Support taking pictures with volume button #92
Merged
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This PR adds the functionality to trigger the camera when using the volume buttons, just like the native camera app.
Right now it supports both the volume up and down but that could be changes in the future.
This is done by starting an audio session to not change the ringtone volume.
We add
MPVolumeView
to capture and remove the default volume changed HUD.Finally we listen to
AVSystemController_SystemVolumeDidChangeNotification
which is a global notification that is invoked when the user changes the volume on his/her phone.#91 should be merged before this one.