ios - How to move objects on screen? -


i have multiple lines. want hold 1 line finger , drag around screen. how can possibly using long press?

override func touchesbegan(_ touches: set<uitouch>, event: uievent?) {     if let touch = touches.first      {         let currentpoint = touch.location(in: self.view)         drawline(frompoint: currentpoint, topoint: currentpoint)     } } func drawline(frompoint: cgpoint, topoint: cgpoint) {     uigraphicsbeginimagecontext(self.view.frame.size)     imageview.image?.draw(in: cgrect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height))     let context = uigraphicsgetcurrentcontext()     let linewidth : cgfloat = 5     context?.move(to: cgpoint(x: frompoint.x, y: frompoint.y))     context?.addline(to: cgpoint(x: frompoint.x + 200, y: frompoint.y))     context?.setblendmode(cgblendmode.normal)     context?.setlinecap(cglinecap.round)     context?.setlinewidth(linewidth)     context?.setstrokecolor(uicolor(red: 0, green: 0, blue: 0, alpha: 1.0).cgcolor)     context?.strokepath()     imageview.image = uigraphicsgetimagefromcurrentimagecontext()     uigraphicsendimagecontext() }

enter image description here

for example, hold line 2 , want drag it. how can that?


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