title: Call method from another app (Jailbreak iOS)
body: <p>On a jailbroken iOS device, is it possible for one app to call a method from another app (an instance method, not a static one)? Another way of phrasing this: how can I get the instance of an app (assuming the app is running) so that I can call one of its methods?</p>
  
  <p>Background: I am trying to call a function in the Music player app from a hooked method in the <code>iPodUI</code> Private Framework (see <a href="https://stackoverflow.com/a/19213187/381233">this post</a> for more details).</p>
  
  <p>This question has been asked for <a href="https://stackoverflow.com/questions/12339083/android-call-method-from-another-app">Android</a>, but I didn't find anything for jailbreak iOS. If that's because I'm asking the wrong question and there's a different approach to take, I'm open to that.</p>