如何减少 AVplayer 中循环音频播放的延迟 - ios swift

Question

我在项目文件夹中有一个 mp3 文件，它会反复播放，但播放器在播放完 mp3 时会出现延迟。此延迟约为 1 秒。如何减少延迟并不断重播？我使用了循环数，但没有帮助。代码如下：

DispatchQueue.main.async
        {
            guard let url = Bundle.main.url(forResource: "finalbreathin", withExtension: "mp3") else { return }

            do {
                try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
                try AVAudioSession.sharedInstance().setActive(true)



                /* The following line is required for the player to work on iOS 11. Change the file type accordingly*/
                self.player = try AVAudioPlayer(contentsOf: url)

                //iOS 10 and earlier require the following line:
                self.player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileType.mp3.rawValue)

                guard let player = self.player else { return }
                player.numberOfLoops = -1
                self.imageanimate.startAnimating()
                player.play()

            } catch let error {
                print(error.localizedDescription)
            }

    }

Answer 1

我认为重播延迟是每个循环声明的主要原因

try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
try AVAudioSession.sharedInstance().setActive(true)

所以将这两行移出循环或 AppDelegate 在 application:didFinishLaunchingWithOptions: 方法中，将应用的音频会话类别设置为 AVAudioSessionCategoryPlayback。 查看更多详情 -> https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/MediaPlaybackGuide/Contents/Resources/en.lproj/GettingStarted/GettingStarted.html