如何获取当前曲目并在CPNowPlayingTemplate中配置显示曲目信息？

要让CPNowPlayingTemplate正确显示曲目信息，核心是通过MPNowPlayingInfoCenter传递数据，同时配合播放逻辑调整，以下是具体修改和说明：

1. 正确填充MPNowPlayingInfoCenter的曲目数据 #

CPNowPlayingTemplate会自动读取MPNowPlayingInfoCenter.default().nowPlayingInfo中的数据，你需要把硬编码的测试值替换为真实播客数据，还可补充更多字段让界面更完整：

var nowPlayingInfo = [String: Any]()
// 替换为真实的播客标题和作者
nowPlayingInfo[MPMediaItemPropertyTitle] = podcast.name
nowPlayingInfo[MPMediaItemPropertyArtist] = podcast.author // 假设你的podcast模型有author字段
// 可选：添加时长信息（如果有）
if let duration = podcast.duration {
    nowPlayingInfo[MPMediaItemPropertyPlaybackDuration] = duration
}
// 可选：添加专辑封面（需要转换为MPMediaItemArtwork）
if let imageURL = podcast.imageURL, let imageData = try? Data(contentsOf: imageURL), let image = UIImage(data: imageData) {
    nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { size in
        return image
    }
}
MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo

2. 调整播放逻辑与模板推送的顺序 #

建议先设置好曲目信息、准备好播放队列，再推送CPNowPlayingTemplate，避免界面加载时信息为空：

itemLista.handler = { [weak self] item, completion in
    guard let this = self else { return }
    
    // 1. 先设置曲目信息
    var nowPlayingInfo = [String: Any]()
    nowPlayingInfo[MPMediaItemPropertyTitle] = podcast.name
    nowPlayingInfo[MPMediaItemPropertyArtist] = podcast.author
    MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
    
    // 2. 准备播放队列并开始播放
    this.playWithItems(items: [podcast.identifier!])
    
    // 3. 推送NowPlaying模板
    let nowPlayingTemplate = CPNowPlayingTemplate.shared
    this.interfaceController?.pushTemplate(nowPlayingTemplate, animated: true, completion: nil)
    
    completion()
}

3. CPNowPlayingTemplate的额外注意事项 #

• CPNowPlayingTemplate.shared是单例，无需重复调用add(this)，直接使用即可
• 如果需要自定义NowPlaying界面布局，可以创建自定义的CPNowPlayingTemplate子类，或通过nowPlayingTemplate.controls添加自定义控件，默认模板已自动展示MPNowPlayingInfoCenter中的核心信息

修改后的完整代码示例 #

itemLista = CPListItem(text: podcast.name, detailText: podcast.date)
itemLista.handler = { [weak self] item, completion in
    guard let this = self else { return }
    
    // 填充真实的曲目信息
    var nowPlayingInfo = [String: Any]()
    nowPlayingInfo[MPMediaItemPropertyTitle] = podcast.name
    nowPlayingInfo[MPMediaItemPropertyArtist] = podcast.author ?? "未知作者"
    if let duration = podcast.duration {
        nowPlayingInfo[MPMediaItemPropertyPlaybackDuration] = duration
    }
    MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
    
    // 启动播放
    this.playWithItems(items: [podcast.identifier!])
    
    // 推送NowPlaying模板
    let nowPlayingTemplate = CPNowPlayingTemplate.shared
    this.interfaceController?.pushTemplate(nowPlayingTemplate, animated: true, completion: nil)
    
    completion()
}

func playWithItems(items: [String]) {
    let player = MPMusicPlayerController.applicationQueuePlayer
    player.pause()
    player.setQueue(with: items)
    player.prepareToPlay()
    player.play()
}

内容的提问来源于stack exchange，提问作者user20459409