iPhone - how to create a Textured Background

In the Interface Builder (xCode/Mac) I would like to set a Textured Background color. How can I add a texture (image) so I'll be able to use a new custom background?

I know I can set the background like this:

- (void)viewDidLoad {开发者_StackOverflow
    [super viewDidLoad];
    self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"table_bg.png"]];
}

How can I do this with the Interface Builder?

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You can't use your own UIImage's as a background pattern in Interface Builder but you can use the ones built in