ios - 在 SwiftUI 中调出 Google 登录屏幕

Question

我正在使用 Google 登录屏幕和 swiftUI，但我的日志中不断收到一堆我不太理解的消息 - 现在我可以接受这些日志，但我遇到的问题是我不能多次调用同一个函数...

import SwiftUI
import GoogleSignIn

class GoogleStuff: UIViewController, GIDSignInDelegate, ObservableObject {
    
    var googleSignIn = GIDSignIn.sharedInstance()
    var googleId = ""
    var googleIdToken = ""
    var googleFirstName = ""
    var googleLastName = ""
    var googleEmail = ""
    var googleProfileURL = ""
    
    func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!) {
        
        guard user != nil else {
            print("Uh oh. The user cancelled the Google login.")
            return
        }
        
        print("TOKEN => \(user.authentication.idToken!)")

        
    }
    
    func sign(_ signIn: GIDSignIn!, didDisconnectWith user: GIDGoogleUser!, withError error: Error!) {
        
        guard user != nil else {
            print("Uh oh. The user cancelled the Google login.")
            return
        }
        
        print("TOKEN => \(user.authentication.idToken!)")
        
    }
}

struct ContentView: View {
    
    let googleSignIn = GIDSignIn.sharedInstance()
    
    @ObservedObject var myGoogle = GoogleStuff()
    
    @State private var signedIn = false
    @State private var buttonLabel = "Google Sign In"
            
    var body: some View {
        VStack {
                             
            Button(action: {
                self.signedIn.toggle()
                self.buttonLabel = self.signedIn ? "Google Sign In" : "Google Sign Out"
                
                self.googleSignIn?.presentingViewController = UIApplication.shared.windows.last?.rootViewController
                self.googleSignIn?.clientID = "MY_TOKEN_GOES_HERE" //It is just a playground for now
                self.googleSignIn?.delegate = self.myGoogle
                self.googleSignIn?.signIn()
            }) {
                HStack {
                    Image("GLogo")
                        .resizable()
                        .frame(width: 40, height: 40, alignment: .center)
                    Text(buttonLabel)
                    .foregroundColor(.blue)
                    .font(.title)
                    .font(.custom("Roboto-Thin", size: 20))
                }
                .padding()
                .border(Color.black, width: 3)
            }
        }
    }
}

我收到的错误信息是:

2020-01-03 10:25:14.490522+1300 gsignin[34333:10734362] [AXRuntimeCommon] This class 'SwiftUI.AccessibilityNode' is not a known serializable element and returning it as an accessibility element may lead to crashes

2020-01-03 10:25:14.789926+1300 gsignin[34333:10734511] [AXRuntimeCommon] Unknown client: gsignin

2020-01-03 10:25:16.539753+1300 gsignin[34333:10734362] Keyboard cannot present view controllers (attempted to present <SFAuthenticationViewController: 0x7f8a8a842200>)

问题 1: 我应该担心这个吗:[AXRuntimeCommon] Unknown client: gsignin

问题 2:收到此消息后，登录屏幕第一次出现，但此后任何时候都不会出现... Keyboard cannot present view controllers (attempted to present <SFAuthenticationViewController: 0x7f8a8a842200>)

如何修复这些消息？目前我一事无成。

附言。我不介意多做一些阅读/研究，但请保持友善 - 我是 swift 的新手:-D

Answer 1

改变自:

self.googleSignIn?.presentingViewController = 
UIApplication.shared.windows.last?.rootViewController

收件人:

self.googleSignIn?.presentingViewController = 
UIApplication.shared.windows.first?.rootViewController

成功了。