Sometimes you'll want to generate several versions of the same image with different colors. For example you might want to generate images for different states of a button or perhaps your app allows users to pick their own colors for certain icon-like images. You can do it easily with UIImage categories from Matt Gemmell. For e.g., to generate a version in red, you can do:

UIImage* newImage = [originalImage imageTintedWithColor:[UIColor redColor]];

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