要实现后台播放的功能，在
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法添加如下代码
//在静音模式下也能播放音频 进入后台也能播放
// 1.获取音频会话
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
// 2.设置后台播放类别
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
// 3.激活会话
[audioSession setActive:YES error:nil];
// 4.注册响应后台控制
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
[self becomeFirstResponder];
在播放界面添加代码：
这样就能在锁屏时控制音乐播放了
//开启锁屏处理多媒体事件
[self configRemoteControlEvents];
- (void)configRemoteControlEvents
{
//初始化远程控制中心
MPRemoteCommandCenter *commandCenter = [MPRemoteCommandCenter sharedCommandCenter];
if (@available(iOS 9.1, *)) {
//暂停
[commandCenter.pauseCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
self.isPlay = !self.isPlay;
[self.palyerBtn setImage:[[UIImage imageNamed:@"bg.music.bofang.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:UIControlStateNormal];
[self.player pause];
[self.musicTimer setFireDate:[NSDate distantFuture]];
NSLog(@"远程 暂停%@",self.player);
return MPRemoteCommandHandlerStatusSuccess;
}];
//播放
[commandCenter.playCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
self.isPlay = !self.isPlay;
[self.palyerBtn setImage:[[UIImage imageNamed:@"bg.music.zanting.png"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:UIControlStateNormal];
[self.player play];
[self.musicTimer setFireDate:[NSDate distantPast]];
NSLog(@"远程 播放%@",self.player);
return MPRemoteCommandHandlerStatusSuccess;
}];
//下一首
[commandCenter.nextTrackCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
if (self.musicSlider.value<0.9) {
//1.slider的value值发生变化时，currentTime也在发生变化（在playerAction中定义了value的公式）
float current = self.musicSlider.value;
[self.musicSlider setValue:(current + 0.1) animated:YES];
//2.获取最终的currentTime
float nextCurrent = (current + 0.1) * CMTimeGetSeconds(self.player.currentItem.duration);
//3.拖动slider导致value的值改变时，player能够让正在进行的item追着时间走
[self.player seekToTime:CMTimeMakeWithSeconds(nextCurrent, 1.0)];
}
return MPRemoteCommandHandlerStatusSuccess;
}];
//上一首
[commandCenter.previousTrackCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
if (self.musicSlider.value>0) {
//1.slider的value值发生变化时，currentTime也在发生变化（在playerAction中定义了value的公式）
float current = self.musicSlider.value;
[self.musicSlider setValue:(current - 0.1) animated:YES];
//2.获取最终的currentTime
float nextCurrent = (current - 0.1) * CMTimeGetSeconds(self.player.currentItem.duration);
//3.拖动slider导致value的值改变时，player能够让正在进行的item追着时间走
[self.player seekToTime:CMTimeMakeWithSeconds(nextCurrent, 1.0)];
}
return MPRemoteCommandHandlerStatusSuccess;
}];
//进度条拖动
[commandCenter.changePlaybackPositionCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
//CGFloat seekTime = event.timestamp;
CMTime totlaTime = self.player.currentItem.duration;
MPChangePlaybackPositionCommandEvent * playbackPositionEvent = (MPChangePlaybackPositionCommandEvent *)event;
[self.player seekToTime:CMTimeMake(totlaTime.value*playbackPositionEvent.positionTime/CMTimeGetSeconds(totlaTime), totlaTime.timescale) completionHandler:^(BOOL finished) {
//NSLog(@"finished ===> %d",finished);
}];
return MPRemoteCommandHandlerStatusSuccess;
//链接：https://www.jianshu.com/p/f7651c504cd9
}];
} else {
// Fallback on earlier versions
}
}
以上仅是部分代码截取记录，仅当参考