I need to make a photo app.
Will it be possible to assign some function, like controlling the light intensity or brightness to an iPhone's hardware volume control buttons?
How to restart your iPhone X, 11, 12, 13, or later. Press and hold either volume button and the side button until the power-off slider appears. Drag the slider, then wait 30 seconds for your device to turn off.
Yes, you can. In Android phones, you can remap your volume button (either up or down) to open the power menu using apps like Button Mapper.
This is possible. This tutorial will walk you through the steps.
http://fredandrandall.com/blog/2011/11/18/taking-control-of-the-volume-buttons-on-ios-like-camera/
Changing the behavior of iPhone external hardware buttons is a violation of the iPhone Developer Program License Agreement.
There is an app that was banned from the appstore for trying this.
Ironically, iOS5
Camera App allows to use the volume control as a shutter. Perhaps the SDK will eventually allow more.
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