UIButton with a border

Let's say, you know how to add a button to your application.  Now let's add a border:

This effect should be done the code, for example in -viewDidLoad method:

- (void)viewDidLoad

{

    [super viewDidLoad];

    [[buttonTest layer] setCornerRadius:8.0f];

    [[buttonTest layer] setMasksToBounds:YES];

    [[buttonTest layer] setBorderWidth:3.0f];

}