如何使用iOS FBDialogs在Facebook上发布我们的预定义文本和图像

Question

我使用以下FBDialogs代码在Facebook上分享帖子。 （我们要求我不要使用SLComposer）

我想在facebook帖子上分享预定义的文字和图片。

- (void)postAStatusMessage
{

    // Check if the Facebook app is installed and we can present the share dialog

    FBLinkShareParams *params = [[FBLinkShareParams alloc] init];
    params.link = [NSURL URLWithString:@"https://developers.facebook.com/docs/ios/share/"];

    // If the Facebook app is installed and we can present the share dialog
    if ([FBDialogs canPresentShareDialogWithParams:params]) {

        // Present share dialog
        [FBDialogs presentShareDialogWithLink:nil
                                      handler:^(FBAppCall *call, NSDictionary *results, NSError *error) {
                                          if(error) {
                                              // An error occurred, we need to handle the error
                                              // See: https://developers.facebook.com/docs/ios/errors
                                              NSLog(@"Error publishing story: %@", error.description);
                                          } else {
                                              // Success
                                              NSLog(@"result %@", results);
                                          }
                                      }];

        // If the Facebook app is NOT installed and we can't present the share dialog
    } else {
        // FALLBACK: publish just a link using the Feed dialog
        // Show the feed dialog
        [FBWebDialogs presentFeedDialogModallyWithSession:nil
                                               parameters:nil
                                                  handler:^(FBWebDialogResult result, NSURL *resultURL, NSError *error) {
                                                      if (error) {
                                                          // An error occurred, we need to handle the error
                                                          // See: https://developers.facebook.com/docs/ios/errors
                                                          NSLog(@"Error publishing story: %@", error.description);
                                                      } else {
                                                          if (result == FBWebDialogResultDialogNotCompleted) {
                                                              // User cancelled.
                                                              NSLog(@"User cancelled.");
                                                          } else {
                                                              // Handle the publish feed callback
                                                              NSDictionary *urlParams = [self parseURLParams:[resultURL query]];

                                                              if (![urlParams valueForKey:@"post_id"]) {
                                                                  // User cancelled.
                                                                  NSLog(@"User cancelled.");

                                                              } else {
                                                                  // User clicked the Share button
                                                                  NSString *result = [NSString stringWithFormat: @"Posted story, id: %@", [urlParams valueForKey:@"post_id"]];
                                                                  NSLog(@"result %@", result);
                                                              }
                                                          }
                                                      }
                                                  }];
    }
}

我将facebook屏幕显示为空，如下所示，

但我想分享 my predefine text with the one selected image 如何实现这一目标？