iOS multi-touch and gesture recognition

1Click-UITapGestureRecognizer

    override func viewdidload ()  {         super.viewdidload ()                         let rect=cgrect (x:80,y:200,width:200,height:200);         var view1 = uiview (Frame: rect)          view1.backgroundcolor = uicolor.redcolor ()          self.view.addsubview (View1)                  //1, creating gesture recognizers          var gesture = uitapgesturerecognizer (target: self, action:  "viewAction:") # warning  If you want the recognizer to recognize a variety of touches, such as 1 points and 2 points, build 2 uitapgesturerecognizer         gesture.numberoftapsrequired = 2    //clicks        //  gesture.numberoftouchesrequired = 2 //Multi-Touch                  //2, associating recognizers to views          View1.addgesturerecognizer (gesture)             }     //3, gesture-referenced action     func viewaction (Sender:uitapgesturerecognizer) {        //Gets the location at the click         var  point:cgpoint = sender.locationinview (Self.view)          println ("\ (point)")         println ("clicked")      }

2,Zoom in and zoom Uipinchgesturerecognizer

    override func viewdidload ()  {         super.viewdidload ()                  //1, creating gesture recognizers         var gesture =  Uipinchgesturerecognizer (target: self, action:  "viewaction:")                  //2, associating recognizers to views          view1.addgesturerecognizer (gesture)              }    //3, gesture-referenced action     func viewaction (sender: UITapGestureRecognizer) {                 var _height = view1.bounds.height         Var _width  = view1.bounds.width                View1.bounds.size = cgsize (width: _width * sender.scale,                                           Height: _height * sender.scale)     }

iOS multi-touch and gesture recognition