title: iOS How can I use UIApplication launchApplicationWithIdentifier which is in private APIs?
body: <p>[EDIT]I've jb my device. And I found the latest private APIs <a href="https://github.com/nst/iOS-Runtime-Headers" rel="nofollow">iOS-Runtime-Headers</a> on Github.</p>
  
  <p>I want to use private APIs in my app.</p>
  
  <p>I found <a href="https://github.com/kennytm/iphone-private-frameworks" rel="nofollow">kennytm/iphone-private-frameworks</a> on github but it only support iOS 3.x. While I'm working on iOS 5.0.1. </p>
  
  <p>I also found <a href="http://code.google.com/p/iphone-dev/source/browse/branches/include-1.2-sdk/include/UIKit/UIApplication.h?r=266" rel="nofollow">some codes</a> on Google iPhone development tools. But it really make me confused. I'm new to iPhone development. </p>
  
  <p>What should I do to use </p>
  
  <pre><code>[[UIApplication sharedApplication] launchApplicationWithIdentifier:@"com.a.b" suspended:NO];
  </code></pre>
  
  <p>Someone can give me a direction or some examples. Thanks a lot.</p>