Ios AudioPlayerDifinishPlaying的使用

就在我点击播放按钮的那一刻，我看到了结束，而不是声音播放完毕。我肯定我做错了什么。如何修复它？

从play方法中删除以下语句

让hastheplayerdrended=audioplayerddinishplaying_u:player，successfully:true在这里调用函数audioplayerddinishplaying并成功传递：true作为参数，该参数在播放器播放时立即停止播放。

 class ViewController: UIViewController, AVAudioPlayerDelegate {    
 func audioPlayerDidFinishPlaying (_ player:AVAudioPlayer, successfully flag: Bool) {
    endcheck.text = "end"

}

@IBAction func play(_ sender: Any) {
    do
    {
        let url = Bundle.main.path (forResource: String(myIndex), ofType: "mp3")
        try player = AVAudioPlayer (contentsOf: NSURL(fileURLWithPath: url!) as URL)
    }
    catch{
    }

    player.play()


    let hasThePlayerEnded = audioPlayerDidFinishPlaying(_:player, successfully:true)

}
    super.viewDidLoad()
   self.player.delegate = self

}

let hasThePlayerEnded = audioPlayerDidFinishPlaying(_:player, successfully:true)