Touch an der Kante des UIVIEW erkennen

Question

So erkennen Sie die Berührung auf der Kante oder am Rand der Ansicht in iOS Swift. Ich möchte UIView Breite und Höhe erhöhen, wenn der Benutzer den Rahmen der UIView zieht.

Answer 1

haben die Lösung How to resize UIView by dragging from its edges? Lösung gelöst.

Swift Version und Code Kanten zu erkennen sowie Ecken

class OverlayView: UIView { 

    /* 
    // Only override draw() if you perform custom drawing. 
    // An empty implementation adversely affects performance during animation. 
    override func draw(_ rect: CGRect) { 
     // Drawing code 
    } 
    */ 


    static var kResizeThumbSize:CGFloat = 44.0 
    private typealias `Self` = OverlayView 

    var imageView = UIImageView() 

    var isResizingLeftEdge:Bool = false 
    var isResizingRightEdge:Bool = false 
    var isResizingTopEdge:Bool = false 
    var isResizingBottomEdge:Bool = false 

    var isResizingBottomRightCorner:Bool = false 
    var isResizingLeftCorner:Bool = false 
    var isResizingRightCorner:Bool = false 
    var isResizingBottomLeftCorner:Bool = false 


     //Define your initialisers here 

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

      isResizingBottomRightCorner = (self.bounds.size.width - currentPoint.x < Self.kResizeThumbSize && self.bounds.size.height - currentPoint.y < Self.kResizeThumbSize); 
      isResizingLeftCorner = (currentPoint.x < Self.kResizeThumbSize && currentPoint.y < Self.kResizeThumbSize); 
      isResizingRightCorner = (self.bounds.size.width-currentPoint.x < Self.kResizeThumbSize && currentPoint.y < Self.kResizeThumbSize); 
      isResizingBottomLeftCorner = (currentPoint.x < Self.kResizeThumbSize && self.bounds.size.height - currentPoint.y < Self.kResizeThumbSize); 

      isResizingLeftEdge = (currentPoint.x < Self.kResizeThumbSize) 
      isResizingTopEdge = (currentPoint.y < Self.kResizeThumbSize) 
      isResizingRightEdge = (self.bounds.size.width - currentPoint.x < Self.kResizeThumbSize) 

      isResizingBottomEdge = (self.bounds.size.height - currentPoint.y < Self.kResizeThumbSize) 

      // 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 


      isResizingLeftEdge = false 
      isResizingRightEdge = false 
      isResizingTopEdge = false 
      isResizingBottomEdge = false 

      isResizingBottomRightCorner = false 
      isResizingLeftCorner = false 
      isResizingRightCorner = false 
      isResizingBottomLeftCorner = false 

     } 
    }