer.state == UIGestureRecognizerStateEnded) { CGPoint swipeLocation = [gestureRecognizer locationInView:self.tableView]; NSIndexPath *swipedIndexPath = [self.tableView indexPathForRowAtPoint:swipeLocation]; UITableViewCell* swipedCell = [self.tableView cellForRowAtIndexPath:swipedIndexPath]; … Read more

Add UIGestureRecognizer to swipe left to right right to left my views [duplicate]

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UISwipeGestureRecognizer * swipeleft=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeleft:)]; swipeleft.direction=UISwipeGestureRecognizerDirectionLeft; [self.view addGestureRecognizer:swipeleft]; // SwipeRight UISwipeGestureRecognizer * swiperight=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swiperight:)]; swiperight.direction=UISwipeGestureRecognizerDirectionRight; [self.view addGestureRecognizer:swiperight]; // Implement Gesture Methods -(void)swipeleft:(UISwipeGestureRecognizer*)gestureRecognizer { //Do what you want here } -(void)swiperight:(UISwipeGestureRecognizer*)gestureRecognizer { //Do what you want here } Try this one. Here is the swift version of above code. Left Swipe var swipeleft = UISwipeGestureRecognizer(target: … Read more

How do I implement the UITapGestureRecognizer into my application

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This is a step by step guide on how to implement gesture recognizers in your class: Conform your class to UIGestureRecognizerDelegate protocol. Instantiate the gesture recognizer. For example, to instantiate a UITapGestureRecognizer, we will do: UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapFrom:)]; Here, action is the selector which will handle the gesture. Here, our selector … Read more

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