Swift, evento di tocco UIView nel controller

Question

Come è possibile aggiungere l'azione touchbegin UIView o l'azione touchend programmaticamente come Xcode non fornisce da Main.storyboard?

Answer 1

Dovrai aggiungerlo tramite codice. Prova questo:

// 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

mettere questo nel vostro UIView sottoclasse (è più facile se si effettua una sublcass per questa funzionalità).

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

Aggiornamento @ risposta di Chackle per 2.x Swift:

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

Solo un aggiornamento di risposte di cui sopra:

Se si desidera avere vedere i cambiamenti nel l'evento click, vale a dire Il colore del tuo cambio UIVIew cambia ogni volta che l'utente fa clic su UIView, quindi apporta le modifiche come segue ...

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 

Inoltre, chiamare questa classe da Storyboard & ViewController come:

@IBOutlet weak var panVerificationUIView:ClickableUIView! 

Answer 5

Aggiornamento @ risposta di Crashalot per 3.x Swift:

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

Aggiornamento per Swift 4:

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

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

Aggiornamento per 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

per SWIFT 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") 
}