gradient

gistfile1.m

    CAGradientLayer *gradient = [CAGradientLayer layer];
    gradient.frame = shadowFrame;
    gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:1.0] CGColor],
                       (id)[[UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:0.7] CGColor],
                       (id)[[UIColor colorWithRed:0.2 green:0.2 blue:0.2 alpha:0.0] CGColor],
                       nil];
    gradient.locations = [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0], [NSNumber numberWithFloat:0.30], [NSNumber numberWithFloat:1.0], nil];