invertedImageWithColor

invertedImageWithColor.m

-(UIImage *)invertedImageWithColor:(UIColor*)color {
    
    UIGraphicsBeginImageContextWithOptions(self.size, NO, 0.0);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGRect contextRect = CGContextGetClipBoundingBox(context);
    
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, contextRect);
    
    [self drawInRect:contextRect blendMode:kCGBlendModeDestinationOut alpha:1.0];
    
    UIImage *invertedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return invertedImage;
}