UIButton with gradient

The following code adds a gradient effect to the button:

    CAGradientLayer* gradientLayer = [[CAGradientLayer alloc] init];

    [gradientLayer setBounds:[buttonTest bounds]];

    [gradientLayer setPosition:

     CGPointMake([buttonTest bounds].size.width/2,

                 [buttonTest bounds].size.height/2)];

    

    [gradientLayer setColors:

     [NSArray arrayWithObjects:

      (id)[[UIColor blueColor] CGColor],

      (id)[[UIColor cyanColor] CGColor], nil]];

    [[buttonTest layer] insertSublayer:gradientLayer atIndex:0];    

    [gradientLayer release];

The result may look so: