＆＃34; touchesBegan＆＃34;出错

Question

我的代码：

var location = CGPoint(x:0,y:0) 
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 
    let touch = touches.anyObject() as? UITouch 
    location = touch.locationInView(self.view) 
    Button.center = location 
}

在这一行上出错：

let touch = touches.anyObject() as? UITouch 

如何解决？

Answer 1

Try this : - 

  override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {

    for touch in touches {
    if let touch = touches.first as? UITouch {
                           if touch.tapCount == 2{
                                //Do Something here
                            }
                                             }
                          }
        }

Answer 2

试试这个

if let touch = touches.first as? UITouch
{
}