从一个控制器访问另一个控制器的数据

naik3 发表于 Dev

奈克3

我被卡住了，任何人都可以帮助我。这是代码。我正在编写grabData服务以从URL获取数据。然后在控制器firstcontroller中，我正在根据搜索框过滤数据：这是代码：

.factory("grabData",['$http',function($http){
    return{
        showData:function(){
            return $http.get("/http://localhost:5555/sampleData.json");
        }
    }
}])
.controller('firstController',function($scope, $filter,grabData) {
         grabData.showData().success(function(data){
         $scope.items = data;
         $scope.items1 = $scope.items;

         $scope.$watch('search', function(val){
              $scope.items = $filter('filter')($scope.items1, val);
         });
}

HTML代码是： <div ng-controller="firstController"> <input type="text" ng-model="search"> </div>

谁能帮我在下一个控制器中显示$ scope.items：

.controller('secondcontroller',function($scope){
   // Here I want to use $scope.items , from first controller
})
.controller('thirdcontroller',function($scope){
   // Here I want to use $scope.items , from first controller
})
.controller('fourthcontroller',function($scope){
   // Here I want to use $scope.items , from first controller
})

谁能帮助解决这个问题。

苏曼·巴里克（Suman Barick）

这样写你的服务，

.service("grabData",['$http', '$q', function($http, $q){

    var sampleData = null;
    var filteredData = null;

    this.showData = function () {
        var deferred = $q.defer();

        if(sampleData!=null){  
           //if data has already been fetched from server before, serve it
            deferred.resolve(sampleData)
        } 
        else {   
            //else, fetch the data from server, and store it for future use
            $http.get("/http://localhost:5555/sampleData.json").then(function(res){
              sampleData = res.data;
              deferred.resolve(sampleData);
            })
        }
        return deferred.promise;
     };

     //call this from controller1, inside your watch
     this.setFilteredData = function(data){
        filteredData = data;
     };

     //call this from other 2 controllers
     this.getFilteredData = function(){
       return filteredData;
     };


    }])

然后像这样修改您的控制器，

.controller('secondcontroller',function($scope, grabData){
   // do whatever you want to do with grabData
   //use that "grabData.showData().success" pattern as it is still a promise
})
.controller('thirdcontroller',function($scope, grabData){
   // do whatever you want to do with grabData
   // call grabData.getFilteredData() from here
})
.controller('fourthcontroller',function($scope, grabData){
   // do whatever you want to do with grabData
   // call grabData.getFilteredData() from here
})

希望能帮助到你。如有疑问，请在评论中提问。

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