Question

i have implemented this sample code below to get a connection to the user feed post

- (void)viewDidLoad
{
    [super viewDidLoad];

    facebook = [[Facebook alloc] initWithAppId:@"197765190297119" andDelegate:self];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
    facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];


}

and this sample code is called when the user logs in… it calls now by a button pressed for check, but dosent do any, perhaps i can get a dialog feed insted

    NSString *str=@"Your String to post";

NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                               str,@"message",
                               @"Test it!",@"name",                                   
                               nil];
Facebook *fb = [[Facebook alloc] init];
[fb requestWithGraphPath:@"me/feed"   // or use page ID instead of 'me'
               andParams:params
           andHttpMethod:@"POST"
             andDelegate:self];

Answer 1

This is a walkthrough of uploading an image to the facebook wall. I copied this out of an older application, the current facebook API works a little bit different. I think you can see my main point of using a shared facebook object, which you use to do the authentication and also the requests to the API. I took out a few things to make it easier to understand. Apple actually wants you to check for an existing internet connection. I hope it helps.

@synthesize facebook;

//login with facebook
- (IBAction) facebookButtonPressed {
    if (!facebook || ![facebook isSessionValid]) {
        self.facebook = [[[Facebook alloc] init] autorelease];
        NSArray *perms = [NSArray arrayWithObjects: @"read_stream", @"create_note", nil];
        [facebook authorize:FACEBOOK_API_KEY permissions:perms delegate:self];
    }
    else {
        [self fbDidLogin];
    }
}

//upload image once you're logged in
-(void) fbDidLogin {
    [self fbUploadImage];
}

- (void) fbUploadImage
{
    NSMutableDictionary * params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                    resultImage, @"picture",
                                    nil];
    [facebook requestWithMethodName: @"photos.upload" 
                          andParams: params
                      andHttpMethod: @"POST" 
                        andDelegate: self]; 

    self.currentAlertView = [[[UIAlertView alloc]
                             initWithTitle:NSLocalizedString(@"Facebook", @"")  
                             message:NSLocalizedString(@"Uploading to Facebook.", @"")  
                             delegate:self 
                             cancelButtonTitle:nil
                             otherButtonTitles: nil] autorelease];

    [self.currentAlertView show];
}

//facebook error
- (void)request:(FBRequest*)request didFailWithError:(NSError*)error
{

    [self.currentAlertView dismissWithClickedButtonIndex:0 animated:YES];
    self.currentAlertView = nil;

    UIAlertView *myAlert = [[UIAlertView alloc]
                            initWithTitle:NSLocalizedString(@"Error", @"")  
                            message:NSLocalizedString(@"Facebook error message", @"")
                            delegate:self 
                            cancelButtonTitle:nil
                            otherButtonTitles:@"OK", nil];
    [myAlert show];
    [myAlert release];
}

//facebook success
- (void)request:(FBRequest*)request didLoad:(id)result
{
    [self.currentAlertView dismissWithClickedButtonIndex:0 animated:YES];
    self.currentAlertView = nil;

    UIAlertView *myAlert = [[UIAlertView alloc]
                            initWithTitle:NSLocalizedString(@"Facebook", @"") 
                            message:NSLocalizedString(@"Uploaded to Facebook message", @"")
                            delegate:self 
                            cancelButtonTitle:nil
                            otherButtonTitles:@"OK", nil];
    [myAlert show];
    [myAlert release];
}