AVAudioPlayer 不会在关闭屏幕上停止播放

如何解决AVAudioPlayer 不会在关闭屏幕上停止播放

我正在尝试使用 SwiftUI 创建一个类似于 Apple Music 的音乐播放器应用程序。

这是我在屏幕底部设置小矩形迷你播放器的代码：

struct MiniPlayer: View {
    
    let mediaItem : MPMediaItem
    @State private var audioPlayer : AudioPlayer = AudioPlayer()
    @State private var errorString : String?
    @State private var showAlert : Bool = false
    @State private var isPlaying : Bool = true
    
    var body: some View {
        ZStack {
            VStack(alignment: .leading,spacing: 3){
                HStack(spacing: 10){
                    SongsListingRow(mediaItem: mediaItem)
                    Spacer()
                    Button(action: {
                        isPlaying.toggle()
                        isPlaying ? audioPlayer.play() : audioPlayer.pause()
                    },label: {
                        Image(systemName: isPlaying ? "pause.fill" : "play.fill")
                            .foregroundColor(Color.black)
                    })
                }
                .padding(.horizontal,10)
                ProgressView(value: 0.5)
            }
            .alert(isPresented: $showAlert,content: {
                Alert(title: Text("Alert"),message: Text(errorString ?? "Something went wrong"),dismissButton: .default(Text("Okay")))
            })
        }
        .onAppear{
            reconfigurePlayer(mediaItem)
        }
        .onChange(of: mediaItem) { value in
            reconfigurePlayer(value)
        }
        .onDisappear{
//            audioPlayer.clean()
        }
    }
    
    private func reconfigurePlayer(_ mediaItem : MPMediaItem){
        
        if let url = mediaItem.assetURL{
            errorString = self.audioPlayer.configure(url: url)
            showAlert = errorString != nil
        }else{
            showAlert = true
        }
    }
}

还有 AudioPlayer 类：

class AudioPlayer{
    
    private var audioPlayer : AVAudioPlayer?
    
    func configure(url : URL) -> String?{
        
        do{
            try AVAudioSession.sharedInstance().setCategory(.playback)
            self.audioPlayer = try AVAudioPlayer(contentsOf: url)
            audioPlayer?.prepareToPlay()
            audioPlayer?.volume = 0.3
            self.play()
            return nil
        }catch{
            return error.localizedDescription
        }
    }

    ...
}

以及显示 MiniPlayer 的列表：

struct SongsListing: View {
    
    ...
    
    var body: some View {
        VStack(spacing: 0) {
            List{
                TextField("Type your search",text: $searchText)
                    .textFieldStyle(RoundedBorderTextFieldStyle())
                
                ForEach(songs,id: \.persistentID){ mediaItem in
                    Button(action: {
                        self.selectedItem = mediaItem
                    },label: {
                        SongsListingRow(mediaItem: mediaItem)
                    })
                }
            }
            .navigationTitle("Songs")
            
            if selectedItem != nil{
                ZStack{
                    Color.white
                        .shadow(radius: 2.0)
                    MiniPlayer(mediaItem: selectedItem!)
                }
                .frame(height: 60.0)
            }
        }
    }
}

所以流程是屏幕 A > SongsListing。点按行项目会在屏幕底部显示 MiniPlayer。

我的问题是：

当我从 SongsListing 返回到屏幕 A 时，AVAudioPlayer 不会自行停止播放。不应该从视图控制器中弹出来取消实例化 AudioPlayer 类并扩展 AVAudioPlayer 吗？