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

Question

来自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()转移到viewDidAppear(animated: Bool)
2. 我们还实施了GIDSignInUIDelegate的所有三种方法都没有成功。
3. 我们的视图控制器不是UIViewController的直接孩子，但现在它和崩溃仍在计算中。
4. 我们使用的是简单的UIButton，所以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）;我们将它更改为GIDSignInButton，但没有减少崩溃计数。

目前我们已经删除了Google Login进程，但它不是解决方案。奇怪的是，我们无法在最后重现这次崩溃;我们只是在Crashlytics上遇到这些崩溃。

那么任何有解决方案的人？

Answer 1

最后经过努力找到了解决方案。我的环境是

斯威夫特3，

iOS 10.3.x，

Xcode 8.3.2

在此发布完整的解决方案

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!)
    {

    }



}

而我的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])
    }


}

Answer 2

你需要在viewWillAppear的UIViewController方法中写出这些行。

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(true)

    GIDSignIn.sharedInstance().uiDelegate = self
    GIDSignIn.sharedInstance().delegate = self
}

Answer 3

您需要正确实施Google和firebase的代理 像这样添加

class ViewController: UIViewController, GIDSignInDelegate,GIDSignInUIDelegate    

在ViewDidLoad中添加这些行

GIDSignIn.sharedInstance().uiDelegate = self
GIDSignIn.sharedInstance().delegate = self
GIDSignIn.sharedInstance().signIn()

Answer 4

只需包括以下内容

func sign(_ signIn: GIDSignIn!, dismiss viewController: UIViewController!) {
    print("dismissing Google SignIn")
}

func sign(_ signIn: GIDSignIn!, present viewController: UIViewController!) {
    print("presenting Google SignIn")
}

Answer 5

我的解决方案（iOS 10.0）在我的viewDidAppear：方法中将我的视图控制器指定为ui委托...

-(void)viewDidAppear{
    [super viewDidAppear];
    [GIDSignIn sharedInstance].uiDelegate = self;
}

Answer 6

我也遇到了这个错误，我在两种情况下观察到它：

1. 我为GoogleSignIn按钮创建了一个@IBAction，我在其中包含了这两行： @IBAction func googleSignInButton（_ sender：Any）{GIDSignIn.sharedInstance（）。signIn（）GIDSignIn.sharedInstance（）。uiDelegate = self}

但是uiDelegate的赋值需要在viewDidLoad中，而不是在@IBAction中：

GIDSignIn.sharedInstance().uiDelegate = self

2. 在我的另一种情况下，uiDelegate是一个UIViewController，所以我不需要指定其他方法。和其他海报一样，我确信我遵循了所有指示，但每当我点击Google SignIn按钮时仍然会看到此错误。

根本原因是我创建了一个新的UIViewController类“DoLoginVC.swift”，但我没有将这个自定义类映射到故事板中的UIViewController！疏忽。添加自定义类映射后，一切都开始工作了。

如果您看到此错误，请转到故事板并转到ViewController并验证您是否已在附加的屏幕截图中指定了自定义类。

Answer 7

你需要将这些行添加到viewDidAppear中它对我很有用

override    func    viewDidAppear(_ animated: Bool) {
        GIDSignIn.sharedInstance().delegate    =    self
        GIDSignIn.sharedInstance().uiDelegate    =    self
    }

Answer 8

它只是意味着您必须实现以下委托方法：

GIDSignIn.sharedInstance().delegate = self
GIDSignIn.sharedInstance().uiDelegate = self

你可以在viewDidLoad()中设置它。

---

Special Case

如果您在多个ViewControllers中进行Google登录（例如，在“注册和登录”屏幕中），则必须在更改屏幕时更新代理。为了避免冲突，我建议在viewDidAppear()中设置它。如果您来回切换屏幕，这将使用当前ViewController更新委托引用。

Answer 9

如果您忘记将自定义视图Controller类设置为UIViewController，则会显示此错误。

要执行此操作 - >转到您的故事板 - >选择View Controller - >转到Identity Explorer并将您的类设置为空白

请参阅下图以供参考

View Image