javascript - Angular JS 服务正确设置变量 Javascript undefined

Question

因此，我创建了一个 Angular js 模块，并尝试链接一个服务并使用该服务在整个应用程序中共享变量。一切工作正常，但是当我尝试将 submenu[1] 设置为对象时，它说 submenu[1] 未定义。这是正确的，它尚未创建。但我只想将 submenu[1] 设置为等于一个对象。不明白为什么必须创建它。不知道为什么它说 Uncaught TypeError:无法读取未定义的属性子菜单。我console.log我正在打开的menuArray[key]，它返回未定义。但这也没有意义。

    setSubMenu : function(key, subKey, value){
                        console.log(sharedVariables.menuArray[key]);
                sharedVariables.menuArray[key].subMenu[subKey] = value;
    }

Here is what I have:

    var myModule = angular.module('companiesApp', ['ngResource']).config(function($routeProvider) {
    $routeProvider
        .when ('/', {controller:ListCtrl, template: $('#companies-list').html()})
        .when ('/new', {controller:NewCtrl, template: $('#companies-edit').html()})
        .when('/newMenu/:companyID', {controller:EditMenuCtrl, template: $('#menu-edit').html()})
        .when ('/edit/:companyID', {controller:EditCtrl, template: $('#companies-edit').html()})
        .when ('/editMenu/:companyID', {controller:EditMenuCtrl, template: $('#menu-edit').html()})
        .when ('/settings/:companyID', {controller:SettingsCtrl, template: $('#companies-settings').html()})});


myModule.service('sharedVariables', function(){
    var sharedVariables = { count : 0, originalCount : 0, menuArray : []};
    return{
        getOriginalCount : function(){
            return sharedVariables.originalCount;
        },
      setOriginalCount : function(value){
            sharedVariables.originalCount = value;
        },
        getCount : function(){
            return sharedVariables.count;
        },
        setCount : function(value){
            sharedVariables.count = value;
        },
        getMenu : function(){
            return sharedVariables.menuArray;
        },
        setMenu : function(key, value){
            sharedVariables.menuArray[key] = value;
        },
      setMenuName : function(key,value){
            sharedVariables.menuArray[key].name = value;
        },
        setMenuEndPos : function(key, posLeft, posTop){
            sharedVariables.menuArray[key].endPosLeft = posLeft;
            sharedVariables.menuArray[key].endPosTop = posTop;
        },
        setSubMenu : function(key, subKey, value){
            sharedVariables.menuArray[key].subMenu[subKey] = value;
        }
    };
});

function EditMenuCtrl($scope,$routeParams, $location, sharedVariables){
    var count = 0;
    $scope.companyID = $routeParams.companyID;
    $scope.menuArray = [];
    $.ajax({
        url : "companies.php",
        type : "post",
        data : {
            action : "getMenus",
            id : $routeParams.companyID
        },
        success : function(data,status){
          var responses = JSON.parse(data);
            $('#menu').empty();
            for(i in responses){
                //if the Root Order LI has not been created, create it
                if($('#li-' + responses[i].rootORDER).length == 0){
                    count++;
                    var html = '<li id="li-' + responses[i].rootORDER + '" class="dropdown">' + '<a id="link-' + responses[i].rootORDER;
                    html += '" role="button" class="dropdown-toggle" data-type="text" data-toggle="dropdown">' + responses[i].menuROOT;
                    html += '</a>' + '<ul id="ul-' + responses[i].rootORDER; 
                    html += '" class="dropdown-menu" role="menu" aria-labelledby="dLabel" ><li role="presentation"><a href="javascript:void(0)" onclick="addLITOUL()" role="menuitem"><i class="icon-plus-sign"></i></a></li></ul></li>';
                    $('#menu').append(html);
                    //Record the Start Position of the Element
                    var Start = $('#li-' + responses[i].rootORDER).position();
                    sharedVariables.setMenu(responses[i].rootOrder, {name : responses[i].menuROOT, startPosLeft : Start.left, startPosTop : Start.top, subMenu : []});
                    //Make the Title Editable
                    $('#link-' + responses[i].rootORDER).editable(function(value,settings){
                        var tempID = $(this).attr('id');
                        tempID = tempID.substring(5);
                        sharedVariables.setMenuName(tempID,value);
                        return(value);
                    });
                    //Make the DropDowns and make them draggable
                    $('.dropdown-toggle').dropdown();
                    $('.dropdown').draggable({
                        containment: "#container", 
                        scroll: false, 
                        snap: true,
                        stop: function(event, ui) {
                            var Stoppos = $(this).position();
                            $("#position").text("STOP: \nLeft: "+ Stoppos.left + "\nTop: " + Stoppos.top);
                            var tempID = $(this).attr("id");
                            tempID = tempID.substring(3); //remove li- to get the index into the array
                            sharedVariables.setMenuEndPos(tempID, Stoppos.left, Stoppos.top);
                        }
                    });
                }//end of if
            }//end of (for i in responses)
            sharedVariables.setOriginalCount(count);
            sharedVariables.setCount(count);
            //Fill in the inner UL with it's links
            for(i in responses){
                html = '<li id="' + i + '-' + responses[i].menuTITLE+ '" role="presentation"><a role="menuitem" href="javascript:void(0)">' + responses[i].menuTITLE + '</a>';
                html += '</li>';
                $('#ul-' + responses[i].rootORDER).append(html);
                sharedVariables.setSubMenu(responses[i].rootORDER, responses[i].linkORDER, {name: responses[i].menuTITLE});
            }
        }
    });
    console.log(sharedVariables.getOriginalCount());
}

Answer 1

我敢说您的问题与您使用键 responses[i].rootOrder 和 setSubMenu 调用 setMenu 的事实有关code> 与不同键responses[i].rootORDER。从代码的其余部分来看，responses[i].rootOrder 可能未定义，这应该在其他地方给出奇怪的结果......