Swift 如何在不继承 AVAudioPlayer 的 class 上使用 AVAudioPlayerDelegate？

Question

class myClass: AVAudioPlayerDelegate{
    var player = AVAudioPlayer()

    init(){
        player.delegate = self
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
          print("The song ended")
    }
}

我正在学习 Swift 并尝试制作音乐播放应用程序。我有一个自定义 class，它有一个名为 player 的 AVAudioPlayer 对象作为它的属性。如何将 AVAudioPlayerDelegate 方法与 player 对象一起使用？

当有这样的代码时，我得到错误：

The type myClass does not conform to the protocol NSObjectProtocol

Answer 1

继承自NSObject。

class myClass: NSObject, AVAudioPlayerDelegate {
    var player = AVAudioPlayer()

    init(){
        player.delegate = self
    }

    func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
          print("The song ended")
    }
}

Swift 如何在不继承 AVAudioPlayer 的 class 上使用 AVAudioPlayerDelegate？

Swift How can I use AVAudioPlayerDelegate on a class that doesn't inherit AVAudioPlayer?

swift

xcode

delegates

avaudioplayer