再次播放按钮不起作用

Question

当我再次按下播放按钮时，它不起作用。我刚刚有这个代码涉及播放再次按钮。我应该在这里添加什么？如何向playAgain按钮添加功能？这是我的代码：

  let playAgain: UIButton = UIButton(frame: CGRectMake(-10, 400, 400, 150))
   playAgain.setTitle("Play Again", forState: UIControlState.Normal)
   playAgain.titleLabel!.font = UIFont(name: "Helvetica", size: 50)
     playAgain.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
            playAgain.tag = 1
            self.view!.addSubview(playAgain)

Answer 1

使用您喜欢的任何名称实现一个函数，如下所示：

func buttonPressed(sender: UIButton) {
    // do something
}

然后将此功能设置为按钮的操作：

playAgain.addTarget(self, action: "buttonPressed:", forControlEvents: .TouchUpInside)