Chapter 2. Flashlight

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A flashlight app is one of the canonical simple apps that anybody can create. The idea is that the app makes the screen completely white, so the screen itself becomes a decent flashlight when it’s dark. (Another variation would be a “mirror” app that makes the screen completely black!) Certainly a “blank white screen” app is even simpler to implement than the Tally app. But this chapter’s Flashlight app is no ordinary flashlight! It supports custom colors, flashing ...

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