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Showing posts from March, 2016

Add tint to UIImage

I have been working on a SDK that allows user to customize colors for images. In many cases, I need to add an image to a button with different color at run time. So using just tintColor is not going to work. The following method will mask an image with the color you define. - (UIImage *)maskWithColor:(UIColor *)color { CGImageRef maskImage = self.CGImage; CGFloat width = self.size.width * self.scale; CGFloat height = self.size.height * self.scale; CGRect bounds = CGRectMake(0,0,width,height); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef bitmapContext = CGBitmapContextCreate(NULL, width, height, 8, 0, colorSpace, kCGBitmapAlphaInfoMask & kCGImageAlphaPremultipliedLast); CGContextClipToMask(bitmapContext, bounds, maskImage); CGContextSetFillColorWithColor(bitmapContext, color.CGColor); CGContextFillRect(bitmapContext, bounds); CGImageRef cImage = CGBitmapContextCreateImage(bitmapContext); UIImage *col