【发布时间】：2020-04-13 15:31:24
【问题描述】：
所以我使用以下 .swift 文件来获取在锁定屏幕和通知屏幕上显示媒体播放器控件的通知。以下代码在 iOS 上可以正常工作，但在 iPad 上不行。
我已将完整代码上传到 Github https://github.com/redimongo/DRN1
有问题的部分是我需要为 iPad 添加什么才能获得媒体控制权？
//
// MusicPlayer.swift
// DRN1
//
// Created by Russell Harrower on 25/11/19.
// Copyright © 2019 Russell Harrower. All rights reserved.
//
import Foundation
import AVFoundation
import MediaPlayer
import Kingfisher
class MusicPlayer {
static let shared = MusicPlayer()
var player: AVPlayer?
func startBackgroundMusic() {
self.setupRemoteTransportControls()
let urlString = "http://stream.radiomedia.com.au:8003/stream"
guard let url = URL.init(string: urlString)
else {
return
}
let playerItem = AVPlayerItem.init(url: url)
player = AVPlayer.init(playerItem: playerItem)
player?.play()
do {
// try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [.mixWithOthers, .allowAirPlay])
try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [.duckOthers, .defaultToSpeaker, .mixWithOthers, .allowAirPlay])
print("Playback OK")
let defaults = UserDefaults.standard
defaults.set("1", forKey: defaultsKeys.musicplayer_connected)
try AVAudioSession.sharedInstance().setActive(true)
print("Session is Active")
} catch {
let defaults = UserDefaults.standard
defaults.set("0", forKey: defaultsKeys.musicplayer_connected)
print(error)
}
}
func setupRemoteTransportControls() {
// Get the shared MPRemoteCommandCenter
let commandCenter = MPRemoteCommandCenter.shared()
// Add handler for Play Command
commandCenter.playCommand.addTarget { [unowned self] event in
if self.player?.rate == 0.0 {
self.player?.play()
return .success
}
return .commandFailed
}
// Add handler for Pause Command
commandCenter.pauseCommand.addTarget { [unowned self] event in
if self.player?.rate == 1.0 {
self.player?.pause()
return .success
}
return .commandFailed
}
// self.nowplaying(artist: "Anna", song: "test")
}
func nowplaying(with artwork: MPMediaItemArtwork, artist: String, song: String){
MPNowPlayingInfoCenter.default().nowPlayingInfo = [
MPMediaItemPropertyTitle:song,
MPMediaItemPropertyArtist:artist,
MPMediaItemPropertyArtwork: artwork,
MPNowPlayingInfoPropertyIsLiveStream: true
]
// self.getArtBoard();
}
func setupNowPlayingInfo(with artwork: MPMediaItemArtwork) {
MPNowPlayingInfoCenter.default().nowPlayingInfo = [
// MPMediaItemPropertyTitle: "Some name",
// MPMediaItemPropertyArtist: "Some name",
MPMediaItemPropertyArtwork: artwork,
//MPMediaItemPropertyPlaybackDuration: CMTimeGetSeconds(currentItem.duration),
//MPNowPlayingInfoPropertyPlaybackRate: 1,
//MPNowPlayingInfoPropertyElapsedPlaybackTime: CMTimeGetSeconds(currentItem.currentTime())
]
}
func getData(from url: URL, completion: @escaping (UIImage?) -> Void) {
URLSession.shared.dataTask(with: url, completionHandler: {(data, response, error) in
if let data = data {
completion(UIImage(data:data))
}
})
.resume()
}
func getArtBoard(artist: String, song: String, cover: String) {
guard let url = URL(string: cover) else { return }
getData(from: url) { [weak self] image in
guard let self = self,
let downloadedImage = image else {
return
}
let artwork = MPMediaItemArtwork.init(boundsSize: downloadedImage.size, requestHandler: { _ -> UIImage in
return downloadedImage
})
self.nowplaying(with: artwork, artist: artist, song: song)
}
}
func stopBackgroundMusic() {
guard let player = player else { return }
player.pause()
}
}
我添加了没有成功
override func viewDidLoad() {
UIApplication.shared.beginReceivingRemoteControlEvents()
do {
try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default)
try AVAudioSession.sharedInstance().setActive(true)
} catch {
print(error)
}
}
【问题讨论】：
-
除非我在这里遗漏了真正的问题，否则在 iPad 上运行您的项目可以很好地显示传输控制。即使应用程序在后台，它们也能按预期工作。这是截图：imgur.com/cfw1eOM
-
@alladinian 是在模拟器中吗？因为在 iPad 7 模拟器上它不起作用，即使 Apple 说它不起作用。我需要规格。
-
这是来自真实设备（iPad 6th gen / 2018 / 9.7"）