Question

i need to use the facebook api:
in the appdelegate.m I have this code:

// Initialize Facebook
facebook = [[Facebook alloc] initWithAppId:@"MY_TOKEN" andDelegate:self];

// Check and retrieve authorization information
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) {
    facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
    facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
}

after, in another view I have this:

AppDelegate* dlg = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSArray *permissions = [[NSArray alloc] initWithObjects:@"offline_access", nil];

if (![[dlg facebook] isSessionValid]) {
    [[dlg facebook] authorize:permissions];
}

and works fine: call safari with the authorization to use my app, I click Ok to authorize and my app is called again… my app visualize the last view before the authorize, but the event

- (void)fbDidLogin
{
    NSLog(@"fbDidLogin");
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:[facebook accessToken] forKey:@"FBAccessTokenKey"];
    [defaults setObject:[facebook expirationDate] forKey:@"FBExpirationDateKey"];
    [defaults synchronize];
}

in AppDelegate.m (my appdelegate have FBSessionDelegate) is not fired (also the other events of FBSessionDelegate like fbDidNotLogin are not fired…

where is my error?
thanks in advance

Answer 1

I think you forgot about this two methods and perhaps forgot to add your Facebook app id to URL types in info file. for more detail

// Pre 4.2 support

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
    return [facebook handleOpenURL:url]; 
}

// For 4.2+ support

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
    sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
    return [facebook handleOpenURL:url]; 
}