在我的应用中，我实施了Google登录。我试图得到它，以便当用户在按下谷歌登录按钮后获得授权，并且已成功登录后，用户将被带到新的标签控制器。到目前为止，这是有效的，但只有在我登录后关闭应用程序。所以基本上问题是用户没有被直接带到标签栏控制器。
此外，如果授权过程应该花费这么长时间，或者应该是这样的话，我希望你能告诉我如何显示活动指示器，以便用户知道该过程需要而
提前致谢！
以下是一段简短视频：
ViewController.swift代码：
import UIKit
import Firebase
import GoogleSignIn
class ViewController: UIViewController, GIDSignInUIDelegate {
override func viewDidLoad() {
super.viewDidLoad()
setupGoogleButtons()
}
fileprivate func setupGoogleButtons() {
//add google sign in button
let googleButton = GIDSignInButton()
googleButton.frame = CGRect(x: 16, y: 116 + 66, width: view.frame.width - 32, height: 50)
view.addSubview(googleButton)
//custom google button
let customButton = UIButton(type: .system)
customButton.frame = CGRect(x: 16, y: 116 + 66 + 66, width: view.frame.width - 32, height: 50)
customButton.backgroundColor = .orange
customButton.setTitle("Custom Google Sign In", for: .normal)
customButton.addTarget(self, action: #selector(handleCustomGoogleSign), for: .touchUpInside)
customButton.setTitleColor(.white, for: .normal)
customButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: 14)
view.addSubview(customButton)
GIDSignIn.sharedInstance().uiDelegate = self
}
func handleCustomGoogleSign() {
GIDSignIn.sharedInstance().signIn()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
AppDelegate代码：
import UIKit
import Firebase
import GoogleSignIn
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, GIDSignInDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
FIRApp.configure()
GIDSignIn.sharedInstance().clientID = FIRApp.defaultApp()?.options.clientID
GIDSignIn.sharedInstance().delegate = self
if GIDSignIn.sharedInstance().hasAuthInKeychain() {
print("User has been successfully signed in with Google")
let sb = UIStoryboard(name: "Main", bundle: nil)
if let tabBarVC = sb.instantiateViewController(withIdentifier: "TabController") as? UITabBarController {
window!.rootViewController = tabBarVC
}
} else {
print("User has failed in signing in with Google")
let sb = UIStoryboard(name: "Main", bundle: nil)
if let tabBarVC = sb.instantiateViewController(withIdentifier: "LogInViewController") as? ViewController {
window!.rootViewController = tabBarVC
}
}
return true
}
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", user)
guard let idToken = user.authentication.idToken else { return }
guard let accessToken = user.authentication.accessToken else { return }
let credentials = FIRGoogleAuthProvider.credential(withIDToken: idToken, accessToken: accessToken)
FIRAuth.auth()?.signIn(with: credentials, completion: { (user, error) in
if let err = error {
print("Failed to create a Firebase User with Google account: ", err)
return
}
guard let uid = user?.uid else { return }
print("Successfully logged into Firebase with Google", uid)
})
}
func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
GIDSignIn.sharedInstance().handle(url,
sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String!,
annotation: options[UIApplicationOpenURLOptionsKey.annotation])
return true
}
func applicationWillResignActive(_ application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
}
func applicationDidEnterBackground(_ application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(_ application: UIApplication) {
// Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(_ application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(_ application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}