我正在开发一个使用离子框架的应用程序.这又使用了ui-router.目前,我有一个非常基本的两页应用程序.但是,它会扩大到更大.这时,当我从第一个视图转换到第二个视图时,出现错误.错误说:

TypeError: Cannot read property '1' of null
    at http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:14235:28
    at updateView (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:37839:30)
    at eventHook (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:37786:17)
    at Scope.$broadcast (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:19725:28)
    at $state.transition.resolved.then.$state.transition (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:31686:22)
    at wrappedCallback (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:18429:81)
    at http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:18515:26
    at Scope.$eval (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:19441:28)
    at Scope.$digest (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:19267:31)
    at Scope.$apply (http://localhost:11000/vendor/ionic/release/js/ionic.bundle.js:19547:24) 

我正在使用Ionic Framework的1.0.0 beta 3.我的app.js文件如下所示:

"use strict";

var myApp = angular.module('myApp', ['ionic', 'ngRoute']);

myApp.config(function($stateProvider, $urlRouterProvider) {
  $stateProvider
    .state('intro', { url: '/', templateUrl: 'app/account/welcome.html', controller: 'WelcomeController' })
    .state('login', { url: '/account/login', templateUrl: 'app/account/login.html', controller: 'LoginController '})
  ;

  $urlRouterProvider.otherwise("/");
});

function WelcomeController($scope) {
}

function LoginController($scope) {
}

我的index.html看起来像这样:

    
    
    

    
    

    
    


    
        
        

        
MyApp
    

    
    

welcome.html看起来像这样:

  


  
Welcome
  Login

login.html看起来像这样:

  


  
Login

视图转换得很好.但是,我上面显示的错误令我担忧.我害怕以后它会咬我的屁股.有谁知道会造成什么？有谁知道我怎么解决这个问题？

谢谢!