Detect Silent mode in iOS5?

问题

I have used this method in the past to detect if the silent switch is enabled:

- (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;
}

This is no longer working in iOS5 on my iPad or iPhone. Is this a known issue? I haven\'t been able to find any answers on stack overflow or Apple dev forums.

Hope you can help...

回答1:

We won't be able to detect the silent switch state anymore since iOS 5...

The answer from Apple is there on the accepted answer : Detecting the iPhone's Ring / Silent / Mute switch using AVAudioPlayer not working?

回答2:

As mentioned in the iOS Developer Library, the property kAudioSessionProperty_AudioRoute is deprecated. Instead, Use the kAudioSessionProperty_AudioRouteDescription

https://developer.apple.com/library/ios/#documentation/AudioToolbox/Reference/AudioSessionServicesReference/Reference/reference.html

This question has been answered here: Detecting the iPhone's Ring / Silent / Mute switch using AVAudioPlayer not working?

来源：https://stackoverflow.com/questions/7798891/detect-silent-mode-in-ios5

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iphone