title: iOS How to use Entitlement.plist to specify property of my app
body: <p>I'm using Jailbreak + Appsync + iOS5.0.1 device (without a developer license but with some tricks I can run my app on the device)</p>
  
  <p>Now I want to use a private API launchApplicationWithIdentifier:suspended:. So I need to add</p>
  
  <pre><code>&lt;key&gt;com.apple.springboard.launchapplications&lt;/key&gt;
  &lt;true/&gt;
  </code></pre>
  
  <p>to myApp.entitlements.plist file. Then it should work but I still got the error </p>
  
  <pre><code>'Receiver type 'UIApplication' for instance message does not declare a method 
   with selector 'launchApplicationWithIdentifier:suspended:''
  </code></pre>
  
  <p>Then I found someone said, code signing must be enable if I want to use Entitlements.plist. Is it true? I must have a developer license?</p>
  
  <p>Or is there any other way to use this method? I read some method about how to use private API. It seems difficult. I'm new to iOS development.</p>
  
  <p>Thank you.</p>