How to get System Volume iOS?
audiotoolbox, avfoundation
Solution
You need to initialize the audio session with:
AudioSessionInitialize (NULL, NULL, NULL, NULL);
in `viewDidLoad` or similar.
However, it's generally a better idea to make use of the new AVAudioSession class if you're targeting iOS 6+, which handles that for you:
float volume = [AVAudioSession sharedInstance].outputVolume;
Problem
I found an example here, but it does not work on ios6.1.3 (iphone 4s). always return 0.187500 Code: ``` Float32 volume; UInt32 dataSize = sizeof(Float32); AudioSessionInitialize (NULL, NULL, NULL, NULL); AudioSessionGetProperty ( kAudioSessionProperty_CurrentHardwareOutputVolume, &dataSize, &volume ); NSLog(@"%f", volume); ``` [AVAudioSession sharedInstance].outputVolume - also return 0.187500