title: changing font size of UIButton
body: <p>I have a <code>UIButton</code> which displays a text, with the following code:</p>
  
  <pre><code> [button setTitle:@"Join this group" forState:UIControlStateNormal];
  </code></pre>
  
  <p>however, how do I change the font size for this?
  I tried</p>
  
  <pre><code>button.titleLabel.font = [UIFont fontWithName:@"Arial-MT" size:8.0];
  </code></pre>
  
  <p>but I think it's a totally different thing.
  Or at least how do I make the text to adjust to the size of the button frame.
  Should I just use textLabel.text instead?</p>