ios - swift : Hide button in subview

Question

我试图在触发函数时在 subview 中隐藏 UIButton。 我对该层次结构有多个 View :

  var takePhotoButton : UIButton = UIButton.buttonWithType(UIButtonType.System) as UIButton

        takePhotoButton.addTarget(self, action:"takePhoto", forControlEvents:UIControlEvents.TouchUpInside)


        var savePhotoButton : UIButton = UIButton.buttonWithType(UIButtonType.System) as UIButton


        let view2:UIView = UIView(frame: CGRectMake(0, 0, 320, 568))


        self.view.addSubview(photoMask)
        photoMask.addSubview(view2)
        view2.addSubview(takePhotoButton)

我想在触发以下函数时隐藏 takePhotoButton，我该怎么做？

     func takePhoto(takePhotoButton: UIButton!) {
   takePhotoButton.hidden = true
   }

Answer 1

如果要保留对 UIButton 的引用，则必须使 UIButton 成为该类的属性。然后您可以使用 self.takePhotoButton 访问它。