コントローラーのUIViewタッチイベント

Question 1

XcodeがMain.storyboardから提供していないため、UIViewのtouchbeginアクションまたはtouchendアクションをプログラムで追加するにはどうすればよいですか？

Question 2

コードで追加する必要があります。これを試して：

    // 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
    }

    // or for Swift 4
    @objc func someAction(_ sender:UITapGestureRecognizer){     
       // do other task
    }

    // update for Swift UI

    Text("Tap me!")
        .tapAction {
             print("Tapped!")
        }

Question 3

Swift 4/5：

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

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

スウィフト3：

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

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

Question 4

Swift 3.xに対する@Crashalotの回答の更新：

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
    }
}

Question 5

Swift 2.xに対する@Chackleの回答の更新：

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
    }
}

Question 6

これをUIViewサブクラスに配置します（この機能のサブクラスを作成するのが最も簡単です）。

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
    }
  }
}

Question 7

Swift 4の場合

@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")
}

Question 8

Swift 4.2：

@IBOutlet weak var viewLabel1: UIView!
@IBOutlet weak var viewLabel2: UIView!
  override func viewDidLoad() {
    super.viewDidLoad()

    let myView = UITapGestureRecognizer(target: self, action: #selector(someAction(_:)))
    self.viewLabel1.addGestureRecognizer(myView)
}

 @objc func someAction(_ sender:UITapGestureRecognizer){
   viewLabel2.isHidden = true
 }

Question 9

StoryBoardで作成されたビューからアウトレットを作成します。

@IBOutlet weak var redView: UIView!
@IBOutlet weak var orangeView: UIView!
@IBOutlet weak var greenView: UIView!

touchesBeganメソッドをオーバーライドします。2つのオプションがあり、誰もがどちらが彼に適しているかを判断できます。

特別なビューでタッチを検出します。

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
     if let touch = touches.first {
        if touch.view == self.redView {
            tapOnredViewTapped()
        } else if touch.view == self.orangeView {
            orangeViewTapped()
        } else if touch.view == self.greenView {
            greenViewTapped()
        } else {
            return
        }
    }

}

特別なビューでタッチポイントを検出します。

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    if let touch = touches.first {
        let location = touch.location(in: view)
        if redView.frame.contains(location) {
            redViewTapped()
        } else if orangeView.frame.contains(location) {
            orangeViewTapped()
        } else if greenView.frame.contains(location) {
            greenViewTapped()
        }
    }

}

最後に、ユーザーがクリックしたビューに応じて、呼び出される関数を宣言する必要があります。

func redViewTapped() {
    print("redViewTapped")
}

func orangeViewTapped() {
    print("orangeViewTapped")
}

func greenViewTapped() {
    print("greenViewTapped")
}

Question 10

このように使用できます：拡張機能を作成します

extension UIView {

    func addTapGesture(action : @escaping ()->Void ){
        let tap = MyTapGestureRecognizer(target: self , action: #selector(self.handleTap(_:)))
        tap.action = action
        tap.numberOfTapsRequired = 1

        self.addGestureRecognizer(tap)
        self.isUserInteractionEnabled = true

    }
    @objc func handleTap(_ sender: MyTapGestureRecognizer) {
        sender.action!()
    }
}

class MyTapGestureRecognizer: UITapGestureRecognizer {
    var action : (()->Void)? = nil
}

このように使用します：

@IBOutlet weak var testView: UIView!
testView.addTapGesture{
   // ...
}

Question 11

上記の回答の更新のみ：

クリックイベントで変更を確認する場合、つまりユーザーがUIViewをクリックするたびにUIVIew shudの色が変更される場合は、以下のように変更します...

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

また、このクラスをStoryboard＆ViewControllerから次のように呼び出します。

@IBOutlet weak var panVerificationUIView:ClickableUIView!

Question 12

Swift 4.xの@ stevo.mitの回答を更新：

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