Draw a two part gradient in a given graphics context in one line of code.

gistfile1.m

- (void)drawGradientInContext:(CGContextRef)context withStartPosition:(CGPoint)startPosition endPosition:(CGPoint)endPosition startColor:(UIColor *)startColor endColor:(UIColor *)endColor 
{
    CGFloat locations[2] = {0.0, 1.0};
	const CGFloat *startComponents = CGColorGetComponents(startColor.CGColor);
	const CGFloat *endComponents = CGColorGetComponents(endColor.CGColor);
    CGFloat components[8] = {startComponents[0], startComponents[1], startComponents[2], startComponents[3], endComponents[0], endComponents[1], endComponents[2], endComponents[3]};
    
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGGradientRef gradient = CGGradientCreateWithColorComponents(colorSpace, components, locations, 2);
    CGContextDrawLinearGradient(context, gradient, startPosition, endPosition, 0);
	
    CGGradientRelease(gradient);
    CGColorSpaceRelease(colorSpace);
}