Question

Im just starting out with the Facebook SDK for iOS and checked out the documentation and other help thoroughly but can’t be successful.

I have started a new view based app and authorised just as recommended in the docs. Everytime I start the app its switches to the Facebook app (which I have installed on my iPhone) and says already authorised, press okay. How can I stop it repeatedly doing this?

I also have tried posting to Facebook without a dialog. The console tells me a request is made but then a error occurs (doesn’t crash but the didFailWithError tells me).

Anyway I haven’t posted any of my code as it seems relatively simple so if there is someone who knows how to do this I would massively appreciate any help, and possibly even a code sample.

Thanks.

Answer 1

You’re missing a key point in your delegate, you have to save the session data yourself

- (void)fbDidLogin {
    // store the access token and expiration date to the user defaults
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:facebook.accessToken forKey:ACCESS_TOKEN_KEY];
    [defaults setObject:facebook.expirationDate forKey:EXPIRATION_DATE_KEY];
    [defaults synchronize];
}

And then when you initialize facebook you would do the following

facebook = [[Facebook alloc] initWithAppId:kAppId];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
facebook.accessToken = [defaults objectForKey:ACCESS_TOKEN_KEY];
facebook.expirationDate = [defaults objectForKey:EXPIRATION_DATE_KEY];

And finally, if you want to post without a dialog you would do this

NSString *message = @"Visit my blog http://effectivemobility.blogspot.com/";
NSArray *obj = [NSArray arrayWithObjects:message, nil];
NSArray *keys = [NSArray arrayWithObjects:@"message", nil];

// There are many other params you can use, check the API
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjects:obj forKeys:keys];

[facebook requestWithGraphPath:@"me/feed" andParams:params andHttpMethod:@"POST" andDelegate:nil];

I hope that helps