AngularJS控制器和rootScope的多种用途 [英] AngularJS multiple uses of Controller and rootScope
问题描述
我想用一个控制器上2分开的HTML元素，并使用$ rootScope保持2列出了同步，当一个编辑：
I want to use a controller on 2 seperated HTML elements, and use the $rootScope to keep the 2 lists in sync when one is edited:
HTML
<ul class="nav" ng-controller="Menu">
<li ng-repeat="item in menu">
<a href="{{item.href}}">{{item.title}}</a>
</li>
</ul>
<div ng-controller="Menu">
<input type="text" id="newItem" value="" />
<input type="submit" ng-click="addItem()" />
<ul class="nav" ng-controller="Menu">
<li ng-repeat="item in menu">
<a href="{{item.href}}">{{item.title}}</a>
</li>
</ul>
</div>
JS
angular.module('menuApp', ['menuServices']).
run(function($rootScope){
$rootScope.menu = [];
});
angular.module('menuServices', ['ngResource']).
factory('MenuData', function ($resource) {
return $resource(
'/tool/menu.cfc',
{
returnFormat: 'json'
},
{
getMenu: {
method: 'GET',
params: {method: 'getMenu'}
},
addItem: {
method: 'GET',
params: {method: 'addItem'}
}
}
);
});
function Menu($scope, MenuData) {
// attempt to add new item
$scope.addNewItem = function(){
var thisItem = $('#newItem').val();
MenuData.addItem({item: thisItem},function(data){
$scope.updateMenu();
});
}
$scope.updateMenu = function() {
MenuData.getMenu({},function(data){
$scope.menu = data.MENU;
});
}
// get menu data
$scope.updateMenu();
}
在页面加载后，无论是 UL 和 DIV 从数据库中显示正确的内容，但是当我用的是 addNewItem（）方法只在 DIV 得到更新。
When the page loads, both the UL and the DIV display the correct contents from the database, but when i use the addNewItem() method only the DIV gets updated.
有没有更好的方法来组织我的逻辑，或者我可以做一些事情，以确保 $ scope.menu 在 UL 被在同一时间更新？
Is there a better way to structure my logic, or can I do something to make sure the $scope.menu in the UL gets updated at the same time?
下面是类似的例子： http://plnkr.co/edit/2a55gq
推荐答案
我会建议使用保存菜单，其方法的服务。该服务将更新其由控制器（多个）所引用的菜单
I would suggest to use a service that holds the menu and its methods. The service will update the menu which is referenced by the controller(s).
请参阅工作plunker这里： http://plnkr.co/edit/Bzjruq
See a working plunker here: http://plnkr.co/edit/Bzjruq
这是样品的JavaScript code：
This is the sample JavaScript code:
angular
.module( 'sampleApp', [] )
.service( 'MenuService', [ '$rootScope', function( $rootScope ) {
return {
menu: [ 'item 1' ],
add: function( item ) {
this.menu.push( item );
}
};
}])
.controller( 'ControllerA', [ 'MenuService', '$scope', function( MenuService, $scope ) {
$scope.menu = MenuService.menu;
$scope.addItem = function() {
MenuService.add( $scope.newItem );
};
}]);
和样品Html页面：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="utf-8">
<title>Custom Plunker</title>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.0.2/angular.min.js"></script>
<script src="app.js"></script>
</head>
<body ng-app="sampleApp">
<div ng-controller="ControllerA">
<ul>
<li ng-repeat="item in menu">{{item}}</li>
</ul>
<input type="text" ng-model="newItem" /><input type="submit" ng-click="addItem()" />
</div>
<div ng-controller="ControllerA">
<ul>
<li ng-repeat="item in menu">{{item}}</li>
</ul>
</div>
</body>
</html>
这篇关于AngularJS控制器和rootScope的多种用途的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
