title: How to implement a loading animation when navigating in a iPhone app?
body: <p>It seems like a pretty simple problem, but I have been unable to find any good answers.</p>
  
  <p>What I'm trying to do is to make some sort of animation while some function is loading. I have already included an animated .gif file in the webapp when waiting for content, but I need the same functionality when navigating in native. For instance, when I press a button in the tab bar, the screen is just blank until the entire page is loaded.</p>
  
  <p>It doesn't need to be anything fancy. I like the way this is solved in the facebook app with the infamous "spinning wheel" for instance.</p>
  
  <p>Thanks in advance!</p>