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桃花长相依
JPM。实际上，你提供的链接会得到正确的答案（最终。;）为了完整性（因为SO应该是QUICK答案的来源！）......// "Ambient" makes it respect the mute switch// Must call this once to init sessionif (!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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GCT1015
-(BOOL)silenced {
#if TARGET_IPHONE_SIMULATOR
// return NO in simulator. Code causes crashes for some reason.
return NO;
#endif
CFStringRef state;
UInt32 propertySize = sizeof(CFStringRef);
AudioSessionInitialize(NULL, NULL, NULL, NULL);
AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &propertySize, &state);
if(CFStringGetLength(state) > 0)
return NO;
else
return YES;
}
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噜噜哒
如果您不在静音模式下，其他答案中的某些代码（包括接受的答案）可能不起作用，其中静音开关受到尊重。我编写了下面的例程切换到环境，读取开关，然后返回到我的应用程序中需要的设置。-(BOOL)muteSwitchEnabled {#if TARGET_IPHONE_SIMULATOR // set to NO in simulator. Code causes crashes for some reason. return NO;#endif// go back to Ambient to detect the switchAVAudioSession* sharedSession = [AVAudioSession sharedInstance];[sharedSession setCategory:AVAudioSessionCategoryAmbient error:nil];CFStringRef state;UInt32 propertySize = sizeof(CFStringRef);AudioSessionInitialize(NULL, NULL, NULL, NULL);AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &propertySize, &state);BOOL muteSwitch = (CFStringGetLength(state) <= 0);NSLog(@"Mute switch: %d",muteSwitch);// code below here is just restoring my own audio state, YMMV_hasMicrophone = [sharedSession inputIsAvailable];NSError* setCategoryError = nil;if (_hasMicrophone) { [sharedSession setCategory: AVAudioSessionCategoryPlayAndRecord error: &setCategoryError]; // By default PlayAndRecord plays out over the internal speaker. We want the external speakers, thanks. UInt32 ASRoute = kAudioSessionOverrideAudioRoute_Speaker; AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute, sizeof (ASRoute), &ASRoute );}else // Devices with no mike don't support PlayAndRecord - we don't get playback, so use just playback as we don't have a microphone anyway [sharedSession setCategory: AVAudioSessionCategoryPlayback error: &setCategoryError];if (setCategoryError) NSLog(@"Error setting audio category! %@", setCategoryError);return muteSwitch;}