How to implement alpha gradient on a image?

Question

I want to implement alpha gradient on an image. From 0.5 alfa on top of the image to 0.0 on bottom. Any advice, tutorial, link is welcome.

Answer 1

I found something here, it works great!

AlphaGradientView* gradient = [[AlphaGradientView alloc] initWithFrame:
                           CGRectMake(self.view.frame.size.width - 150, 0, 150, 
                                                self.view.frame.size.height)];

gradient.color = [UIColor yellowColor];
gradient.direction = GRADIENT_RIGHT;
[self.view addSubview:gradient];