如何在FBSDKLoginKit登录后在iOS中获取用户信息？

Question

我创建了一个按钮：

let button = FBSDKLoginButton(frame: CGRectMake(100, 100, 300, 50))
button.readPermissions = ["public_profile", "user_friends"]
view.addSubview(button)

然后点击它，做一些事情来登录。登录后我在哪里接收数据？怎么才能接触到他们？

注意事项

问题是关于FBSDKLoginKit，而不是Facebook-ios-sdk。

Answer 1

登录后接收到的token和userID的简单实现：

func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {

    if error != nil {
        print("error")
    } else if result.isCancelled {
        print("cancelled")
    } else {
        print("token: \(result.token.tokenString)")
        print("user_id: \(result.token.userID)")
    }
}

Answer 2

func returnFBUserData()
{
    let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields":"id, first_name, last_name"])
    graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in

        if ((error) != nil)
        {
            print("Error: \(error)")
        }
        else
        {
            let uniqueId = result.valueForKey("id") as! NSString!
            let firstName = result.valueForKey("first_name") as! NSString!
            let lastName = result.valueForKey("last_name") as! NSString!
            print(uniqueId) // This works
            print(firstName)
            print(lastName)
        }
    })
}

Answer 3

实现loginButton:didCompleteWithResult:error:委托FBSDKLoginKit方法应该允许您访问登录结果，如下所示：

class ViewController: UIViewController, FBSDKLoginButtonDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()

        let button = FBSDKLoginButton(frame: CGRectMake(100, 100, 300, 50))
        button.delegate = self
        button.readPermissions = ["public_profile", "user_friends"]
        view.addSubview(button)
    }

    func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {
        // do stuff with result, get token, userId...
    }

    func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {

    }
}