擷取ios耳機線控事件

-(BOOL)canBecomeFirstResponder{
    NSLog(@"_____%s_____",__FUNCTION__);
    return YES;
}


//received remote event
-(void)remoteControlReceivedWithEvent:(UIEvent *)event{
    NSLog(@"event tyipe:::%d   subtype:::%d",event.type,event.subtype);
    //type==2  subtype==單擊暫停鍵：103，雙擊暫停鍵104
    if (event.type == UIEventTypeRemoteControl) {
        switch (event.subtype) {

            case UIEventSubtypeRemoteControlPlay:{
                NSLog(@"play---------");
            }break;
            case UIEventSubtypeRemoteControlPause:{
                NSLog(@"Pause---------");
            }break;
            case UIEventSubtypeRemoteControlStop:{
                NSLog(@"Stop---------");
            }break;
            case UIEventSubtypeRemoteControlTogglePlayPause:{
                //單擊暫停鍵：103
                NSLog(@"單擊暫停鍵：103");
            }break;
            case UIEventSubtypeRemoteControlNextTrack:{
                //雙擊暫停鍵：104
                NSLog(@"雙擊暫停鍵：104");
            }break;
            case UIEventSubtypeRemoteControlPreviousTrack:{
                NSLog(@"三擊暫停鍵：105");
            }break;
            case UIEventSubtypeRemoteControlBeginSeekingForward:{
                NSLog(@"單擊，再按下不放：108");
            }break;
            case UIEventSubtypeRemoteControlEndSeekingForward:{
                NSLog(@"單擊，再按下不放，鬆開時：109");
            }break;
            default:
                break;
        }
    }
}

把上面代碼加進去就能擷取耳機線控的各個點擊事件，嘀嘀打車之前版本中有一個耳機搶單的功能，就是這麼實現的

====================================================================================================

ios 開發中 捕獲耳機插拔事件

void audioRouteChangeListenerCallback (
void *inUserData,
AudioSessionPropertyID inID,
UInt32 inDataSize,
const void *inData)
{
UInt32 propertySize = sizeof(CFStringRef);
AudioSessionInitialize(NULL, NULL, NULL, NULL);
CFStringRef state = nil;
AudioSessionGetProperty(kAudioSessionProperty_AudioRoute
,&propertySize,&state);

NSLog(@"%@",(NSString *)state);//return @"Headphone" or @"Speaker" and so on.
}
- (void)viewDidLoad {
[super viewDidLoad];

AudioSessionInitialize (NULL, NULL, NULL, NULL);
OSStatus status = AudioSessionAddPropertyListener(
kAudioSessionProperty_AudioRouteChange,
audioRouteChangeListenerCallback,self);
//if(status == 0){//ok;}
}

====================================================================================================

首先匯入系統類別庫  

#import<AVFoundation/AVFoundation.h>

   //監聽耳機事件

    [[AVAudioSessionsharedInstance] setDelegate:self];

    

   // Use this code instead to allow the app sound to continue to play when the screen is locked.

    [[AVAudioSessionsharedInstance] setCategory:AVAudioSessionCategoryPlaybackerror:nil];

    

   // Registers the audio route change listener callback function

   AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange,audioRouteChangeListenerCallback, self);

把這段代碼 寫到 你需要監聽的地方 

我個人推薦放到

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOption

因為是全域嘛 哪裡都可以響應到 

例如 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

   self.window = [[[UIWindowalloc] initWithFrame:[[UIScreenmainScreen]bounds]]autorelease];

   //登陸VC

   LoginViewController *loginVC = [[LoginViewControlleralloc]init ];

   UINavigationController *navNV = [[UINavigationControlleralloc]initWithRootViewController:loginVC ];

    [navNVsetNavigationBarHidden:YES];

    [loginVC release];

    

   //監聽耳機事件

    [[AVAudioSessionsharedInstance] setDelegate:self];

    

   // Use this code instead to allow the app sound to continue to play when the screen is locked.

    [[AVAudioSessionsharedInstance] setCategory:AVAudioSessionCategoryPlaybackerror:nil];

    

   // Registers the audio route change listener