ios - Turn off part of the iPhone Screen -


i'm trying work on ios app turns off screen (so when in dark, doesn't show light @ all), can turn on , off pixels of screen.

does know way this? assuming it's either or nothing... either turn off screen, or turn on, maybe knows better?

i guessing best turn background black little light possible comes through. however, tried using ipad , still generates light in pitch black room. want instance, 1 pixel shine brightly, , rest not glow @ all. , if not possible, there way mimic this?

as far i'm aware screen either on or off, there's no controller setting specific regions on/off.

also can't change pixel level brightness, screen isn't illuminated way. can control overall screen brightness, not each pixel, screen lighting technology doesn't work way, it's led backlight.


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