如何在AngularJS中创建全局变量

我遇到这个问题，当您注册时，您会进入“用户”页面。它应该说“欢迎”用户名没有出现在网页上，原因我不确定......请帮助这里是plunkr：

http://plnkr.co/edit/qB3Gkeq5ji1YQyy0kpGH?p=preview http://plnkr.co/edit/qB3Gkeq5ji1YQyy0kpGH?p=preview

请我需要帮助..

我需要获取一些 plunker 的代码，所以： 脚本.js：

var app = angular.module('LoginApp', ["firebase", "ngRoute"])

app.config(function ($routeProvider) {
    $routeProvider
      .when('/', {
        templateUrl: 'registration.html',
        controller: 'AuthCtrl'
      })
      .when('/logIn', {
        templateUrl: 'login.html',
        controller: 'AuthCtrl'
      })

      .when('/User', {
        templateUrl: "User.html",
        controller: 'AuthCtrl'
      })
      .otherwise({
        redirectTo: '/'
      });


  });


app.factory("Auth", ["$firebaseAuth",
  function($firebaseAuth) {
    var ref = new Firebase("https://uniquecoders.firebaseio.com/");
    return $firebaseAuth(ref);
  }
]);


app.controller("AuthCtrl", ["$scope", "Auth",
  function($scope, Auth) {


      $scope.createUser = function() {

        $scope.message = null;
        $scope.error = null;
    var ref2 = new Firebase("https://uniquecoders.firebaseio.com/");
  ref2.createUser({
    email: $scope.email,
    password: $scope.password
  }, function(error, userData) {
    if (error) {
      switch (error.code) {
        case "EMAIL_TAKEN":
          alert("The new user account cannot be created because the email is already in use. Try to login");
          break;
        case "INVALID_EMAIL":
          alert("The specified email is not a valid email.");
          break;
        case "INVALID_PASSWORD":
          alert("The Specified Passowrd Is not valid.")
          break;
        default:
          alert("Error creating user:", error);
      }
    } else {
      alert("Successfully created user account with uid:", userData.uid);
      alert($scope.UserName)

      window.location.hash = "/User"
       $scope.usernames = "HEY"
    }
  });


      };

       $scope.logIn = function(){
        $scope.message = null;
        $scope.error = null;

        ref2.authWithPassword({
          "email" : $scope.logInemail,
          "password" : $scope.logInemailpassword

        }, function(error, userData){

          if(error){
            alert("Login Failed.")
            console.log(error)
          }
          else{
            alert("Logged In!")
          }

        })

      }

  /*  $scope.removeUser = function() {
      $scope.message = null;
      $scope.error = null;

      Auth.$removeUser({
        email: $scope.email,
        password: $scope.password
      }).then(function() {
        $scope.message = "User removed";
      }).catch(function(error) {
        $scope.error = error;
      });
    };*/
  }
]);

当您的应用程序更改路由时，它会破坏旧控制器的作用域并创建新的作用域。即使您对旧路线和新路线使用相同的控制器，也会发生这种情况。

将持久数据存储在您的Auth工厂以及创建该数据的函数。

app.factory("Auth", ["$firebaseAuth",
  function($firebaseAuth) {
    var AuthObj = {};
    //Store persistent data on AuthObj
    AuthObj.ref = new Firebase("https://uniquecoders.firebaseio.com/");
    AuthObj.createUser = function(email,password) {
        AuthObj.ref.createUser(
            {email: email, password: password },
            function(error, userData) {
                if (error) {
                    //process error
                } else {
                    //store data on AuthObj
                    AuthObj.userData = userData;
                }
             }
        );
        return AuthObj.userData;
    };
    //return AuthObj which holds functions and data
    return AuthObj;
  }
]);

使用您的控制器invoke这些功能和retrieve持久数据。

app.controller("AuthCtrl", ["$scope", "Auth",
  function($scope, Auth) {
     //retrieve userData
     $scope.userData = Auth.userData;
     $scope.createUser = function() {
          if ($scope.userData) {
              return;
          } else {
              $scope.userData =
                   //invoke function in factory
                   Auth.createUser($scope.email,$scope.password);
          };
     };
   }
]);

这样，当您更改路线时，数据就会保留下来。