angular双向数据绑定实例代码

第一步》》》导入bootstrap的css样式
     <link rel="stylesheet" href="//cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap.min.css">
<!-- 可选的Bootstrap主题文件（一般不用引入） -->
<link rel="stylesheet" href="//cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap-theme.min.css">
第二步》》》导入angular的js文件
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
第三步 >>>>>编写实例代码

    

<div class="panel panel-primary" ng-app="myCart" ng-controller="myCartController"><div class="panel-heading navbar-fixed-top" >购物车头部</div><!--购物车正文开始 --><div class="panel-body" style="margin-top: 40px;"><div class="media-list"><div class="media" ng-repeat="good in cartInfo"><a class="pull-left"><img ng-src="{{good.img}}" class="media-object img-thumbnail" /></a><div class="media-body"><div class="media-heading">{{good.title}}</div><p>价格 : {{good.price}} </p><p>数量:<span class="glyphicon glyphicon-plus" aria-hidden="true" ng-click="jia(good)"></span><input type="number" ng-model="good.num" width="9%" /><span class="glyphicon glyphicon-minus" aria-hidden="true" ng-click="jian(good)"></span></p><p><span class="glyphicon glyphicon-trash icon-large" aria-hidden="true" ng-click="remove(good)"></span></p></div></div></div></div><!--购物车正文结束 --><div class="panel-footer navbar-fixed-bottom"><div class="form-horizontal text-right"><label>总金额: <strong class="text-primary">{{total() | currency}}</strong> </label><label>折扣额: <strong class="text-primary"> {{bill.discount | currency}}</strong> </label><label>实付:    <strong class="text-primary">{{ subTotal() | currency }}</strong> </label></div></div></div>

第四步》》》》》编写js
           1.angualr都是从模块开始的步骤如下
               4.1   创建angular模块 angualr.module('模块名称---ng-app')......js代码如下

var myCart = angular.module("myCart", []);myCart.controller("myCartController", function($scope) {//,{title:'惠普节能台灯',price:'99.00',num:10,img:'img/3.jpg'}$scope.bill = {discount: 0};$scope.cartInfo = [{title: '惠普机械键盘',price: 998.00,num: 1,img: 'img/1.jpg'}, {title: '惠普机械鼠标',price: 668.00,num: 1,img: 'img/2.jpg'}, {title: '惠普节能台灯',price: '99.00',num: 10,img: 'img/3.jpg'},{title: '惠普机械键盘',price: 998.00,num: 1,img: 'img/1.jpg'}, {title: '惠普机械鼠标',price: 668.00,num: 1,img: 'img/2.jpg'}, {title: '惠普节能台灯',price: '99.00',num: 10,img: 'img/3.jpg'}]; /*数量相加函数*/$scope.jia = function(obj) {obj.num = obj.num + 1;}/*相减函数*/$scope.jian = function(obj) {if (obj.num > 1) {obj.num = obj.num - 1;}}/*移除函数*/$scope.remove = function(obj) {for (var i = 0; i < $scope.cartInfo.length; i++) {if (obj.title === $scope.cartInfo[i].title) {$scope.cartInfo.splice(i, 1);}}}/*计算总金额*/$scope.total = function() {var total = 0;for (var i = 0; i < $scope.cartInfo.length; i++) {total += $scope.cartInfo[i].price * $scope.cartInfo[i].num;}return total;}/*实付金额*/$scope.subTotal = function() {return $scope.total() - $scope.bill.discount;}function equalTotal(newValue, oldValue, scope) {//alert(newValue+"---oldValue--"+oldValue);return $scope.bill.discount = newValue > 1000 ? 10 : 0;}$scope.$watch($scope.total, equalTotal);})

运行效果如下》》》》》》