Keyboard not resigning when viewcontroller is poped from the navigation controller
<p>i am facing a problem in resigning the keyboard. i have a <code>tableViewController</code> in a navigation controller and a different view controller is pushed to the navigation controller on selection of one of the cell. in the view controller i have assigned a textfield as the first responder so that the keyboard shows up as soon as viewcontroller is pushed and the keyboard is resigned while poping the viewcontroller</p>

<pre><code>- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
    [self.navigationController popViewControllerAnimated:YES];

}

- (void)viewWillDisappear:(BOOL)animated{
    [self.textField resignFirstResponder];
}
</code></pre>

<p>this is working fine when. But again when i push the same view controller and when i pop it the keyboard is not resigning.It is blocking the view of the tableViewController. i cant make out what actually i have went wrong ..
any help Please....</p>
