What is the internal format of UIImage?

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for ipad

e.g. for pixel size 10x10 image, how much memory is used?

provide some other contribution: usually for a normal iPad, it start w开发者_如何学Pythonith app-usable memory of 190-200mb this number decrease if background process / other apps is running

many thanks!~~~

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10 x 10 x 4 = 400bytes for that image, so it's 4 bytes per pixel. (GRBA).

Also it is normal for background app to take some memory. iOS will free memory if needed by any app.