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    <p>I just wrote a tutorial that will help with this. My approach gives you a copy of a UIImage, with the color alterations that you want. rpetrich's approach is great, but requires that you're creating a subclass. My approach is just a few lines of code that can be dropped in wherever you need them. <a href="http://coffeeshopped.com/2010/09/iphone-how-to-dynamically-color-a-uiimage" rel="nofollow noreferrer">http://coffeeshopped.com/2010/09/iphone-how-to-dynamically-color-a-uiimage</a></p> <pre><code>NSString *name = @"badge.png"; UIImage *img = [UIImage imageNamed:name]; // begin a new image context, to draw our colored image onto UIGraphicsBeginImageContext(img.size); // get a reference to that context we created CGContextRef context = UIGraphicsGetCurrentContext(); // set the fill color [color setFill]; // translate/flip the graphics context (for transforming from CG* coords to UI* coords CGContextTranslateCTM(context, 0, img.size.height); CGContextScaleCTM(context, 1.0, -1.0); // set the blend mode to color burn, and the original image CGContextSetBlendMode(context, kCGBlendModeColorBurn); CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height); CGContextDrawImage(context, rect, img.CGImage); // set a mask that matches the shape of the image, then draw (color burn) a colored rectangle CGContextClipToMask(context, rect, img.CGImage); CGContextAddRect(context, rect); CGContextDrawPath(context,kCGPathFill); // generate a new UIImage from the graphics context we drew onto UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); //return the color-burned image return coloredImg; </code></pre>
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    1. COIf you use this method you should replace the CGContextClipToMask line with CGContextSetBlendMode(context, kCGBlendModeSourceIn); as per @seaniepie recommendation below. For me it cleared up an issue where CGContextClipToMask caused a faint outline around all images in the original color.
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