有没有办法检查静音状态？ [复制]

Question

可能重复：
How to programatically sense the iPhone mute switch?

我希望我的应用检查静音开关是打开还是关闭！但是有一个问题……有它的功能吗？

提前致谢

Answer 1

How to programmatically sense the iPhone mute switch?

我相信这就是你要找的。​​p>

在这里发布代码：

// "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.");
}