如何以编程方式感知 iPhone 静音开关? [英] How to programmatically sense the iPhone mute switch?

问题描述

我似乎无法在 SDK 中找到如何以编程方式感知 iPhone 上的静音按钮/开关.当我的应用播放背景音乐时，它会正确响应音量按钮，而我没有任何代码可以遵循，但是，当我使用静音开关时，它只是继续播放.

I can't seem to find in the SDK how to programatically sense the mute button/switch on the iPhone. When my app plays background music, it responds properly to the volume button without me having any code to follow that but, when I use the mute switch, it just keeps playing away.

如何测试静音位置?

(注意:我的程序有自己的静音开关，但我希望物理开关覆盖它.)

(NOTE: My program has its own mute switch, but I'd like the physical switch to override that.)

推荐答案

谢谢，JPM.事实上，您提供的链接会指向正确的答案(最终.;)为了完整性(因为 S.O. 应该是快速答案的来源！)...

Thanks, JPM. Indeed, the link you provide leads to the correct answer (eventually. ;) For completeness (because S.O. should be a source of QUICK answers! )...

// "Ambient" makes it respect the mute switch
// Must call this once to init session
if (!gAudioSessionInited)
{
    AudioSessionInterruptionListener    inInterruptionListener = NULL;
    OSStatus    error;
    if ((error = AudioSessionInitialize (NULL, NULL, inInterruptionListener, NULL)))
    {
        NSLog(@"*** Error *** error in AudioSessionInitialize: %d.", error);
    }
    else
    {
        gAudioSessionInited = YES;
    }
}

SInt32  ambient = kAudioSessionCategory_AmbientSound;
if (AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (ambient), &ambient))
{
    NSLog(@"*** Error *** could not set Session property to ambient.");
}

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