由于未捕获的异常'NSInvalidArgumentException'而终止应用程序-iOS Google登录 [英] Terminating app due to uncaught exception 'NSInvalidArgumentException' - ios google sign in

问题描述

我正在实施本教程据我所见，作者写道:

在这些示例中，视图控制器是的子类. UIViewController.如果在您的项目中，实现的类 GIDSignInUIDelegate不是UIViewController的子类，实现 signInWillDispatch:error :、 signIn:presentViewController:和 signIn:dismissViewController:GIDSignInUIDelegate的方法 协议.

In these examples, the view controller is a subclass of UIViewController. If, in your project, the class that implements GIDSignInUIDelegate is not a subclass of UIViewController, implement the signInWillDispatch:error:, signIn:presentViewController:, and signIn:dismissViewController: methods of the GIDSignInUIDelegate protocol.

因此，按照他的建议，我写道:

so following his advices I wrote as follows:

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, GIDSignInDelegate {



func application(application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Initialize sign-in
        var configureError: NSError?
        GGLContext.sharedInstance().configureWithError(&configureError)
        assert(configureError == nil, "Error configuring Google services: \(configureError)")

        GIDSignIn.sharedInstance().delegate = self

        return true
}

// [START openurl]
func application(application: UIApplication,
    openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
        return GIDSignIn.sharedInstance().handleURL(url,
            sourceApplication: sourceApplication,
            annotation: annotation)
}
// [END openurl]

@available(iOS 9.0, *)
func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -> Bool {
    return GIDSignIn.sharedInstance().handleURL(url,
        sourceApplication: options[UIApplicationOpenURLOptionsSourceApplicationKey] as! String?,
        annotation: options[UIApplicationOpenURLOptionsAnnotationKey])
}

// [START signin_handler]
func signIn(signIn: GIDSignIn!, didSignInForUser user: GIDGoogleUser!,
    withError error: NSError!) {
        if (error == nil) {
            print("Signed in!")
        } else {
            print("\(error.localizedDescription)")
        }
}
// [END signin_handler]

// [START disconnect_handler]
func signIn(signIn: GIDSignIn!, didDisconnectWithUser user:GIDGoogleUser!,
    withError error: NSError!) {
        // Perform any operations when the user disconnects from app here.
        // [START_EXCLUDE]
        NSNotificationCenter.defaultCenter().postNotificationName(
            "ToggleAuthUINotification",
            object: nil,
            userInfo: ["statusText": "User has disconnected."])
        // [END_EXCLUDE]
}

我还有一个名为LoginScreen.swift的类，其中包含:

I also have a class called LoginScreen.swift that contains:

import UIKit

class LoginScreen: UIViewController, GIDSignInUIDelegate {

     override func viewDidLoad() {
    super.viewDidLoad()
    GIDSignIn.sharedInstance().uiDelegate = self

    // Uncomment to automatically sign in the user.
    GIDSignIn.sharedInstance().signInSilently()

}

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)
    GIDSignIn.sharedInstance().uiDelegate = self

     GIDSignIn.sharedInstance().signInSilently()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func signInWillDispatch(signIn: GIDSignIn!, error: NSError!) {
    print("Nothing!")
}

// Present a view that prompts the user to sign in with Google
func signIn(signIn: GIDSignIn!,
    presentViewController viewController: UIViewController!) {
        self.presentViewController(viewController, animated: true, completion: nil)
}

// Dismiss the "Sign in with Google" view
func signIn(signIn: GIDSignIn!,
    dismissViewController viewController: UIViewController!) {
        self.dismissViewControllerAnimated(true, completion: nil)
}


}

，当我运行该应用程序时，我看到按钮sign in with google.但是当我单击它时，我看到了错误:

and when I run the app I see the button sign in with google. But when I click it, I see the error:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: 'When |allowsSignInWithWebView| is enabled, uiDelegate must
either be a |UIViewController| or implement the
|signIn:presentViewController:| and |signIn:dismissViewController:| 
methods from |GIDSignInUIDelegate|.'

这是什么问题?我以为我包括了必要的方法...

What is the problem here? I thought I included the necessary methods...

============编辑-作为@ emrys57问题的后续解答:

============ EDIT - as a follow up to @emrys57 questions:

我在项目中附加了GoogleService-Info.plist文件:

I have the GoogleService-Info.plist file attached in my project:

当我注释掉3种方法(presentViewController，dismissViewController和signInWillDispatch)时，没有任何变化-我仍然遇到相同的错误.

When I comment out the 3 methods (presentViewController, dismissViewController and signInWillDispatch) nothing changes - I'm still getting the same error..

关于屏幕-这是我的故事板的外观:

About the screens - this is how my storyboard looks like:

并且我想在第三个屏幕上显示google登录按钮.

and I want to display the google log in button on the 3rd screen.

此处的第二个屏幕包含Tutorial，其代码如下:

The second screen here contains a Tutorial and its code is so far as follows:

import UIKit

class Tutorial: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        let background = CAGradientLayer().greenBlue()
        background.frame = self.view.bounds
        self.view.layer.insertSublayer(background, atIndex: 0)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

还有一件事情-当我打开应用程序时，我现在看到了google登录按钮:

And one more thing - when I turn on the app I see now the google login button:

当我单击它时-我遇到了提到的错误:

And when I click it - I'm getting the mentioned error:

2016-02-13 09:47:49.578 myapp[20870:800499] *** Terminating app due
to uncaught exception 'NSInvalidArgumentException', reason: 'When
|allowsSignInWithWebView| is enabled, uiDelegate must either be a
|UIViewController| or implement the |signIn:presentViewController:| and
|signIn:dismissViewController:| methods from |GIDSignInUIDelegate|.'

*** First throw call stack:
(...)

所以我想当我按下按钮时LoginScreen正在运行...

so I guess the LoginScreen is running when I hit the button...

===========另一个

=========== another

当我将代码从LoginScreen复制到类ViewController并在其中添加按钮时-一切正常，我看到一个google登录按钮，可以登录！但是-该按钮出现在应用程序的第一个屏幕上，这不是我想要的.我希望它出现在第三个屏幕上(在教程之后).有人知道这是怎么回事，为什么我不能在第三个屏幕上放置登录按钮吗?

When I copied the code from my LoginScreen to the class ViewController and added button there - everything worked fine, I see a google sign in button and I can log in! BUT - the button appears on the first screen of the app and that's not what I want. I want it to appear on the 3rd screen (after the tutorial). Does anybody know what is going on here and why I can't put the login button on the 3rd screen?

推荐答案

我知道为时已晚，但是如果您将GIDSignIn.sharedInstance().uiDelegate = self放入viewDidAppear而不是viewDidLoad，它将对其他人有所帮助！

I know it's too late but will help for others if you put the GIDSignIn.sharedInstance().uiDelegate = self into viewDidAppear instead viewDidLoad, that's worked for me!

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