在AngularJS中,ng-controller是最常用的directive。比如:
var app = angular.module("app",[]);app.controlle("AppCtrl", function(){ var app = this; app.people = [ {"firstName":"", "lastName":""}, ... ];})app.controller("FirstCtrl", function(){ var first = this; first.message = "i am the first one";})app.controller("SecondCtrl", function(){ var second = this; second.message = "i am the second one";})
页面部分:
<body ng-controller="AppCtrl as app"> <div ng-controller="FirstCtrl as first"> {{first.message}} </div> <div ng-controller="SecondCtrl as second"> {{second.message}} </div></body>
现在模拟一个ng-controller的directive
app.directive("myController", function(){ return { scope: true, controller: '@' }})
可见,my-controller和ng-controlller工作原理是一样的。
页面部分使用my-controller
<body my-controller="AppCtrl as app"> <div my-controller="FirstCtrl as first"> {{first.message}} </div> <div my-controller="SecondCtrl as second"> {{second.message}} </div></body>
所有的页面呈现都不变。
如果我们想让自定义的my-controller替代AngularJS默认的ng-controller,可以使用priority属性:
app.directive("myController", function(){ return { scope: true, controller: '@', priority: 500 }})
默认的priority字段值是0.
原标题:AngularJS中的ng
关键词:JS