Distinguishing between didSelectRowAtIndexPath and accessoryButtonTappedForRowWithIndexPath

I've implemented didSelectRowAtIndexPath and accessoryButtonTappedForRowWithIndexPath never seems to fire. However, didSelectRowAtIndexPath always fires, even when I click the access开发者_如何学JAVAory. Shouldn't these two be exclusive?

-[UITableViewDelegate accessoryButtonTappedForRowWithIndexPath:] is only called when the accessoryType of the cell is set to UITableViewCellAccessoryDetailDisclosureButton.