title: How to disable multi touch on UIPageViewController?
body: <p>I am asking this question because on my custom <code>UIPageViewController</code>, I can swipe left or right from last to first page using exactly one gesture. </p>
  
  <p>In other words, while I swipe with first finger, I am able to continue swiping with my second finger only when I put second finger on the screen BEFORE I leave the first one. It leads me to some troubles related to updating the view while swiping.</p>
  
  <p>The question is how to disable described above case with multi touch. <strong>How to prevent from behaviour like above?</strong>  </p>