ios - 如何通过触摸按钮重复功能

我正在使用Swift 2.1开发Xcode7
我的代码有问题。我正在执行随机功能，当我触摸按钮时，它会自动向您显示随机电影。

但是问题是我想让我在触摸按钮时重复该功能，因为当我触摸按钮时，什么也没发生。

这是代码：

   class ViewController: UIViewController {
   var random = arc4random_uniform(3)

@IBOutlet weak var NomDuFilm: UILabel!
@IBOutlet weak var ImageFilm: UIImageView!

@IBAction func ShowRandom(sender: AnyObject) {

    switch random {
      case 0:

        self.ImageFilm.image = UIImage(named: "Inception.jpg")
        NomDuFilm.text = "Inception"
        NomDuFilm.hidden = false

      case 1:
        self.ImageFilm.image = UIImage(named: "Memento.jpg")
        NomDuFilm.text = "Memento"
        NomDuFilm.hidden = false

      case 2:
        self.ImageFilm.image = UIImage(named: "ShutterIsland.jpg")
        NomDuFilm.text = "Shutter Island"
        NomDuFilm.hidden = false

      case 3:
        self.ImageFilm.image = UIImage(named: "Prisoners.jpg")
        NomDuFilm.text = "Prisoners"
        NomDuFilm.hidden = false

      case 4:
        self.ImageFilm.image = UIImage(named: "LePrestige.jpg")
        NomDuFilm.text = "Le Prestige"
        NomDuFilm.hidden = false

      default:
        self.ImageFilm.image = UIImage(named: "PulpFiction.png")
        NomDuFilm.text = "Pulp Fiction"
        NomDuFilm.hidden = false

       }

谢谢您的帮助，也很抱歉我的英语水平...

最佳答案

您是否在行动通话中添加了随机通话？

@IBAction func ShowRandom(sender: AnyObject) {
   random = arc4random_uniform(3)

 //switch goes here.
}