{{name}} from {{department}}jsfunction GreetCtrl($scope, $rootScope) {//rootScope根作用域$scope.name =_angular的scope对应mvvm的">
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例1
html
<div ng-controller="GreetCtrl">
Hello {{name}}!
</div>
<div ng-controller="ListCtrl">
<ol>
<li ng-repeat="name in names"><!-- 迭代数组 -->
{{name}} from {{department}}
</li>
</ol>
</div>
js
function GreetCtrl($scope, $rootScope) {//rootScope根作用域
$scope.name = 'World';
$rootScope.department = 'Angular';
}
function ListCtrl($scope) {
$scope.names = ['Igor', 'Misko', 'Vojta'];
}
例2
<!doctype html>
<html ng-app>
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="Scope1.css" />
</head>
<body>
<div ng-controller="EventController">
Root scope
<tt>MyEvent</tt> count: {{count}}
<ul>
<li ng-repeat="i in [1]" ng-controller="EventController">
<button ng-click="$emit('MyEvent')"><!-- 向根方向传播 -->
$emit('MyEvent')
</button>
<button ng-click="$broadcast('MyEvent')"><!-- 向叶方向传播 -->
$broadcast('MyEvent')
</button>
<br>
Middle scope
<tt>MyEvent</tt> count: {{count}}
<ul>
<li ng-repeat="item in [1, 2]" ng-controller="EventController">
Leaf scope
<tt>MyEvent</tt> count: {{count}}
</li>
</ul>
</li>
</ul>
</div>
</body>
<script src="js/angular-1.3.0.js"></script>
<script src="Scope2.js"></script>
</html>
function EventController($scope) {
$scope.count = 0;
$scope.$on('MyEvent', function() {
$scope.count++;
});
}
AngularJS的MVC是借助$scope来实现的!!!
$scope是一个POJO
$scope提供了一些工具方法$watch()/$apply()
$scope是表达式的执行环境(作用域)
$scope是一个树形结构,与DOM标签平行
子$scope对象会继承父$scope上的属性和方法
每一个AngularJS应用只有一个根$scope对象,位于ng-app上
$scope可以传播事件,类似于DOM事件,可向上也可向下
$scope不仅是mvc的基础,也是实现双向数据绑定的基础
可用angular.element($0).scope()可获得当前元素上的scope来进行调试
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