耳机线控

耳机的拔插

NSError*error;

[[AVAudioSessionsharedInstance]setCategory:AVAudioSessionCategoryPlaybackerror:&error];

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(outputDeviceChanged:)name:AVAudioSessionMediaServicesWereResetNotificationobject:[AVAudioSessionsharedInstance]];

- (void)outputDeviceChanged:(NSNotification*)aNotification

{

NSDictionary*userInfoDic = [aNotificationuserInfo];

NSLog(@"info1 : %@", userInfoDic);

AVAudioSessionRouteDescription*dic = [userInfoDicobjectForKey:@"AVAudioSessionRouteChangePreviousRouteKey"];

for(AVAudioSessionPortDescription* descin[dicoutputs]) {

NSLog(@"lalalalal=%@", [descportType]);

if([[descportType]isEqualToString:AVAudioSessionPortHeadphones]) {

NSLog(@"fuck it");

}

}

}

耳机的音量+、音量-

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(volumeClicked:)name:@"AVSystemController_SystemVolumeDidChangeNotification"object:nil];

-(void)volumeClicked:(NSNotification*)aNotification{

//在这里我们就可以实现对音量键进行监听，完成响应的操作。noti中也有一些相关的信息可以看看

NSDictionary*userInfoDic = [aNotificationuserInfo];

NSLog(@"info2 : %@", userInfoDic);

}

[[UIApplicationsharedApplication]beginReceivingRemoteControlEvents];

去掉显示音量提示框

AVAudioSession*audio = [AVAudioSessionsharedInstance];

[audiosetActive:YESerror:nil];

MPVolumeView*volumeView = [[MPVolumeViewalloc]initWithFrame:CGRectMake(100,100,10,10)];

volumeView.hidden=NO;

[self.viewaddSubview:volumeView];

//iOS检测耳机是否插入(单纯的判断开始的时候,是否存在耳机)

[selfisHeadsetPluggedIn];

- (BOOL)isHeadsetPluggedIn {

AVAudioSessionRouteDescription* route = [[AVAudioSessionsharedInstance]currentRoute];

for(AVAudioSessionPortDescription* descin[routeoutputs]) {

if([[descportType]isEqualToString:AVAudioSessionPortHeadphones])

returnYES;

}

returnNO;

}

耳机中间按钮

//后台控制

[[UIApplicationsharedApplication]beginReceivingRemoteControlEvents];

- (void)remoteControlReceivedWithEvent:(UIEvent*)receivedEvent {

NSLog(@">>>>>会走吗>>>>>");

if(receivedEvent.type==UIEventTypeRemoteControl) {

switch(receivedEvent.subtype) {

caseUIEventSubtypeRemoteControlPause:

//点击了暂停

NSLog(@">>>>>点击了暂停>>>>>");

break;

caseUIEventSubtypeRemoteControlNextTrack:

//点击了下一首

NSLog(@">>>>>点击了下一首>>>>>");

break;

caseUIEventSubtypeRemoteControlPreviousTrack:

//点击了上一首

//此时需要更改歌曲信息

NSLog(@">>>>>点击了上一首>>>>>");

break;

caseUIEventSubtypeRemoteControlPlay:

//点击了播放

NSLog(@">>>>>点击了播放>>>>>");

break;

default:

break;

}

}

}