如何解决使用 Google 身份验证登录
我已经在我的应用中通过 Firebase 实现了 Google 身份验证。除了我似乎找不到的一个小问题外,一切都运行顺利。每当用户打开提示他们“使用 Google 登录”的页面(即登录页面或注册页面)时,横幅就会在消失之前暂时出现。我根本不希望它出现,除非用户单击“使用 Google 登录”按钮。我怎样才能摆脱这个?
WelcomeViewController(谷歌登录的视图控制器)
import UIKit
import FirebaseAuth
import Firebase
import FBSDKLoginKit
import GoogleSignIn
class WelcomeViewController: UIViewController,GIDSignInDelegate {
@IBOutlet weak var stackView: UIStackView!
@IBOutlet weak var signInFacebookButton: UIButton!
@IBOutlet weak var signInGoogleButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
setUpGoogleButton()
GIDSignIn.sharedInstance()?.presentingViewController = self
GIDSignIn.sharedInstance().signIn()
}
// SIGN IN WITH GOOGLE
func sign(_ signIn: GIDSignIn!,didSignInFor user: GIDGoogleUser!,withError error: Error!) {
if let err = error {
print("Failed to log into Google: ",err)
return
}
print("Successfully logged into Google")
guard let authentication = user.authentication else { return }
let credential = GoogleAuthProvider.credential(withIDToken: authentication.idToken,accessToken: authentication.accessToken)
Auth.auth().signIn(with: credential,completion: { (user,error) in
if let err = error {
print("Failed to create a Firebase User with Google account: ",err)
return
}
// Successfully logged in
guard let uid = user?.user.uid else { return }
print("Successfully logged into Firebase with Google",uid)
// switch to tab bar controller
let tabBarC = self.storyboard?.instantiateViewController(withIdentifier: "mainTabBarController") as! TabBarController
tabBarC.modalPresentationStyle = .fullScreen
self.present(tabBarC,animated: true,completion: nil)
print("Switched to TabBarController")
})
}
fileprivate func setUpGoogleButton() {
let button = signInGoogleButton
button?.layer.borderWidth = 0
button?.backgroundColor = UIColor.init(red: 130/255,green: 178/255,blue: 189/255,alpha: 1)
button?.layer.cornerRadius = 20.0
button?.tintColor = UIColor.white
button!.addTarget(self,action:
#selector(handleCustomGoogleSignIn),for: .touchUpInside)
GIDSignIn.sharedInstance()?.delegate = self
}
@objc func handleCustomGoogleSignIn() {
GIDSignIn.sharedInstance().signIn()
}
我附上了一个链接,指向发生的事情的屏幕录像。屏幕录制中显示的第二页与下面的代码相同,因此存在相同的问题。感谢您的帮助,谢谢!
https://drive.google.com/file/d/1t4KV0Z6qwfCK56Gf2314wXWhAeQR0wUs/view?usp=sharing
解决方法
那是因为您在 viewDidLoad() 中的代码。您正在实施此方法:
GIDSignIn.sharedInstance().signIn()
这会在视图加载后立即触发登录方法(因为您在 viewDidLoad() 中实现它),这会导致瞬间登录弹出窗口消失。
您应该只在您的 handleCustomGoogleSignIn() 中实现它,而不是在那里实现该方法。
结论,你的 viewDidLoad() 应该是这样的:
override func viewDidLoad() {
super.viewDidLoad()
setUpGoogleButton()
GIDSignIn.sharedInstance()?.presentingViewController = self
}