Swift, UIView zdarzenie dotykowe w kontrolerze

Question

Jak mogę dodać akcję UIView touchbegin lub touchend programowo, ponieważ Xcode nie dostarcza z Main.storyboard?

Answer 1

Będziesz musiał dodać to za pomocą kodu. Spróbuj tego:

// 1.create UIView programmetically 
    var myView = UIView(frame: CGRectMake(100, 100, 100, 100)) 
    // 2.add myView to UIView hierarchy 
    self.view.addSubview(myView) 
    // 3. add action to myView 
    let gesture = UITapGestureRecognizer(target: self, action: "someAction:") 
    // or for swift 2 + 
    let gestureSwift2AndHigher = UITapGestureRecognizer(target: self, action: #selector (self.someAction (_:))) 
    self.myView.addGestureRecognizer(gesture) 

    func someAction(sender:UITapGestureRecognizer){  
     // do other task 
    } 

    // or for Swift 3 
    func someAction(_ sender:UITapGestureRecognizer){  
     // do other task 
    } 

Answer 2

umieścić to w swoim UIView podklasy (najłatwiej jeśli popełnisz sublcass dla tej funkcji).

class YourView: UIView { 

    //Define your initialisers here 

    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) { 
    if let touch = touches.first as? UITouch { 
     let currentPoint = touch.locationInView(self) 
     // do something with your currentPoint 
    } 
    } 

    override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) { 
    if let touch = touches.first as? UITouch { 
     let currentPoint = touch.locationInView(self) 
     // do something with your currentPoint 
    } 
    } 

    override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) { 
    if let touch = touches.first as? UITouch { 
     let currentPoint = touch.locationInView(self) 
     // do something with your currentPoint 
    } 
    } 
} 

Answer 3

Aktualizacja @ odpowiedź Chackle za Swift 2.x:

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 
    if let touch = touches.first { 
     let currentPoint = touch.locationInView(self) 
     // do something with your currentPoint 
    } 
} 

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) { 
    if let touch = touches.first { 
     let currentPoint = touch.locationInView(self) 
     // do something with your currentPoint 
    } 
} 

override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) { 
    if let touch = touches.first { 
     let currentPoint = touch.locationInView(self) 
     // do something with your currentPoint 
    } 
} 

Answer 4

Wystarczy aktualizację powyższych odpowiedzi:

Jeśli chcesz mieć zobaczyć zmiany w zdarzenia click, czyli Kolor zmiany UIVIew shud za każdym razem, gdy użytkownik kliknie UIView, a następnie wprowadź zmiany, jak poniżej ...

class ClickableUIView: UIView { 
    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 
      if let touch = touches.first { 
       let currentPoint = touch.locationInView(self) 
       // do something with your currentPoint 
      } 

      self.backgroundColor = UIColor.magentaColor()//Color when UIView is clicked. 
     } 

     override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) { 
      if let touch = touches.first { 
       let currentPoint = touch.locationInView(self) 
       // do something with your currentPoint 
      } 

      self.backgroundColor = UIColor.magentaColor()//Color when UIView is clicked. 
     } 

     override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) { 
      if let touch = touches.first { 
       let currentPoint = touch.locationInView(self) 
       // do something with your currentPoint 
      } 

      self.backgroundColor = UIColor.whiteColor()//Color when UIView is not clicked. 

}//class closes here 

także wywołać tę klasę z Storyboard & ViewController jak:

@IBOutlet weak var panVerificationUIView:ClickableUIView! 

Answer 5

Aktualizacja @ odpowiedź Crashalot za Swift 3.x:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 
    if let touch = touches.first { 
     let currentPoint = touch.location(in: self) 
     // do something with your currentPoint 
    } 
} 

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) { 
    if let touch = touches.first { 
     let currentPoint = touch.location(in: self) 
     // do something with your currentPoint 
    } 
} 

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) { 
    if let touch = touches.first { 
     let currentPoint = touch.location(in: self) 
     // do something with your currentPoint 
    } 
} 

Answer 6

Aktualizacja dla Swift 4:

let gesture = UITapGestureRecognizer(target: self, action: #selector(self.checkAction)) 
self.myView.addGestureRecognizer(gesture) 

@objc func checkAction(sender : UITapGestureRecognizer) { 
    // Do what you want 
} 

Aktualizacja dla Swift 3:

let gesture = UITapGestureRecognizer(target: self, action: #selector(self.checkAction(sender:))) 
self.myView.addGestureRecognizer(gesture) 

func checkAction(sender : UITapGestureRecognizer) { 
    // Do what you want 
} 

Answer 7

Dla szybkiej 4

@IBOutlet weak var someView: UIView! 
let gesture = UITapGestureRecognizer(target: self, action: #selector (self.someAction (_:))) 
self.someView.addGestureRecognizer(gesture) 

@objc func someAction(_ sender:UITapGestureRecognizer){ 
    print("view was clicked") 
}