在范围内找不到 MPRemoteCommandCenter
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【中文标题】在范围内找不到 MPRemoteCommandCenter【英文标题】:Can not find MPRemoteCommandCenter in scope 【发布时间】:2020-12-04 11:07:46 【问题描述】:我创建了一个音乐应用程序,现在我想添加一个功能来从锁定屏幕和控制中心控制音乐,但我收到错误消息,MPRemoteCommandCenter 不在范围内。
这是我的代码的样子。
我正在 XCode 12 中开发,但适用于 ios 12.4。
import UIKit
import AVKit
class SongViewController: UIViewController
override func viewDidLoad()
super.viewDidLoad()
let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(respondToSwipeGesture))
swipeRight.direction = .right
self.view.addGestureRecognizer(swipeRight)
let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(respondToSwipeGesture))
swipeLeft.direction = .left
self.view.addGestureRecognizer(swipeLeft)
setupRemoteTransportControls()
setupNowPlaying()
func setupRemoteTransportControls()
let commandCenter = MPRemoteCommandCenter.shared()
commandCenter.playCommand.addTarget [unowned self] event in
print("Play command - is playing: \(self.player.isPlaying)")
if !self.player.isPlaying
self.play()
return .success
return .commandFailed
// Add handler for Pause Command
commandCenter.pauseCommand.addTarget [unowned self] event in
print("Pause command - is playing: \(self.player.isPlaying)")
if self.player.isPlaying
self.pause()
return .success
return .commandFailed
【问题讨论】:
【参考方案1】:您需要导入MediaPlayer
框架
import UIKit
import AVKit
import MediaPlayer
...
【讨论】:
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