ios - 为什么按钮开关不起作用？

Question

我创建了一个按钮开关盒。按钮被按下，图像被添加到 subview ，当按钮被再次点击时，它会将它从 super View 中删除，如果它被再次点击，它会再次添加它们，等等。

        var buttonState: Int = 0;

        func addfriend(sender: UIButton){
        switch(buttonState){
            case 0:
                self.view.addSubview(cameramethod)
                self.view.addSubview(searchmethod)
                self.view.addSubview(nearbymethod)
                buttonState = 1;
         break;

            case 1:
                cameramethod.removeFromSuperview()
                searchmethod.removeFromSuperview()
                nearbymethod.removeFromSuperview()

               default: break;
        }





}

Answer 1

你想要这样吗？

func addfriend(sender: UIButton){
        switch(buttonState){
            case 0:
                self.view.addSubview(cameramethod)
                self.view.addSubview(searchmethod)
                self.view.addSubview(nearbymethod)
                buttonState = 1;
            break;

            case 1:
                cameramethod.removeFromSuperview()
                searchmethod.removeFromSuperview()
                nearbymethod.removeFromSuperview()
                buttonState = 0;
            break;

            default: break;
        }

}