一、作用域

AngularJs中的$scope对象是模板的域模型,也称为作用域实例.通过为其属性赋值,可以传递数据给模板渲染.

每个$scope都是Scope类的实例,Scope类有很多方法,用于控制作用域的生命周期、提供事件传播功能,以及支持模板的渲染等.

AngularJs的每个应用程序都有一个$rootScope,它是其他所有作用域的父作用域,它的作用范围从包含ng-app指令的HTML元素开始.它是在新应用启动时自动创建.

二、指令创建作用域

ng-controller指令是作用域创建指令,当在DOM树中遇到作用域创建指令时,AngularJs都会创建Scope类的新实例$scope.新创建的作用域实例$scope会拥有$parent属性,并指向它的父作用域.在DOM树中,会有很多这样的指令创建出很多作用域.

(众多作用域形成了以$rootScope为根的树结构,鉴于DOM树驱动了作用域的创建,作用域树模仿了DOM树的结构)

ng-repeat指令的运用:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body >
<ul ng-app="myApp" ng-controller="WorldCtrl">
<li ng-repeat="country in countries">
{{country.name}} 有 {{country.population}} 人口
</li>
<hr>
世界人口数:{{population}}
</ul> </body>
<script type="text/javascript" src="js/angular.js" ></script>
<script src="js/myapp.js"></script>
<!--<script type="text/javascript" src="js/angularjs.js" ></script>-->
</html>

  

myapp.js

var app = angular.module("myApp",[]);
app.controller('WorldCtrl',function($scope){
$scope.population = 7000;
$scope.countries = [
{name: 'France',population:63.1},
{name: 'UK',population: 61.8},
];
});

测试结果:

ng-repeat指令用来遍历属性值,上面对应每个country,都有个新变量要暴露给$scope,而又没有覆盖之前变量的值;AngularJs中给集合中的每个元素都创建了新的作用域,所以在不同作用域中,定义同名变量,不会造成命名的冲突(不同的DOM元素指向不同的作用域,并使用各自作用域中的变量渲染模板).这相当于集合中每个项目都有自己的命名空间.

三、作用域层级和继承

作用域中定义的属性对于所有子作用域是可见的,只要子作用域中没有定义同名的属性.

实例:

<!DOCTYPE html>
<html ng-app="myApp">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body ng-init="name='world'">
<h1>Hello,{{name}}</h1>
<div ng-controller="HelloCtrl">
Say hello to:<input type="text" ng-model="name">
<h1>Hello,{{name}}!!</h1>
</div>
</body>
<script type="text/javascript" src="js/angular.js" ></script>
<script type="text/javascript" src="js/controller.js" ></script>
</html>

controller.js

var app = angular.module("myApp",[])
app.controller("HelloCtrl", function($scope) {
// $scope.name = "youyi";
});

结果:

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" alt="" />

在父作用域中定义了变量,子作用域中暂时未定义同名变量,可以看到在父作用域中定义的变量在整个应用程序中到处可见.

如果子作用域中有同名属性:

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" 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GiuHObI718ms/0z+02TudZFZw1JAVfOXWRX8fJP7wHvEg6iPOsCs4bkoKr2PJgyK+ephtHG+Y7Z0M6z6rgzCEp2JKNYxD/Cmzz8drNItjFvjXM99hPdp5VwSUR2c19vaKleWPay434hcw0ypdViXTDkmqp0nlWBZfkLP9vgwBwZpAUAMCHpAAAPiQFAPAhKQCAD0kBAHxICgDgQ1IAAB+SAgD4kBQAwIekAAA+JAUA8CEpAICP7txFUgAAB+YUAMCHpAAAPiQFAPDhOgUA8CEpAIAPSQEAfP8H6nwyJ2okhfgAAAAASUVORK5CYII=" 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AngularJs中的作用域继承和JavaScript中的原型继承遵循同样的规则(沿着继承树向上查找属性,直至找到为止)。

改变子作用域中的变量值,不会对负作用域中的同名变量产生影响。

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3DcFHVXsoIzJ77ex6CSDA1oGjzwD6wBrHJA8eceO1dEQdhlBRV0962sI1nJPtV6LrMH3aXOf7ZY89DmdbtuSil70wD00DgMcwGiSJYZ6Hn2LZt2+7Jm+bk0u3+00e5zu2xv9O9w5ObN2Q2cnB2dEyNiZt8OII2onHVdVXsO7fX4d1jWrbtncNrnPZvpGXVAmv18faMNwGBR9ChoyW7vNTKvoliaXqSs8vZu7GKK/flHsO7twz7HLOGehhVmJZ3DqMkKyrB+6k7tslcOGcJFAKB72myi0VeT7p9VcrkEiXF+E+ltUWazfjzaU1V4O+rvA8IfKO4OgfHv376r4QBIA8EBkBjIDAAGgOBAdAYCAyAxkBgADQGAgOgMRAYAI2BwABoDAQGQGMgMAAaA4EB0BgIDIDGQGAANAYCA6AxEBgAjYHAAGgMBAZAYyAwABoDgQHQGAgMgMb8H0Jbv0TVJX+vAAAAAElFTkSuQmCC" alt="" />

通过下面的方式可以让子作用域中影响定义在父作用域中的属性:

但是这种方式是不可靠的,问题在于ng-model指令所用的表达式对DOM结构做了武断的假设,尽量避免使用$parent。

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" alt="" />

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" alt="" />

更好的解决方案:

<!DOCTYPE html>
<html ng-app="myApp">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body ng-init="thing={name:'world'}">
<h1>Hello,{{thing.name}}</h1>
<div ng-controller="HelloCtrl">
Say hello to:<input type="text" ng-model="thing.name">
<h1>Hello,{{thing.name}}!!</h1>
</div>
</body>
<script type="text/javascript" src="js/angular.js" ></script>
<script type="text/javascript" src="js/controller.js" ></script>
</html>
var app = angular.module("myApp",[])
app.controller("HelloCtrl", function($scope) {
$scope.name = "youyi";
});

结果:

aaarticlea/png;base64,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" alt="" />

改变表单中的值结果如下:

aaarticlea/png;base64,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" alt="" />

避免直接绑定变量给作用域属性,对象属性的双向数据绑定是最好的解决方案。

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