如何在使用 AVPlayer 从数组中选择后播放下一首曲目

How to make play the next track after selected from array with AVPlayer

我想制作一个音频播放器。我从设备的本地目录中获取曲目,并将它们放入类型为 [AVPlayerItem] 的数组“playerQueue”中。 TableView 是用多行轨道创建的。我想点击任何行,曲目应该播放 - 它有效。当前曲目结束后,应自动开始播放下一首曲目。但我做不到。此外,我无法使用 AVQueuePlayer 执行此操作 - 播放列表从头开始播放。现在我的代码如下所示:

class TableViewController: UITableViewController {
...
    var player: AVPlayer!
    var playerQueue: [AVPlayerItem] = []
...
//Creating playerQueue from directory
private func createPlayerQueue(with content: [String], from directory: String?) -> [AVPlayerItem] {
        var playerQueue: [AVPlayerItem] = []
        content.forEach { (url) in
            let fileUrl = directory! + "/" + url
            let asset = AVAsset(url: URL(fileURLWithPath: fileUrl))
            let item = AVPlayerItem(asset: asset)
            playerQueue.append(item)
        }
        return playerQueue
    }
....
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let fullPath: String = currentDirectory! + "/" + content[indexPath.row]

                playerQueue = createPlayerQueue(with: content, from: currentDirectory)
                let currentItem = playerQueue[indexPath.row]
                player = AVPlayer(playerItem: currentItem)
                player.play()
    }

您可以使用 Key-Value Observer 或 Notification Center 来控制 playerItem,例如:音量、持续时间、搜索……

示例:

 NotificationCenter.default.addObserver(self, selector: #selector(itemDidPlayToEndTime), name: .AVPlayerItemDidPlayToEndTime, object: playerItem)

@objc func itemDidPlayToEndTime(notification: Notification) {
        if (notification.object as? AVPlayerItem) == self.player.currentItem {
            // Play next item in your queue
        }
    }