Question

我需要代码帮助，因为我无法弄清楚为什么我的AVPlayer无法播放音频。这是我的功能：

@IBAction func pausePlayAudio(_ sender: CustomButton) {
    let audioSourceURL: String = "[Site]/module_lesson_uploads/audios/"
    let audioString: String = audioSourceURL + (sender.paramaters["thisAudioURL"] as! String)
    let audioURL = URL(string: audioString)

    print(audioString)

    let playerItem: AVPlayerItem = AVPlayerItem(url: audioURL!)
    let audioPlayer = AVPlayer(playerItem: playerItem)

    audioPlayer.play()
}

在这里被称为

pausePlayButton.addTarget(self, action: #selector(ModuleLessonElementsViewController.pausePlayAudio(_:)), for: .touchUpInside)
pausePlayButton.paramaters["thisAudioURL"] = content

，这将是控制台打印传递的String的结果：

[Site]/module_lesson_uploads/audios/228F0E3-1576580339.mp3
2019-12-19 11:54:34.524954+0800 AppUI[3807:70260] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:54:34.688244+0800 AppUI[3807:70259] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:54:34.718316+0800 AppUI[3807:70261] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:54:34.912438+0800 AppUI[3807:70259] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:54:34.913975+0800 AppUI[3807:70259] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
[Site]/module_lesson_uploads/audios/4AB4136-1576647127.mp3
2019-12-19 11:55:04.511064+0800 AppUI[3807:70259] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:55:04.742723+0800 AppUI[3807:70262] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:55:04.795568+0800 AppUI[3807:70262] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:55:05.042987+0800 AppUI[3807:70262] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection
2019-12-19 11:55:05.049440+0800 AppUI[3807:70262] [] nw_endpoint_flow_copy_multipath_subflow_counts Called on non-Multipath connection

它似乎正在工作，但是音频没有播放。任何帮助或解释将不胜感激！

Answer 1

我检查了您的代码并发现了这种模式：

如果我在audioPlayer之前定义和初始化viewDidLoad-那么audioPlayer在100％的情况下有效（我使用this音频）
如果我为您定义并初始化audioPlayer（在pausePlayAudio）-有时可行，有时不可行。

请检查以下内容：

var audioPlayer = AVPlayer()

@IBAction func pausePlayAudio(_ sender: CustomButton) {
    let audioSourceURL: String = "[Site]/module_lesson_uploads/audios/"
    let audioString: String = audioSourceURL + (sender.paramaters["thisAudioURL"] as! String)
    let audioURL = URL(string: audioString)

    print(audioString)

    let playerItem = AVPlayerItem(url: audioURL!)
    self.audioPlayer = AVPlayer(playerItem: playerItem)

    self.audioPlayer.play()
}

Answer 2

您的错误是您正在为音频播放器创建功能范围实例。它会在执行后立即释放，这就是为什么它不播放。创建audioPlayer对象的类变量，然后执行相同的操作。它一定会工作。另外，当前您的网址来自服务器，因此请等待几秒钟，以接收足够的缓冲区数据来播放。

尽管网址正确，但AVPlayer无法播放

2 个答案: