Create UIImage rectangle from color

UIImage_from_color

+ (UIImage *)imageWithColor:(UIColor *)color {
    CGRect rect = CGRectMake(0, 0, 1, 1);
    // Create a 1 by 1 pixel context
    UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0);
    [color setFill];
    UIRectFill(rect);   // Fill it with your color
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return image;
}

// source: http://ioscodesnippet.com/2011/08/22/creating-a-placeholder-uiimage-dynamically-with-color/