title: Facebook native login is not opening facebook app even if it's installed in device?
body: <p>i have followed every step described in the docs of facebook-iso-sdk 4.8.0 for iOS 9, but still couldn't preform app switch on "login-with-facebook" in my app, even if facebook app is already installed.</p>
  
  <p>As you can see in screen shot below i have modified info.plist, but still can't get native app switch to work.</p>
  
  <p>I have also double checked for typo-mistakes in info.plist value. and i can assure you they are correct.</p>
  
  <p>Here is my code :-</p>
  
  <pre><code>    if (![AppDelegate SharedInstance].login) {
          [AppDelegate SharedInstance].login = [[FBSDKLoginManager alloc] init];
      }
      [AppDelegate SharedInstance].login.loginBehavior = FBSDKLoginBehaviorNative;
      [[AppDelegate SharedInstance].login logInWithReadPermissions:@[@"public_profile",@"email",@"user_friends"] fromViewController:self handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
          if (error) {
  
          }
          else if (result.isCancelled)
          {
              // Handle cancellations
          }
          else
          {
              NSLog(@"result.grantedPermissions == %@",result.grantedPermissions);
              if (result.token)
              {
                  [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name, email, first_name, last_name"}]
                   startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
                       if (!error) {
                           NSLog(@"fetched user:%@", result);
                           NSString *userImageURL = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=large", [result objectForKey:@"id"]];
                           [dictFacebookDetail addEntriesFromDictionary:result];
                           [dictFacebookDetail setObject:userImageURL forKey:@"profilepic"];
                           NSLog(@"facebook login result --- %@",dictFacebookDetail);
                           [self performSelectorInBackground:@selector(CheckFacebookUser:) withObject:dictFacebookDetail];
                       }
                   }];
              }
          }
      }];
  </code></pre>
  
  <p><strong>What am i missing ?</strong></p>
  
  <p><a href="https://i.stack.imgur.com/UXiJB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UXiJB.png" alt="Screen Shot of info.plist"></a></p>