title: Programatically created a UIButton, but no click effect (text effect only)
body: <p>I create a button like this, but when I click on it there's no changing effect.</p>
  
  <pre><code>    UIButton *button = [[UIButton alloc] init];
      button.translatesAutoresizingMaskIntoConstraints = NO;
      [button setTitle: @"xxxxx" forState: UIControlStateNormal];
      [button setTitleColor: [UIColor colorWithRed:0.98 green:0.44 blue:0.05 alpha:1] forState: UIControlStateNormal];
  </code></pre>
  
  <p>I'm not going to use two images, I just want the text to change a bit. Just like a fresh button dragged to the UIViewController.</p>
  
  <p>What did I miss?</p>