CODEWITHSUNDEEP
iosswift
Raju
Raju

Reputation: 250

Swift : UIPanGestureRecognizer delegate method not called

I am facing some weird issue, here is my code for registering pan gesture

    public func registerGesture(_ view: UIView) {

        self.gesture = UIPanGestureRecognizer(target: self, action: #selector(handleGesture(_:)))
        self.gesture?.minimumNumberOfTouches = 1
        self.gesture?.maximumNumberOfTouches = 1
        self.gesture?.delegate = self

        view.addGestureRecognizer(self.gesture!)
}

UIPanGestureRecognizer delegate method is not get called. 

extension PanGestureHandler : UIGestureRecognizerDelegate {

   public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
      guard let g = self.gesture else { return false }
      guard g.view is UIScrollView else { return false }
      return true
}

   public func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldBeRequiredToFailBy
    otherGestureRecognizer: UIGestureRecognizer) -> Bool {
       return false
}

}

Instead, if i debug the code and print the line self.gesture.delegate, then the delegate method is getting called.

Every time i need to print the above line to work. Please help me, thanks

Upvotes: 1

Views: 1921

Answers (1)

Raju
Raju

Reputation: 250

For the above issue, i have fixed by adding below sharedinstace,

   static let sharedInstance : PanGestureHandler = {
    let instance = PanGestureHandler()
    return instance
    }()

And registering the pangesture for view by,

    let gestureInstance = PanGestureHandler.sharedInstance
    gestureInstance.registerGesture(self.view)

Upvotes: 1

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