从媒体播放器中获取随机播放的曲目

Question

我想从媒体播放器中获取队列。我相信我无法读取队列（这是正确的吗？）并且我只能在设置队列时获取队列，例如当我 select 播放某个播放列表时。但是我正在努力获得随机队列。

            let musicPlayerController = MPMusicPlayerController.systemMusicPlayer
            let myMediaQuery = MPMediaQuery.songs()
            let predicateFilter = MPMediaPropertyPredicate(value: chosenPlaylist, forProperty: MPMediaPlaylistPropertyName)
            myMediaQuery.filterPredicates = NSSet(object: predicateFilter) as? Set<MPMediaPredicate>
            musicPlayerController.setQueue(with: myMediaQuery)
            musicPlayerController.repeatMode = .all
            musicPlayerController.shuffleMode = .songs
            musicPlayerController.play()
            for track in myMediaQuery.items! {
                print(track.value(forProperty: MPMediaItemPropertyTitle)!)
            } // here I don't get the shuffled order that is going to play, just get the original order of the playlist

我需要随机播放，因为我希望能够显示接下来要播放的内容。

Answer 1

我过去在使用 .shuffleMode 时遇到过问题。改为对集合调用 shuffled()：

// shuffle
func shufflePlaylist() {

    let query = MPMediaQuery.songs()
    let predicate = MPMediaPropertyPredicate(value: "Art Conspiracy",
                                             forProperty: MPMediaPlaylistPropertyName,
                                             comparisonType: .equalTo)
    query.addFilterPredicate(predicate)

    guard let items = query.items else { return }
    let collection = MPMediaItemCollection(items: items.shuffled())

    player.setQueue(with: collection)
    player.prepareToPlay()
    player.play()
}

从媒体播放器中获取随机播放的曲目

Get Shuffled Tracks from Media Player

media-player

swift

apple-musickit