title: Implement the application between the calling on the iphone
body: <p>I hope my application(e.g: appA) can call Third-party application(e.g: appB),When appB is finished running,I hope can get </p>
  
  <p>appS's running result(success 、fail or error) and the result tell appA,go back appA then continue to run appA,Now I know I </p>
  
  <p>can use the method that it's openURL.but, when I called appB after,I don't know how to go back appA.</p>
  
  <p>thanks</p>