How to programmatically silence the ringer or change the ringer tone on iOS5

Question

Is there a way to reduce the volume of the ringer or change the ringer tone on iOS5?

I checked out the Celestial framework, but can't instantiate AVSystemController. :-(

I don't care if this get's the app rejected in the AppStore as it will never be submitted.

Polyhydric

Answer 1

Yes. Use AVSystemController. You don't instantiate it. It's a singleton.

http://code.google.com/p/iphone-dev/source/browse/trunk/include/include/Celestial/AVSystemController.h?r=136

[[AVSystemController sharedAVSystemController] setVolumeTo:10.0 forCategory:@"Ringtone"];

Kudos

Could you provide an example, please? – Polyhydric

I tried including the file you linked, but I get the following error: Undefined symbols for architecture i386: "_OBJC_CLASS_$_AVSystemController", referenced from: objc-class-ref in FRRViewController.o ld: symbol(s) not found for architecture i386 Besides, there's not setVolumeTo:forCategory: method in the linked file. – Polyhydric

It simply may not exist in the simulator — have you tested on device? You could use [[NSClassFromString(@"AVSystemController") sharedAVSystemController]... to produce code that works either way if that's the cause. – Cornstalk

You have to link against the Celestial framework. Or you can do what Tommy suggested if you want to avoid linking against it. – Kudos

And setVolumeTo:forCategory: does exist. The file I linked to is old. Maybe from iOS 3. setVolumeTo:forCategory: is available in iOS 4 and 5 I think. – Kudos

@tommy I had already tried what you suggested, but [[NSClassFromString(@"AVSystemController") sharedAVSystemController] always returns nil, both on the simulator and the device (iPhone 4 on iOS 5). – Polyhydric

@Fernando I have used that exact code, and it works fine. Also, it won't work on the simulator, only an actual device. – Kudos

This approach is working well for me. Where can I find a list of supported categories though? So far I'm only aware of "Ringtone" and "UserInterfaceSoundEffects". – Cooke

Answer 2

This might be what you are looking for: Override ringer volume in iPhone apps

Basically, you set the volume using AVAudioPlayer on the -(void)viewDidLoad method of the view you are displaying on

Campbellite