MusicKit Integration (Apple Music)

Time cost: 5-10 minutes

Key Insight

MusicKit's ApplicationMusicPlayer automatically publishes to MPNowPlayingInfoCenter. You don't need to manually update Now Playing info when playing Apple Music content.

What's Automatic

When using ApplicationMusicPlayer:

Track title, artist, album Artwork (Apple's album art) Duration and elapsed time Playback rate (playing/paused state)

The system handles all MPNowPlayingInfoCenter updates for you.

What's NOT Automatic Custom metadata (chapter markers, custom artist notes) Remote command customization beyond standard controls Mixing MusicKit content with your own content GOOD Code (MusicKit Content) import MusicKit

@MainActor class MusicKitPlayer { private let player = ApplicationMusicPlayer.shared

func play(song: Song) async throws {
    // ✅ Just play - MPNowPlayingInfoCenter updates automatically
    player.queue = [song]
    try await player.play()

    // ❌ DO NOT manually set nowPlayingInfo here
    // MPNowPlayingInfoCenter.default().nowPlayingInfo = [...] // WRONG!
}

}

Hybrid Apps (Own Content + Apple Music)

If your app plays both Apple Music and your own content:

import MusicKit

@MainActor class HybridPlayer { private let musicKitPlayer = ApplicationMusicPlayer.shared private var avPlayer: AVPlayer? private var currentSource: ContentSource = .none

enum ContentSource {
    case none
    case appleMusic      // MusicKit handles Now Playing
    case ownContent  // We handle Now Playing
}

func playAppleMusicSong(_ song: Song) async throws {
    // Switch to MusicKit
    avPlayer?.pause()
    currentSource = .appleMusic

    musicKitPlayer.queue = [song]
    try await musicKitPlayer.play()
    // ✅ MusicKit handles Now Playing automatically
}

func playOwnContent(_ url: URL) {
    // Switch to AVPlayer
    musicKitPlayer.pause()
    currentSource = .ownContent

    avPlayer = AVPlayer(url: url)
    avPlayer?.play()

    // ✅ Manually update Now Playing (Patterns 1-4)
    updateNowPlayingForOwnContent()
}

private func updateNowPlayingForOwnContent() {
    var nowPlayingInfo = [String: Any]()
    nowPlayingInfo[MPMediaItemPropertyTitle] = "My Track"
    // ... rest of manual setup from Patterns 1-4
    MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
}

}

Common Mistake // ❌ WRONG - Overwrites MusicKit's automatic Now Playing data func playAppleMusicSong(_ song: Song) async throws { try await ApplicationMusicPlayer.shared.play()

// ❌ This clears MusicKit's Now Playing info!
var nowPlayingInfo = [String: Any]()
nowPlayingInfo[MPMediaItemPropertyTitle] = song.title
MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo

}

// ✅ CORRECT - Let MusicKit handle it func playAppleMusicSong(_ song: Song) async throws { try await ApplicationMusicPlayer.shared.play() // That's it! MusicKit publishes Now Playing automatically. }

When to Use Manual Updates with MusicKit

Only override MPNowPlayingInfoCenter if:

You're mixing in additional metadata (e.g., podcast chapter markers) You're displaying custom content alongside Apple Music You have a specific reason to replace MusicKit's automatic behavior

Default: Let MusicKit manage Now Playing automatically.

Resources

Skills: axiom-now-playing, axiom-now-playing-carplay

axiom-now-playing-musickit

安装