title: Creating a "loading..." view using iPhone SDK
body: <p>How to create that black/gray modal popup kind of view that many apps use, when some long pending operation is in progress?</p>
  
  <p>Like when using location based services, loading a webpage, the screen goes dim and there is a modal view showing a spinning icon "Please wait..."</p>
  
  <p>Example in the following screenshot: </p>
  
  <p><img src="https://farm4.staticflickr.com/3379/3503268688_0064567134_m.jpg" alt="Screenshot"></p>