UIImage gradient from two Colors

Gradient images look like very attractive, isn't it?
With this powerful Objective-C method creating an UIImage gradient image is too easy.
You need:
- http://objective-c-functions.blogspot.com/2013/06/helpful-color-struct-rgb-hsv.html
- http://objective-c-functions.blogspot.com/2013/06/get-rgba-components-of-uicolor.html


/** Returns a gradient image.

 @param startColor Color to start from.
 @param endColor Color to end to.
 @param size Size of the result image.
 @return Returns a new UIImage which is the result of gradient effect from two colors.

 */
+ (UIImage *)imageGradientWithStartColor:(UIColor *)startColor endColor:(UIColor *)endColor size:(CGSize)size {

    // Allocate color space.
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    // Allocate bitmap context.
    CGContextRef bitmapCotext = CGBitmapContextCreate(NULL, size.width, size.height, 8, 4 * size.width, colorSpace, kCGImageAlphaPremultipliedFirst);
    // Create the gradient.
    CGFloat locations[2] = { 0.0f, 1.0f };
    COLOR_RGBA startRgba    = [LMFunctions rgbaFromUIColor:startColor];
    COLOR_RGBA endRgba        = [LMFunctions rgbaFromUIColor:endColor];
    CGFloat components[8] = {
        startRgba.r, startRgba.g, startRgba.b, 1.0f,    // Start color.
        endRgba.r, endRgba.g, endRgba.b, 1.0f };        // End color.
    CGGradientRef myGradient = CGGradientCreateWithColorComponents(colorSpace, components, locations, 2);
    // Draw gradient here.
    CGContextDrawLinearGradient(bitmapCotext, myGradient, CGPointMake(0, 0), CGPointMake(size.width, size.height), kCGGradientDrawsAfterEndLocation);
    // Create a CGImage from context.
    CGImageRef cgImage = CGBitmapContextCreateImage(bitmapCotext);
    // Create a UIImage from CGImage.
    UIImage *uiImage = [UIImage imageWithCGImage:cgImage];

    // Release resources.
    CGGradientRelease(myGradient);
    CGImageRelease(cgImage);
    CGContextRelease(bitmapCotext);
    CGColorSpaceRelease(colorSpace);

    return uiImage;
}


Download the ready-for-use source file (.m) of UIImage gradient from two Colors