Safely Remove Observer

[mattyohe]

Had an old version of your code in our app and there was a crasher due to over-removing the sessionVolumeKeyPath in dealloc. I'm not sure what scenario led to the observer not properly being added.

I would recommend wrapping this line:
https://github.com/jpsim/JPSVolumeButtonHandler/blob/master/JPSVolumeButtonHandler/JPSVolumeButtonHandler.m#L47

in an empty @Try so that this no longer crashes in odd scenarios.

[underscoretang]

hey @mattyohe did this ever get resolved for you?

[mattyohe]

@underscoretang Sure, I just did exactly what I said in the comment above. Is that not clear? Let me know.