title: Can we add or use handleOpenURL other app delegate
body: <p>I'm building SDK for my product and there will be no app delegate class. I used Dropbox Integration in my SDK, so I'm bound to use following method.</p>
  
  <pre><code>- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
      NSString *stringUrl = [url absoluteString];
      if ([stringUrl containsString:@"cancel"]) {
  
          // Handle if user cancelled the login
          [[NSNotificationCenter defaultCenter] postNotificationName:@"dropboxRegistrationCancel" object:self];
          return NO;
      }
  
      if ([[DBSession sharedSession] handleOpenURL:url]) {
          if ([[DBSession sharedSession] isLinked]) {
              NSLog(@"App linked successfully!");
              // At this point you can start making API calls
               [[NSNotificationCenter defaultCenter] postNotificationName:ApplicationComeBackFromDropBoxLoginPage object:self];
          }
          return YES;
      }
      // Add whatever other url handling code your app requires here
      return NO;
  }
  </code></pre>
  
  <p>So Issue is there is no app delegate than how can use above method?
  Or any alternate solution for this to use this in another class (like to inherit UIResponder class).
  Looking for help.</p>