为什么MPRemoteCommandCenter play命令后Swift AVAudioPlayer不改变状态？

import AVFoundation
import MediaPlayer

class ViewController: UIViewController {
    var audioPlayer: AVAudioPlayer?

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建AVAudioPlayer实例
        guard let audioPath = Bundle.main.path(forResource: "audio", ofType: "mp3") else { return }
        let audioUrl = URL(fileURLWithPath: audioPath)
        audioPlayer = try? AVAudioPlayer(contentsOf: audioUrl)
        
        // 设置远程控制命令
        let remoteCommandCenter = MPRemoteCommandCenter.shared()
        remoteCommandCenter.playCommand.addTarget { [weak self] _ in
            self?.playAudio()
            return .success
        }
    }
    
    func playAudio() {
        if audioPlayer?.isPlaying == true {
            audioPlayer?.pause()
        } else {
            audioPlayer?.play()
        }
    }
}