UINavigiationBar left / back image scaled?

T开发者_JAVA百科rying to use a nice 'back' arrow image, like that found in Apple's iPod app - when I add my 30x30 image it seems to squashed or scaled, as it looks tiny?

Is it possible that the UINavigationBar's back item will have to be custom view perhaps?

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Here is a quote from Apple's View Controller Programming Guide which you might find helpful:

To assign a custom button or view to the left position, and thereby replace the default Back button, assign a UIBarButtonItem object to the leftBarButtonItem property.

The UIBarButtonItem class has a call to initWithImage which allows you to set the view with an image of your choosing. Hope this helps.