Question

如果变量是一个数组，那么我能够将对象推入其中并获取控制器内的值，但是如果将对象直接分配给该变量，我无法做到这一点

请有人帮助我实现这一目标。

这是小提琴链接

Angular Code：

//angular.js example for factory vs service
var app = angular.module('myApp', []);

app.factory('testFactory', function(){
     var countF={};//= [{abc:'aaa'}];
    return {

        getCount : function () {

            return countF;
        },
        incrementCount:function(){
          //countF.push({aaaa:'jshfdkjsf'});
           countF={aaaa:'jshfdkjsf'};
            //return countF;
        }
    }               
});

function FactoryCtrl($scope,testFactory)
{
    $scope.countFactory = testFactory.getCount();
    $scope.clickF = function () {
       testFactory.incrementCount();
       // console.log($scope.countFactory);
    };
}

HTML代码：

<div ng-controller="FactoryCtrl">

    <!--  this is never updated after count is changed! -->
    <p> This is my countFactory variable : {{countFactory}}</p>

    <p> This is my updated after click variable : {{countF}}</p>

    <button ng-click="clickF()" >Factory ++ </button>
</div>

Answer 1

如评论中所述，问题在于引用，但这里是黑客：

//angular.js example for factory vs service
var app = angular.module('myApp', []);
app.factory('testFactory', function(){
    var countF={};//= [{abc:'aaa'}];
    var getCountF = function(){
        return countF;
    };
    var setCountF = function(arg){
        countF = arg;
    };
    return {

    getCount : getCountF,
    setCount : setCountF,

    incrementCount:function(){
        //countF.push({aaaa:'jshfdkjsf'});
        countF={aaaa:'jshfdkjsf'};
        //return countF;
    }
}
});

function FactoryCtrl($scope,testFactory)
{
    $scope.countFactory = testFactory.getCount();
    $scope.clickF = function () {
        testFactory.incrementCount();
        // console.log($scope.countFactory);
    };
}

Quick Fiddle

Answer 2

您的问题在此代码中 -

 incrementCount:function(){
        //countF.push({aaaa:'jshfdkjsf'});
        countF={aaaa:'jshfdkjsf'};
        //return countF;
 }

这里你没有初始化你正在重新创建的countF对象的aaa属性

初始化 - countF = {};

添加属性 -

  right `countF.aaa = "value";`

  wrong `countF = { aaa : 'value' }`

解决方案 -

incrementCount:function(){
    countF.aaaa = 'jshfdkjsf';
 }

无法将值赋给Angular工厂内的变量？

2 个答案: