检测耳机(不是麦克风)是否已插入 iOS 设备 [英] Detect if headphones (not microphone) are plugged in to an iOS device

问题描述

我需要根据是否插入耳机来更改我的音频.我知道 kAudioSessionProperty_AudioInputAvailable，它会告诉我是否有麦克风，但我想测试任何耳机，而不仅仅是带有一个内置麦克风.这可能吗?

I need to change my audio depending on whether or not headphones are plugged in. I'm aware of kAudioSessionProperty_AudioInputAvailable, which will tell me if there's a microphone, but I'd like to test for any headphones, not just headphones with a built-in microphone. Is this possible?

推荐答案

这是我自己的一种方法，它是在这个站点上找到的一个稍微修改过的版本:http://www.iphonedevsdk.com/forum/iphone-sdk-development/9982-play-记录同一时间.html

Here is a method of my own which is a slightly modified version of one found on this site : http://www.iphonedevsdk.com/forum/iphone-sdk-development/9982-play-record-same-time.html

- (BOOL)isHeadsetPluggedIn {
    UInt32 routeSize = sizeof (CFStringRef);
    CFStringRef route;

    OSStatus error = AudioSessionGetProperty (kAudioSessionProperty_AudioRoute,
                                              &routeSize,
                                              &route);

    /* Known values of route:
     * "Headset"
     * "Headphone"
     * "Speaker"
     * "SpeakerAndMicrophone"
     * "HeadphonesAndMicrophone"
     * "HeadsetInOut"
     * "ReceiverAndMicrophone"
     * "Lineout"
     */

    if (!error && (route != NULL)) {

        NSString* routeStr = (NSString*)route;

        NSRange headphoneRange = [routeStr rangeOfString : @"Head"];

        if (headphoneRange.location != NSNotFound) return YES;

    }

    return NO;
}

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