为什么我的$ scope属性在我的应用AngularJS一直在CH375复位？ [英] Why my $scope attributes keep reseting in my AngularJS application?

问题描述

我有一个模板由以下AngularJS应用程序（ index.html的），应用程序定义（ app.js ），控制器定义（ controllers.js ），并托管网页（ host.jsp ）。

I have the following AngularJS application composed of a template (index.html), an app definition (app.js), a controller definition (controllers.js) and a hosting page (host.jsp).

在code是如下：

search.jsp的

search.jsp

<div class="container-fluid" ng-app="facetedSearch">
    <div class="row-fluid" ng-view>
    </div>
</div>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.3/angular.min.js"></script>
<script src="/resources/js/page/search/app.js"></script>
<script src="/resources/js/page/search/controllers.js"></script>

app.js

app.js

angular.module('MyApp', []).
  config(['$routeProvider', function($routeProvider) {
  $routeProvider.
     when('/', {templateUrl:'/index.html', controller: MyController}).
     otherwise({redirectTo: '/'});
}]);

controller.js

controller.js

var MyController=['$scope','$http','$location',function ($scope, $http, $location) {
   //do some fancy stuff
   if($scope.myAttribute===undefined){
      $scope.myAttribute=someDataFromHttpRequest;
   }
   $location.search(someParameters);
}];

的index.html和host.jsp未示出为简洁和它们无关。

index.html and host.jsp are not shown for brevity and their irrelevance.

控制器会从Ajax请求一些数据，存储它的一些在 $范围，以避免再次请求它和显示它给用户，并等待输入。当用户选择视图中的一些数据，我更新URL查询部分，以反映选择更改。但我想通过检查以避免后续Ajax请求，如果数据是在 $范围可。

The controller gets some data from Ajax request, stores some of it in the $scope to avoid requesting it again and the shows it to the user and waits for input. When the user selects some data in the view, I update URL query part to reflect selection changes. But I want to avoid subsequent Ajax requests by checking if the data is available in the $scope.

我面临的问题是， $ scope.myAttribute 永远是不确定的。它重置在每次请求。我觉得我滥用AngularJS。任何线索？

The problem I'm facing is that the $scope.myAttribute is always undefined. It resets on every request. I think I'm misusing AngularJS. Any clue?

推荐答案

当你离开一个控制器，范围被摧毁。我会考虑让存储你想要的东西的服务。

When you leave a controller, the scope gets destroyed. I would look into making a service that stores the stuff you want.

angular.module('MyApp', []).
    config(['$routeProvider', function($routeProvider) {
    $routeProvider.
        when('/', {templateUrl:'/index.html', controller: MyController}).
        otherwise({redirectTo: '/'});
}])
.service("myService", function(){
    this.myAttribute = null;
});

var MyController=['$scope','$http','$location', 'myService',function ($scope, $http,         $location, myService) {
   //do some fancy stuff
   if(myService.myAttribute===null){
      myService.myAttribute=someDataFromHttpRequest;
   }
   $location.search(someParameters);
}];

服务用于多个控制器之间共享日期/指令，所以我pretty肯定这是你想要的。

Services are used to share date between multiple controllers/directives so i'm pretty sure it's what you want.

下面是对他们的文档信息：<一href=\"http://docs.angularjs.org/guide/dev_guide.services.creating_services\">http://docs.angularjs.org/guide/dev_guide.services.creating_services

Here's the doc information on them: http://docs.angularjs.org/guide/dev_guide.services.creating_services

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