$rootScope针对全局的作用域生效
$scope只针对当前的controller作用域生效
用下面的例子来证明上述的说法:
定义一个模块名为myApp
var myApp = angular.module('myApp', [])
创建oneController和twoController这两个controller
oneController传入$scope和$rootScope
myApp.controller('oneController', ['$scope', '$rootScope', function ($scope, $rootScope) {
// 局部的变量,只有在oneController中才会显示
$scope.one_language = 'Python'
// 全局的变量,都可以调用
$rootScope.language = 'Go'
}])
twoController只传入$scope
myApp.controller('twoController', ['$scope', function ($scope) {
// 局部的变量,只有在twoController中才会显示
$scope.two_language = 'Java'
}])
HTML标签内容
<span ng-app="myApp">
<style>
div{margin-top: 15pxborder: 2px solid rebeccapurplewidth: 400px}
</style>
<div>
<h3>我是全局变量language: {{ language}}</h3>
</div>
<div ng-controller="oneController">
<h3>我是one_language局部变量: {{ one_language}}</h3>
</div>
<div ng-controller="twoController">
<h1>twoController</h1>
<h3>我是two_language局部变量: {{ two_language }}</h3>
<h3>我是one_language局部变量: {{ one_language}}</h3>
<h3>我是全局变量language: {{ language }}</h3>
</div>
</span>