Sharing fb image and message content within the app not working using FBSDKShareDialog

Question

I am using the following code to share a picture and some message on the fb timeline using FBSDK open graph object and FBSDK open graph content.however the following code does nothing,no dialog is presented nor does it post anything to the timeline.am i missing anything in this code or does this code not work in the simulator?

- (IBAction)shareButtonPressed:(id)sender {
    NSString *contentDesc=@"abcdcccdcc";
    NSString *title=[NSString stringWithFormat:@"%@ \n asd %@, asd %@",self.nameLabel.text,_fromDate.text,_toDate.text];

    FBSDKSharePhoto *photo = [[FBSDKSharePhoto alloc] init];
    photo.image = _profilePic.image;
    photo.userGenerated = YES;

    // Create an object
    NSDictionary *properties = @{
                                @"og:type": @"memories.memory",
                                 @"og:title":title ,
                                 @"og:description":contentDesc

                                 };
    FBSDKShareOpenGraphObject *object = [FBSDKShareOpenGraphObject  objectWithProperties:properties];

    // Create an action
    FBSDKShareOpenGraphAction *action = [[FBSDKShareOpenGraphAction alloc] init];
    action.actionType = @"memories.view";
    [action setObject:object forKey:@"memories.memory"];

    // Add the photo to the action
    [action setPhoto:photo forKey:@"image"];

    // Create the content
    FBSDKShareOpenGraphContent *content = [[FBSDKShareOpenGraphContent alloc] init];
    content.action = action;
    content.previewPropertyName = @"memories.memory";

    [FBSDKShareDialog showFromViewController:self
                                 withContent:content
                                    delegate:nil];   
}

in the delegate method

-(void)sharer:(id<FBSDKSharing>)sharer didFailWithError:(NSError *)error
{


    NSLog(@"%@",error);
}

the error log is printed as follows

Error Domain=com.facebook.sdk.share Code=2 "The operation couldn’t be completed. (com.facebook.sdk.share error 2.)" UserInfo=0x7faec97bb660 {com.facebook.sdk:FBSDKErrorArgumentValueKey=<FBSDKShareOpenGraphContent: 0x7faecbc16740>, com.facebook.sdk:FBSDKErrorDeveloperMessageKey=Feed share dialogs support FBSDKShareLinkContent., com.facebook.sdk:FBSDKErrorArgumentNameKey=shareContent}

Answer 1

change [action setPhoto:photo forKey:@"image"]; to [object setPhoto:photo forKey:@"og:image"];