iPhone 耳机插孔 - 读取数据

iPhone 耳机插孔 - 读取数据？

swift
import UIKit
import MediaPlayer
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        // 创建一个 MPVolumeView 对象
        let volumeView = MPVolumeView(frame: CGRect(x: -CGFloat.greatestFiniteMagnitude, y: 0, width: 0, height: 0))
        view.addSubview(volumeView)
        // 模拟连接一个外部设备到耳机插孔
        let accessories = MPMediaQuery.songs().items
        if let accessory = accessories?.first {
            print("读取到的数据：\(accessory.title)")
        }
    }
}