How to post to a users wall using Facebook SDK

Question

I want to post some text to a users wall using the facebook sdk in an iOS app.

Is posting an open graph story now the only way to do that?

I've found with open graph stories they are really strange, you can only post things in the format "user x a y" where you preset x and y directly on facebook, like user ata a pizza or user played a game. Setting up each one is pretty laborious too because you have to create a .php object on an external server for each one.

Am I missing something or is there a simpler way to go about this?

Answer 1

Figured it out by browsing the facebook tutorials a bit more.

-(void) postWithText: (NSString*) message
           ImageName: (NSString*) image
                 URL: (NSString*) url
             Caption: (NSString*) caption
                Name: (NSString*) name
      andDescription: (NSString*) description
{

    NSMutableDictionary* params = [[NSMutableDictionary alloc] initWithObjectsAndKeys:
                                   url, @"link",
                                   name, @"name",
                                   caption, @"caption",
                                   description, @"description",
                                   message, @"message",
                                   UIImagePNGRepresentation([UIImage imageNamed: image]), @"picture",
                                   nil];

    if ([FBSession.activeSession.permissions indexOfObject:@"publish_actions"] == NSNotFound)
    {
        // No permissions found in session, ask for it
        [FBSession.activeSession requestNewPublishPermissions: [NSArray arrayWithObject:@"publish_actions"]
                                              defaultAudience: FBSessionDefaultAudienceFriends
                                            completionHandler: ^(FBSession *session, NSError *error)
        {
             if (!error)
             {
                 // If permissions granted and not already posting then publish the story
                 if (!m_postingInProgress)
                 {
                     [self postToWall: params];
                 }
             }
         }];
    }
    else
    {
        // If permissions present and not already posting then publish the story
        if (!m_postingInProgress)
        {
            [self postToWall: params];
        }
    }
}

-(void) postToWall: (NSMutableDictionary*) params
{
    m_postingInProgress = YES; //for not allowing multiple hits

    [FBRequestConnection startWithGraphPath:@"me/feed"
                                 parameters:params
                                 HTTPMethod:@"POST"
                          completionHandler:^(FBRequestConnection *connection,
                                              id result,
                                              NSError *error)
     {
         if (error)
         {
             //showing an alert for failure
             UIAlertView *alertView = [[UIAlertView alloc]
                                       initWithTitle:@"Post Failed"
                                       message:error.localizedDescription
                                       delegate:nil
                                       cancelButtonTitle:@"OK"
                                       otherButtonTitles:nil];
             [alertView show];
         }
         m_postingInProgress = NO;
     }];
}

Answer 2

the easiest way of sharing something from your iOS app is using the UIActivityViewController class, here you can find the documentation of the class and here a good example of use. It is as simple as:

NSString *textToShare = @”I just shared this from my App”;
UIImage *imageToShare = [UIImage imageNamed:@"Image.png"];
NSURL *urlToShare = [NSURL URLWithString:@"http://www.bronron.com"];
NSArray *activityItems = @[textToShare, imageToShare, urlToShare];

UIActivityViewController *activityVC = [[UIActivityViewController alloc]initWithActivityItems:activityItems applicationActivities:nil];
[self presentViewController:activityVC animated:TRUE completion:nil];

This will only work on iOS 6 and it makes use of the Facebook account configured in the user settings, and the Facebook SDK is not needed.

Answer 3

You can use Graph API as well.

After all the basic steps to create facebook app with iOS, you can start to enjoy the functionality of Graph API. The code below will post "hello world!" on your wall:

#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>

...

//to get the permission 
//https://developers.facebook.com/docs/facebook-login/ios/permissions  
if ([[FBSDKAccessToken currentAccessToken] hasGranted:@"publish_actions"]) {
            NSLog(@"publish_actions is already granted.");
        } else {
            FBSDKLoginManager *loginManager = [[FBSDKLoginManager alloc] init];
            [loginManager logInWithPublishPermissions:@[@"publish_actions"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
                //TODO: process error or result.
            }];
        }

    if ([[FBSDKAccessToken currentAccessToken] hasGranted:@"publish_actions"]) {
        [[[FBSDKGraphRequest alloc]
          initWithGraphPath:@"me/feed"
          parameters: @{ @"message" : @"hello world!"}
          HTTPMethod:@"POST"]
         startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
             if (!error) {
                 NSLog(@"Post id:%@", result[@"id"]);
             }
         }];
    }
...

The basic staff is presented here: https://developers.facebook.com/docs/ios/graph

The explorer to play around is here: https://developers.facebook.com/tools/explorer

A good intro about it: https://www.youtube.com/watch?v=WteK95AppF4