30-依赖注入

来源：互联网发布：人物简笔画软件编辑：程序博客网时间：2024/05/29 16:32
<!--     AngularJS 提供很好的依赖注入机制。以下5个核心组件用来作为依赖注入：        value        factory        service        provider        constant--><html>   <head>      <meta charset="utf-8">      <title>AngularJS  依赖注入</title>   </head>   <body>      <h2>AngularJS 简单应用</h2>      <div ng-app = "mainApp" ng-controller = "CalcController">         <p>输入一个数字: <input type = "number" ng-model = "number" /></p>         <button ng-click = "square()">X<sup>2</sup></button>         <p>结果: {{result}}</p>      </div>      <script src="http://cdn.bootcss.com/angular.js/1.4.6/angular.min.js"></script>      <script>         var mainApp = angular.module("mainApp", []);         mainApp.config(function($provide) {            $provide.provider('MathService', function() {               this.$get = function() {                  var factory = {};                  factory.multiply = function(a, b) {                     return a * b;                  }                  return factory;               };            });         });         mainApp.value("defaultInput", 5);         mainApp.service('CalcService', function(MathService){            this.square = function(a) {               return MathService.multiply(a,a);            }         });         mainApp.controller('CalcController', function($scope, CalcService, defaultInput) {            $scope.number = defaultInput;            $scope.result = CalcService.square($scope.number);            $scope.square = function() {               $scope.result = CalcService.square($scope.number);            }         });      </script>   </body></html>
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