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Change color of the iPhone screen

I need to change the color of the iPhone screen when i touch on it. The only thing i need to do is to change the color of the area where i am touching. if i am placing a star 开发者_如何学编程on the screen as touch then only that area color will be changed.

Any idea about this?


Take a look at some of the Graphics and Animation iPhone SDK Samples - there are samples there that show how to paint with different colours and other samples of how to use user input.

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