Post Photo and Message wall with Facebook iOS6 SDK

gistfile1.m

// Start here https://developers.facebook.com/docs/getting-started/getting-started-with-the-ios-sdk/
// Install the Facebook SDK, get it linked up, create an app, and get that setup correctly 
// in your info.plist, appDelegate, and build settings.  

//Note: This example uses ARC. If you aren't using ARC, made sure to release/retain objects as needed.


//Now for the fun part.

////////////////////////////
// Step 1. Login with permissions.
////////////////////////////

-(void)loginThenPost {
   NSArray *permissions = [NSArray arrayWithObjects:@"publish_actions", 
                            @"user_photos", 
                            nil];
    
    [FBSession sessionOpenWithPermissions:permissions 
        completionHandler:^(FBSession *session, 
                            FBSessionState status, 
                            NSError *error) {
            if(error) {
                UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Problem connecting with Facebook" delegate:nil cancelButtonTitle:@"Okay" otherButtonTitles:nil];
                [alert show];
            } else {
                [self postPhoto];
            }            
    }];
}

////////////////////////////
// Step 2. Post that photo to FB.
////////////////////////////

-(void)postPhoto {
    // We're going to assume you have a UIImage named image_ stored somewhere.
    
    FBRequestConnection *connection = [[FBRequestConnection alloc] init];
    
    // First request uploads the photo.
    FBRequest *request1 = [FBRequest 
                           requestForUploadPhoto:image_];
    [connection addRequest:request1
         completionHandler:
     ^(FBRequestConnection *connection, id result, NSError *error) {
         if (!error) {
         }
     }
            batchEntryName:@"photopost"
     ];
    
    // Second request retrieves photo information for just-created 
    // photo so we can grab its source.
    FBRequest *request2 = [FBRequest 
                           requestForGraphPath:@"{result=photopost:$.id}"];
    [connection addRequest:request2
         completionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
             if (!error && result) {
                 NSString *ID = [result objectForKey:@"id"];
                 [self postDataWithPhoto:ID];
             }
         }
     ];
    
    [connection start];
}

////////////////////////////
// Step 3. Post message with linked photo to the user's wall.
// We're going to post to the open graph 'user/feed' stream.
// Go here https://developers.facebook.com/docs/reference/api/ and do a page find for
// '/PROFILE_ID/feed' to get extra information about the parameters accepted in this call.
////////////////////////////

-(void)postDataWithPhoto:(NSString*)photoID {
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    [params setObject:@"I'm totally posting on my own wall!" forKey:@"message"];

    if(photoID) {
        [params setObject:photoID forKey:@"object_attachment"];
    }
    
    [FBRequest startForPostWithGraphPath:@"me/feed"
                             graphObject:[NSDictionary dictionaryWithDictionary:params]
                       completionHandler:
     ^(FBRequestConnection *connection, id result, NSError *error) {
         if (!error) {
             [[[UIAlertView alloc] initWithTitle:@"Result" 
                                         message:@"Your update has been posted to Facebook!" 
                                        delegate:self 
                               cancelButtonTitle:@"Sweet!" 
                               otherButtonTitles:nil] show]; 
         } else {
             [[[UIAlertView alloc] initWithTitle:@"Error" 
                                         message:@"Yikes! Facebook had an error.  Please try again!" 
                                        delegate:nil 
                               cancelButtonTitle:@"Ok" 
                               otherButtonTitles:nil] show]; 
         }
     }
     ];
}

wondering if it's possible to post a photo-comment in iOS sdk? *e.g. reply comment with photo