title: UIActivityViewController & UIDocumentInteractionController not showing options
body: <p>I am new to UIActivityViewController and perhaps I am missing a basic understanding. What I am trying to do is attached a csv, xml and vcard file to activity controller and show dropbox, google drive etc options. I have downloaded and installed dropbox, google drive etc apps on my iPhone.</p>
  
  <p>Now when I launch UIActivityViewController all I see are default message and email app in my acitivity controller. How can I have other apps show up on their too? Do I need to install each and every apps individual SDKs and somehow incorporate them in my app?</p>
  
  <p>This is what I wold like to see</p>
  
  <p><img src="https://i.stack.imgur.com/sUtE5.png" alt="enter image description here"> </p>
  
  <p>but this is what I see instead.</p>
  
  <p><img src="https://i.stack.imgur.com/uAHoH.png" alt="enter image description here"></p>
  
  <p>Here's the code that I have tried so far</p>
  
  <pre><code>-(IBAction) dropBoxAction
  {
  
      paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask ,YES);
      NSString* documentsPath = [paths objectAtIndex:0];
  
      //CSV
      NSMutableString *fileNameStr = [NSMutableString stringWithFormat:@"test_CSV_Backup.csv"];
      NSString* csvDataFileStr = [documentsPath stringByAppendingPathComponent:fileNameStr];
      NSData *csvData = [NSData dataWithContentsOfFile:csvDataFileStr];
  
      //EXCEL
      NSMutableString *fileNameStr2 = [NSMutableString stringWithFormat:@"test_EXCEL_Backup.xml"];
      NSString* excelDataFileStr = [documentsPath stringByAppendingPathComponent:fileNameStr2];
      NSData *excelData = [NSData dataWithContentsOfFile:excelDataFileStr];
  
      //VCARD
      NSMutableString *fileNameStr3 = [NSMutableString stringWithFormat:@"test_VCARD_Backup.vcf"];
      NSString* vcardDataFileStr = [documentsPath stringByAppendingPathComponent:fileNameStr3];
      NSData *vcardData = [NSData dataWithContentsOfFile:vcardDataFileStr];
  
  
      //adding them all together
      NSMutableArray *sharingItems = [NSMutableArray new];
      [sharingItems addObject:csvData];
      [sharingItems addObject:excelData];
      [sharingItems addObject:vcardData];
  
      UIActivity *activity = [[UIActivity alloc] init];
      NSArray *applicationActivities = @[activity];
  
      UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:sharingItems applicationActivities:applicationActivities];
      [self presentViewController:activityController animated:YES completion:nil];
  
  
  }
  </code></pre>