facebook登录使用FBloginView未在ios 6中显示

Question

我正在尝试使用FBloginView为facebook创建登录按钮.以下是我写的代码.

- (void)viewDidLoad
{
[super viewDidLoad];

if(!loginview)
    loginview = [[FBLoginView alloc] initWithPermissions:[NSArray arrayWithObject:@"publish_actions, user_photos,status_update"]]; // Whatever permissions you need

loginview.frame = self.view.bounds; //whatever you want

loginview.delegate = self;

[self.view addSubview:loginview];
// Do any additional setup after loading the view from its nib.
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (void)loginViewShowingLoggedInUser:(FBLoginView *)loginView {

NSLog(@"Logged In");

}

- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                        user:(id<FBGraphUser>)user {
NSLog(@"user Id %@",user.id);

}
- (void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView {
// Called after logout
NSLog(@"Logged out");
}

但它没有显示登录按钮.我的代码有什么问题.在控制台中我被"注销"了.

Answer 1

我添加了FacebookSDKResources.bundle,但我仍然在xcode输出窗格中出现错误"界面构建器中的未知类FBLoginView".

为了解决这个问题,我在didFinishLaunchingWithOptions中添加了以下行:

[FBLoginView class];

这在https://developers.facebook.com/ios/login-ui-control/中有解释.