how to give image for uinavigation controller back button
<p>Ima developing one application.In that i used the UINavigationController.But i want to set the image for back button.i set the image using below code.</p>

<pre><code>UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"backArrow.png"] style:UIBarButtonItemStyleBordered target:nil action:nil];
self.navigationItem.backBarButtonItem = backButton;
</code></pre>

<p>But this not fit to bak button.It appear only at the middle of the back button.So please tell me how t set the image for whole back button.</p>
