我正在使用 AVPlayer 来再现音乐。一切在 iOS 6+ 上在模拟器上运行良好。但是当我在设备(iPhone 5s、iOS 7.1)上运行它时,MPNowPlayingInfoCenter 显示来自任何其他音乐应用程序的信息:spotify/声音云/音乐播放器,而不是我的应用程序中当前播放的项目。
这是我用来在 MPNowPlayingInfoCenter 中设置音乐信息的代码:
- (void)setupNowPlayingInfoCenter
{
if (NSClassFromString(@"MPNowPlayingInfoCenter")) {
// Here enters fine.
MPNowPlayingInfoCenter *playingInfoCenter = [MPNowPlayingInfoCenter defaultCenter];
if (self.playingUrl) {
NSMutableDictionary *songInfo = self.songInfo;
MPMediaItemArtwork *albumArt = [[MPMediaItemArtwork alloc] initWithImage:[self.playingObject valueForKey:@"image"]];
[songInfo setObject:[self.playingObject valueForKey:@"song"] forKey:MPMediaItemPropertyTitle];
[songInfo setObject:[self.playingObject valueForKey:@"artist"] forKey:MPMediaItemPropertyArtist];
[songInfo setObject:[self.playingObject valueForKey:@"album"] forKey:MPMediaItemPropertyAlbumTitle];
[songInfo setObject:[NSNumber numberWithDouble:self.progress] forKey:MPNowPlayingInfoPropertyElapsedPlaybackTime];
[songInfo setObject:[NSNumber numberWithDouble:self.duration] forKey:MPMediaItemPropertyPlaybackDuration];
[songInfo setObject:(self.isPaused ? @(0.0f) : @(1.0f)) forKey:MPNowPlayingInfoPropertyPlaybackRate];
[songInfo setObject:albumArt forKey:MPMediaItemPropertyArtwork];
playingInfoCenter.nowPlayingInfo = songInfo;
}
其他相关代码:
- (NSError *)initialize
{
NSError *error = nil;
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback
error:&error];
if (error) {
NSLog(@"%@", [error description]);
return error;
}
[audioSession setActive:YES error:&error];
if (error) {
NSLog(@"%@", [_error description]);
return error;
}
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
return error;
}
任何帮助将不胜感激。
最佳答案
好吧,我自己找到了答案。
我正在为每首歌创建新的播放器,如下所示:
self.audioPlayer = [AVPlayer playerWithURL:url];
我将其更改为:
AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:url];
[self.audioPlayer replaceCurrentItemWithPlayerItem:playerItem];
神奇地,它开始起作用了。
关于ios - AVPlayer + MPNowPlayingInfoCenter 适用于模拟器,但不适用于设备,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28418252/