title: Facebook login page showing blank page in IOS 9
body: <p>I am using FBSDKCoreKit (4.12.0) FBSDKLoginKit (4.12.0) 
  first i am getting screen 1 </p>
  
  <p>This method is block is never called .</p>
  
  <pre><code>FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
  [login logInWithReadPermissions:@[@"email",@"public_profile"] fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
      //never called
  }];
  </code></pre>
  
  <p>getting this warning</p>
  
  <pre><code> Warning: Attempt to present &lt;FBSDKContainerViewController: 0x16570810&gt; on &lt;ViewController: 0x16528870&gt; whose view is not in the window hierarchy!
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/ArHt4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ArHt4.png" alt="enter image description here"></a></p>
  
  <p>Then i press ok button i am getting blank page without moving to any other page </p>
  
  <p><a href="https://i.stack.imgur.com/19OSl.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/19OSl.jpg" alt="enter image description here"></a></p>
  
  <p>Plist file i used is</p>
  
  <p>For Transpost security </p>
  
  <pre><code>    &lt;key&gt;NSAppTransportSecurity&lt;/key&gt;
          &lt;dict&gt;
              &lt;key&gt;NSAllowsArbitraryLoads&lt;/key&gt;
              &lt;true/&gt;
              &lt;key&gt;NSExceptionDomains&lt;/key&gt;
              &lt;dict&gt;
                  &lt;key&gt;facebook.com&lt;/key&gt;
                  &lt;dict&gt;
                      &lt;key&gt;NSExceptionRequiresForwardSecrecy&lt;/key&gt;
                      &lt;false/&gt;
                      &lt;key&gt;NSIncludesSubdomains&lt;/key&gt;
                      &lt;true/&gt;
                  &lt;/dict&gt;
                  &lt;key&gt;fbcdn.net&lt;/key&gt;
                  &lt;dict&gt;
                      &lt;key&gt;NSExceptionRequiresForwardSecrecy&lt;/key&gt;
                      &lt;false/&gt;
                      &lt;key&gt;NSIncludesSubdomains&lt;/key&gt;
                      &lt;true/&gt;
                  &lt;/dict&gt;
              &lt;/dict&gt;
          &lt;/dict&gt;
  
  Query schems
  
  
      &lt;key&gt;LSApplicationQueriesSchemes&lt;/key&gt;
          &lt;array&gt;
              &lt;string&gt;fbauth&lt;/string&gt;
              &lt;string&gt;fbapi&lt;/string&gt;
              &lt;string&gt;fb-messenger-api&lt;/string&gt;
              &lt;string&gt;fbauth2&lt;/string&gt;
              &lt;string&gt;fbshareextension&lt;/string&gt;
              &lt;string&gt;fbapi20130214&lt;/string&gt;
              &lt;string&gt;fbapi20130410&lt;/string&gt;
              &lt;string&gt;fbapi20130702&lt;/string&gt;
              &lt;string&gt;fbapi20131010&lt;/string&gt;
              &lt;string&gt;fbapi20131219&lt;/string&gt;
              &lt;string&gt;fbapi20131219&lt;/string&gt;
              &lt;string&gt;fbapi20140410&lt;/string&gt;
              &lt;string&gt;fbapi20140116&lt;/string&gt;
              &lt;string&gt;fbapi20150313&lt;/string&gt;
              &lt;string&gt;fbapi20150629&lt;/string&gt;
              &lt;string&gt;fb-messenger-api20140430&lt;/string&gt;
          &lt;/array&gt;
          &lt;key&gt;CFBundleURLTypes&lt;/key&gt;
          &lt;array&gt;
              &lt;dict&gt;
                  &lt;key&gt;CFBundleURLSchemes&lt;/key&gt;
                  &lt;array&gt;
                      &lt;string&gt;fb268237443567174&lt;/string&gt;
                  &lt;/array&gt;
              &lt;/dict&gt;
          &lt;/array&gt;
          &lt;key&gt;FacebookAppID&lt;/key&gt;
          &lt;string&gt;268237443567174&lt;/string&gt;
          &lt;key&gt;FacebookDisplayName&lt;/key&gt;
          &lt;string&gt;MyAPP&lt;/string&gt;
  </code></pre>