ios - 我想知道如何将结果中的值传递给另一个 View Controller 。

我想知道如何将结果中的值传递给另一个视图控制器。

func showEmailAddress() -> Void{
    //Adding user to firebase
    let accessToken = FBSDKAccessToken.current()
    guard let accessTokenString = accessToken?.tokenString else //This makes things a littie safer
    {return}

    let credentials = FacebookAuthProvider.credential(withAccessToken: accessTokenString)

    Auth.auth().signIn(with: credentials) { (user, error) in
        if error != nil {
            print("something went wrong with out FB user: ", error ?? "")
            return
        }
        print("Successfully logged in with our user: ", user ?? "")

        UserDefaults.standard.set(user!.email!, forKey: "usersigned")
        UserDefaults.standard.synchronize()

        let delegate : AppDelegate = UIApplication.shared.delegate as! AppDelegate

        delegate.rememberLogin()
    }
    //print("Succesfully loged in with facebook...")
    FBSDKGraphRequest(graphPath: "/me", parameters: ["fields": "id, name, email"]).start { (connection, result, err) in
        //print(123)
        if err != nil{
            print("Failed to start graph request:",err ?? "")
            return
        }
        print("This is the results")
        print(result ?? "")

     let data:[String:AnyObject] = result as! [String : AnyObject]; print(data["name"]!); print(data["id"]!)

        var username = data["name"]!
        var userID = data["id"]!
        //let number = "1234566"
    }
}

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    let DestViewController : menuViewController = segue.destination as! menuViewController
    DestViewController.id = username
}

这些值仅存在于showEmailAddress（）中。有没有办法从函数中提取它们以将用户名和用户ID发送到另一个VC？

最佳答案

使字符串在您的AppDelegate中像

var username = String()
var userid = String()

并在其中获取用户名和用户ID值的位置将其值发送到AppDelegate。使AppDelgate对象如下所示

let appDelegate = UIApplication.shared.delegate as! AppDelegate

将值传递给应用程序委托变量

self.appDelegate.username = "your Value"
self.appDelegate.userid = "your Value"

并按以下方式获取您想要的值

let  string = appDelegate.username as! String
let  string1 = appDelegate.userid as! String

传递的值

关于ios - 我想知道如何将结果中的值传递给另一个 View Controller 。，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44793658/