ios - Firebase AuthUI - 查找现有用户还是新用户

Question

我正在使用 firebase AuthUI 来注册/登录用户。根据用户是新用户还是现有用户，我需要将他们重定向到不同的 View Controller 。 firebase 是否提供检查该功能的功能？

这是我当前的代码，无论新用户还是注册用户，都会转到“signUpSegue”

@IBAction func phoneNumberLoginAction(_ sender: AnyObject) {
    FUIAuth.defaultAuthUI()?.delegate = self as FUIAuthDelegate
    let phoneProvider = FUIPhoneAuth.init(authUI: FUIAuth.defaultAuthUI()!)
    FUIAuth.defaultAuthUI()?.providers = [phoneProvider]
    // 1
    print("clicked butto")
    guard let authUI = FUIAuth.defaultAuthUI()
        else { return }

    // 2
    authUI.delegate = self as FUIAuthDelegate

    // 3
    let authViewController = authUI.authViewController()
    present(authViewController, animated: true)
}

@available(iOS 10.0, *)
extension WelcomeViewController: WelcomePageViewControllerDelegate, FUIAuthDelegate {
func authUI(_ authUI: FUIAuth, didSignInWith user: User?, error: Error?) {
    print("handle user signup / login")

    performSegue(withIdentifier: "signUpSegue", sender: nil)
}

func welcomePageViewController(_ welcomePageViewController: WelcomePageViewController,
                                didUpdatePageCount count: Int) {
    pageControl.numberOfPages = count
}

func welcomePageViewController(_ welcomePageViewController: WelcomePageViewController,
                                didUpdatePageIndex index: Int) {
    pageControl.currentPage = index
}

Answer 1

没有记录，但有一个回调函数 didSignInWithAuthDataResult 返回 AuthDataResult它提供了一种通过 additionalUserInfo.newUser 判断用户是新用户还是现有用户的方法。

https://github.com/firebase/FirebaseUI-iOS/blob/a69aa9536a0f5312bdd2d408a761c7dd21698015/FirebaseAuthUI/FUIAuth.h#L54