觸摸位置使用按鈕swift 3

Question

我有一個大按鈕，當用戶點擊我想找到他們的手指的位置。我熟悉從TouchesBegan方法中使用UITouches找到水龍頭的位置。有沒有辦法從UIButton獲取位置？

我的代碼：

@IBAction func buttonPressed(_ sender: UIButton) { 

    //Find touch location here 

} 

Answer 1

你需要繼承的UIButton並使用touchesBegan你可以觸摸相對於按鍵本身的位置或相對於上海華

class TouchReporterButton: UIButton { 

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

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 
     super.touchesBegan(touches, with: event) 
     let touch = touches.first 

     let location = touch?.location(in: self.superview); 
     if(location != nil) 
     { 
      //Do what you need with the location 
     } 
    } 

} 

希望這有助於