title: Xcode - UITextField get null
body: <p>I've a navigationcontroller. In my secondview, i want to have a button, that when is tapped, go to the first viewController and set a text there.</p>
  
  <p>So, in my button (secondView) I have:</p>
  
  <pre><code>SearchViewController *svc=[[SearchViewController alloc]init];
  [svc setValueMethod:@"randomString"];
  [self.navigationController popToRootViewControllerAnimated:YES];
  </code></pre>
  
  <p>In my firtView:</p>
  
  <pre><code>-(void)setValueMethod:(NSString *)myPassedString
  {
      _searchField.text = myPassedString;
  }
  </code></pre>
  
  <p>But the _searchField now is null. But when you first enter on the app it works, ok and you can make _searchField.text = @"aString"; that work. But after popping from the secondView it get's null!</p>
  
  <p>Can someone help me with that?</p>