iOS检测耳机是否插入详解手机开发

    #import <AVFoundation/AVFoundation.h>   
       
    - (BOOL)isHeadsetPluggedIn {   
        AVAudioSessionRouteDescription* route = [[AVAudioSession sharedInstance] currentRoute];   
        for (AVAudioSessionPortDescription* desc in [route outputs]) {   
            if ([[desc portType] isEqualToString:AVAudioSessionPortHeadphones])   
                return YES;   
        }   
        return NO;   
    }