IOS5 Facebook集成 - 未调用fbDidLogin

Question

我花了几天时间通过应用程序做一个简单的Facebook帖子。我使用了这个tutorial，发现没有调用fbDidLogin。由于我一直在寻找解决方案，我发现this是一种使fbDidLogin被调用的方法。

启发我可能会错过的内容。

这里附有我app delegate中FB集成的基本方法。

App delegate.m

@synthesize window = _window;
@synthesize wallSnapVC = _wallSnapVC;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.

    self.wallSnapVC = [self.window.rootViewController.storyboard instantiateViewControllerWithIdentifier:@"wallSnapViewController"];
    self.window.rootViewController = self.wallSnapVC;
    [self.window makeKeyAndVisible];

    return YES;
}

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

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