UIVIEWのエッジでタッチを検出する

Question

iOS Swiftのビューのエッジまたは境界のタッチを検出する方法。ユーザーがUIViewの境界線をドラッグしたときにUIViewの幅と高さを増やしたい。

Answer 1

溶液を得た。How to resize UIView by dragging from its edges?溶液。

スウィフトのバージョンとあなたは以下のSOスレッドを見てみたいことがありますエッジだけでなく、コーナー

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 

     } 
    }