ios - 如何用文本框和按钮更改一段Url？(Swift 2)

Question

这是我的代码，但它的输出为零。

    import AVFoundation
    import AVKit
    import UIKit
    var userName :String?
    class ViewController: UIViewController {
         var movieUrl:NSURL? = NSURL(string: "http://streamapp.ir:1935/lahzenegar/\(userName)/playlist.m3u8")
         @IBOutlet var inpt: UITextField!
         @IBOutlet var scView: UIScrollView!
         let avPlayerViewController = AVPlayerViewController()
         var avPlayer: AVPlayer?
   override func viewDidLoad() {
   super.viewDidLoad()
  }

和我的按钮代码:

   @IBAction func playButtonTapped3(sender: UIButton) {

    userName = "\(self.inpt.text)"
    self.presentViewController(self.avPlayerViewController, animated: true) { () -> Void in
        self.avPlayerViewController.player?.play()
    }
    print(movieUrl)
}

所以我想当按下按钮(用户名)时将值更改为用户在文本框中输入的任何内容

already output:

感谢帮助

Answer 1

首次创建 movieURL 时，未设置 userName。这很好，但是，当您按下按钮时，您需要更新 movieURL 以及用户名。像这样的事情:

userName = "\(self.inpt.text)"
movieURL = NSURL(string: "http://streamapp.ir:1935/lahzenegar/\(userName)/playlist.m3u8")