title: UITextField is not updating
body: <p>I've been working on my app for a little while now, but I ran into a problem that seem so simple today. It probably just something stupid, but I couldn't find out. SO, please help.</p>
  
  <p>I have a <code>UITextField</code> that has been connected to <code>IBOutlet</code> property.
  In <code>viewDidLoad</code>, </p>
  
  <pre><code>self.myTextFied.text = @"123";
  </code></pre>
  
  <p>This line of code works.
  But in a method triggered by <code>self.delegate</code>, updating <code>myTextField.text</code> doesn't update the UI.</p>
  
  <pre><code>self.myTextFied.text = @"345";
  NSLog(@"%@",self.myTextField.text);
  </code></pre>
  
  <p><code>NSLog</code> of <code>self.myTextField.text</code> shows 345.
  Does anyone know what's the reason and how to fix?</p>