ScrollView gesture recognizer eating all touch events

Question

I have a UIScrollView to which I added a single tap gesture recognizer to show/hide some UI overlay using:

UITapGestureRecognizer *singleTap = [         


        

Answer 1

I think the reason is that User Interaction Enabled is set to false for UIImageView. You should set it to true to enable tapping in it

Answer 2

TapGestures worked for me. The swipe on the other hand, I had to disable the scrolling and it worked.

swipeLeftGesture = UISwipeGestureRecognizer(target: self, action: #selector(swipeToNewImage(_:)))
swipeLeftGesture.direction = .left
scrollView.addGestureRecognizer(swipeLeftGesture)

swipeRightGesture = UISwipeGestureRecognizer(target: self, action: #selector(swipeToNewImage(_:)))
scrollView.addGestureRecognizer(swipeRightGesture)

scrollView.isScrollEnabled = false

Answer 3

My code.

I checked all proposed solutions and any work for me. I do not understand why. I do not understand the reason.

class MyClass: UITableViewController {

override func viewDidLoad() {
    super.viewDidLoad()

let scrollView = UIScrollView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.size.width, height: UIScreen.main.bounds.size.height))

scrollView.contentSize = CGSize(width: UIScreen.main.bounds.size.width, height: 800)

scrollView.isUserInteractionEnabled = true
scrollView.delegate = self

let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(manageGesture))

tap.cancelsTouchesInView = false

tap.numberOfTapsRequired = 1

scrollView.addGestureRecognizer(tap)

scrollView.canCancelContentTouches = false

self.view.addSubview(scrollView)

}

@objc func manageGesture(){
    // Some action
}


}

Answer 4

Thanks @zambrey

Swift 2.2+ Version:

scrollView.delegate = self

let allowMultipleTouches = UITapGestureRecognizer(target: self, action: #selector(genderPressed))
allowMultipleTouches.numberOfTapsRequired = 1
allowMultipleTouches.cancelsTouchesInView = false

scrollView.addGestureRecognizer(allowMultipleTouches)

If your scroll view is in the Storyboard, don't forget to pin the Outlet in the view controller. In this example, scrollView is the Outlet of the UIScrollView.

Answer 5

You can capture any kind of gestures in the UIscrollView. Make sure you also handle some of the default properties as well like set cancelsTouchesInView property to false, it is true by default. Also give some tag nos to your sub views to distinguish in selectors. & also enable their User interaction to true.

let tap = UITapGestureRecognizer(target: self, action:

selector(didTapByUser(_:)))

Answer 6

You can set which objects are to be included/excluded for touches.

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gesture shouldReceiveTouch:(UITouch *)touch {            
   if (touch.view == [self view]) {
       return YES;
   }
   return NO;
}