注意：请将VideoQuality枚举案例和URL替换为您的实际URL和质量定义。

import AVFoundation
    
    // This is just an example enum representing video quality levels
    enum VideoQuality: String {
        case sd480p
        case hd720p
        case hd1080p
        
        var playlistURL: String {
            return "\(rawValue)/playlist.m3u8"
        }
    }
    
    // This mapping relates video quality to its associated audio group ID
    var qualityToAudioMapping: [VideoQuality: String] = [
        .sd480p: "audio",
        .hd720p: "audio",
        .hd1080p: "audio"
    ]
    
    // User selects a video quality
    let selectedQuality: VideoQuality = .hd720p
    
    // Get the corresponding audio group ID
    guard let audioGroupID = qualityToAudioMapping[selectedQuality] else {
        fatalError("No audio group associated with the selected quality")
    }
    
    // Create AVPlayerItem for the selected video quality
    let videoURL = URL(string: selectedQuality.playlistURL)!
    let playerItem = AVPlayerItem(url: videoURL)
    
    // Select the appropriate audio track
    if let audioSelectionGroup = playerItem.asset.mediaSelectionGroup(forMediaCharacteristic: .audible) {
        for option in audioSelectionGroup.options {
            if option.identifier?.rawValue == audioGroupID {
                playerItem.select(option, in: audioSelectionGroup)
                break
            }
        }
    }
    
    // Create AVPlayer with the configured AVPlayerItem
    let player = AVPlayer(playerItem: playerItem)
    
    // Present or play the player as needed
    // For example, using AVPlayerViewController
    let playerViewController = AVPlayerViewController()
    playerViewController.player = player
    present(playerViewController, animated: true) {
        player.play()
    }