title: Why UIButton's title content is abbreviated after calling [sizeToFit]?
body: <p>I tried to fit UIButton to its title text by calling <code>[SizeToFit]</code>. Unfortunately, I got unwanted result as the following.</p>
  
  <p><img src="https://i.stack.imgur.com/3M8lc.png" alt="enter image description here"></p>
  
  <p>I suppose that the button's size is smaller than its title size. therefore, the title string was abbreviated. The simple and silly solution I chose was plus 20pt to its width after calling <code>[sizeToFit]</code>.</p>
  
  <p>I believe that there is any solution better than I used.<br>
  Is there anybody who know it?</p>