如何使MPMoviePlayerController忽略静音开关

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
[audioSession setActive:YES error:nil];

#import <MediaPlayer/MediaPlayer.h>
#import <AVFoundation/AVFoundation.h>

// 创建MPMoviePlayerController实例
NSURL *videoURL = [NSURL URLWithString:@"视频的URL"];
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];

// 设置音频会话
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
[audioSession setActive:YES error:nil];

// 添加MPMoviePlayerController视图
[player.view setFrame:CGRectMake(0, 0, 320, 480)];
[self.view addSubview:player.view];

// 播放视频
[player play];