当用户打开静音开关时静音

https://developer.apple.com/library/content/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/AudioSessionCategoriesandModes/AudioSessionCategoriesandModes.html

您需要AVAudioSessionCategoryAmbient,这将导致应用程序被静音按钮静音。

苹果没有任何直接的API来了解iPhone的静音模式。然而,我们确实有一些工作要解决。

上一个SO答案可以帮助您找到解决方法。

How to programmatically sense the iPhone mute switch?

How can I detect whether an iOS device is in silent mode or not?

对于来自SO的快速有效解决方案 answer .

// "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.");
}