ios - Swift - uiDelegate 必须是 UIViewController 或实现 signIn :presentViewController: & signIn:dismissViewController: methods

Question

从 Crashlytics，我们在 Google 登录过程中收到大量崩溃报告。崩溃报告如下:

Fatal Exception: NSInvalidArgumentException
uiDelegate must either be a |UIViewController| or implement the |signIn:presentViewController:| and |signIn:dismissViewController:| methods from |GIDSignInUIDelegate|.

Fatal Exception: NSInvalidArgumentException
0  CoreFoundation                 0x1837f2db0 __exceptionPreprocess
1  libobjc.A.dylib                0x182e57f80 objc_exception_throw
2  CoreFoundation                 0x1837f2cf8 -[NSException initWithCoder:]
3  Hello English                  0x100583d18 -[GIDSignIn assertValidUIDelegate] (GIDSignIn.m:512)
4  Hello English                  0x1005861dc -[GIDSignIn signInWithOptions:] (GIDSignIn.m:961)
5  Hello English                  0x10058a0e4 -[GIDSignInButton pressed] (GIDSignInButton.m:385)
6  UIKit                          0x188988be8 -[UIApplication sendAction:to:from:forEvent:]
7  UIKit                          0x188988b64 -[UIControl sendAction:to:forEvent:]
8  UIKit                          0x188970870 -[UIControl _sendActionsForEvents:withEvent:]
9  UIKit                          0x188988454 -[UIControl touchesEnded:withEvent:]
10 UIKit                          0x188988084 -[UIWindow _sendTouchesForEvent:]
11 UIKit                          0x188980c20 -[UIWindow sendEvent:]
12 UIKit                          0x18895104c -[UIApplication sendEvent:]
13 UIKit                          0x18894f628 _UIApplicationHandleEventQueue
14 CoreFoundation                 0x1837a909c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
15 CoreFoundation                 0x1837a8b30 __CFRunLoopDoSources0
16 CoreFoundation                 0x1837a6830 __CFRunLoopRun
17 CoreFoundation                 0x1836d0c50 CFRunLoopRunSpecific
18 GraphicsServices               0x184fb8088 GSEventRunModal
19 UIKit                          0x1889ba088 UIApplicationMain
20 Hello English                  0x10029b2cc main (AppDelegate.swift:26)
21 libdispatch.dylib              0x18326e8b8 (Missing)

到目前为止我们已经尝试过:

1. 将 GIDSignIn.sharedInstance().uiDelegate = self 从 viewDidLoad() 移动到 viewDidAppear(animated: Bool)
2. 我们还实现了 GIDSignInUIDelegate 的所有三种方法，但没有成功。
3. 我们的 View Controller 不是 UIViewController 的直接子级，但现在它是并且崩溃仍在计数。
4. 我们使用的是简单的 UIButton，因此我们认为这可能是导致崩溃的原因(虽然不合逻辑，但我们尝试过)；我们将其更改为 GIDSignInButton，但没有减少崩溃次数。

目前我们已经删除了 Google Login 过程，但这不是解决方案。奇怪的是，我们最终无法重现这次崩溃；我们仅在 Crashlytics 上遇到这些崩溃。

所以有人有任何解决方案吗？

Answer 1

经过一番努力终于找到了解决办法。我的环境是

swift 3，

iOS 10.3.x,

Xcode 8.3.2

在这里发布一个完整的解决方案

import UIKit
import GoogleSignIn

class ViewController: UIViewController, GIDSignInUIDelegate, GIDSignInDelegate {

    @IBOutlet weak var signInButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()

        // set delegates
        GIDSignIn.sharedInstance().delegate = self
        GIDSignIn.sharedInstance().uiDelegate = self

        let buttonFrame : CGRect = CGRect.init(x: 0, y: 0, width: 100, height: 50)
        let gdSignInButton = GIDSignInButton.init(frame:buttonFrame)
        gdSignInButton.center = view.center
        view.addSubview(gdSignInButton)

        //  gdSignInButton.addTarget(self, action: #selector(self.didTapSignOut(sender: self.gdSignInButton)), for: UIControlEvents.touchUpInside)
    }

    @IBAction func didTapSignOut(sender: GIDSignInButton) {
        GIDSignIn.sharedInstance().signOut()
    }

    func sign(inWillDispatch signIn: GIDSignIn!, error: Error!) {

        guard error == nil else {

            print("Error while trying to redirect : \(error)")
            return
        }

        print("Successful Redirection")
    }


    //MARK: GIDSignIn Delegate

    func sign(_ signIn: GIDSignIn!, didSignInFor user: GIDGoogleUser!, withError error: Error!)
    {
        if (error == nil) {
            // Perform any operations on signed in user here.
            let userId = user.userID                  // For client-side use only!
            print("User id is \(userId)")

            let idToken = user.authentication.idToken // Safe to send to the server
            print("Authentication idToken is \(idToken)")
            let fullName = user.profile.name
            print("User full name is \(fullName)")
            let givenName = user.profile.givenName
            print("User given profile name is \(givenName)")
            let familyName = user.profile.familyName
            print("User family name is \(familyName)")
            let email = user.profile.email
            print("User email address is \(email)")
            // ...
        } else {
            print("ERROR ::\(error.localizedDescription)")
        }
    }

    // Finished disconnecting |user| from the app successfully if |error| is |nil|.
    public func sign(_ signIn: GIDSignIn!, didDisconnectWith user: GIDGoogleUser!, withError error: Error!)
    {

    }



}

我的 AppDelegate 看起来像这样。

import UIKit
import Google
import GoogleSignIn

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        // Initialize sign-in
        var configureError: NSError?
        GGLContext.sharedInstance().configureWithError(&configureError)
        assert(configureError == nil, "Error configuring Google services: \(configureError)")



        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:.
    }


    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        return GIDSignIn.sharedInstance().handle(url as URL!,
                                                 sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String, annotation: options[UIApplicationOpenURLOptionsKey.annotation])
    }


}