AngularJs 终极购物车(实例讲解)

废话不多说，直接上代码：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>购物车</title>
  <script src="angularjs/angular.js"></script>
  <style>
    .box{
      width: 100%;
      border-bottom: 1px solid silver;
    }
    .box1{
      width: 100%;
      margin-top: 5px;
    }
    .box1 button{
      width: 100px;
      height: 40px;
      background: crimson;
      color: white;
      text-align: center;
      line-height: 40px;
      float: right;
      border: 0;
      border-radius: 13px;
    }
    table{
      width: 100%;
    }
    tr td button{
      background: blue;
      color: white;
      border: 0;
    }

  </style>
  <script>
    var my=angular.module("my",[]);
    my.controller("mys",function ($scope) {
      /*声明数据对象，初始化商品信息，数据自拟且不低于四条*/
$scope.arr=[
        {name:"qq",price:12.9,number:2,state:false},
        {name:"wx",price:23.9,number:1,state:false},
        {name:"aa",price:99.9,number:1,state:false},
        {name:"bb",price:10.9,number:5,state:false}
      ];
      /*删除条目*/
$scope.del=function (index) {
        if(confirm("确定移除此项嘛？")){
          $scope.arr.splice(index,1);
        }
      }
      /*点击”+”按钮输入框中的数量加1,同时可以计算出商品小计,和购物 车总价*/
$scope.jia=function (index) {
        $scope.arr[index].number++;
      }
      /*当点击”-”按钮时输入框中的数量减1,商品小计和总价*/
$scope.jian=function (index) {
        if($scope.arr[index].number>1){
          $scope.arr[index].number--;
        }
        else if($scope.arr[index].number==1){
          if(confirm("用户是否删除该商品")){
            $scope.arr.splice(index,1);
          }
        }
      }
      /*计算总价格*/
$scope.allSum=function () {
        var allPrice=0;
        for(var i=0;i<$scope.arr.length;i++){
          allPrice+=$scope.<span style="color:#660e7a"><strong>arr</strong></span>[<span style="color:#458383">i</span>].<span style="color:#660e7a"><strong>price</strong></span>*$scope.arr[i].number;
        }
        return allPrice;
      };
      /*清空购物车*/
$scope.alldel=function () {
        if($scope.arr.length==0){
          alert("您的购物车已空");
        }else{
          $scope.arr=[];
        }
      }
      /*用户点击第一个checkbox代表全选，全选商品后点击删除选中商品，选中商品被删除，  若购物车商品被全部删除后*/
$scope.allCheck=false;
      $scope.allx= function () {
        for(var i=0;i<$scope.arr.length;i++){
          if($scope.allCheck==true){
            $scope.arr[i].state=true;
          }else {
            $scope.arr[i].state=false;
          }
        }
      };
      /*每个复选框*/
$scope.itemCheck = function () {
        var flag = 0;
        for(var i = 0; i<$scope.arr.length; i++){
          if($scope.arr[i].state == true){
            flag ++;
          }
        }
        if(flag == $scope.arr.length){
          $scope.allCheck = true;
        }else{
          $scope.allCheck = false;
        }
      };
      /*批量删除*/
$scope.pi=function () {
        for(var i=0;i<$scope.arr.length;i++){
          if($scope.arr[i].state==true){
            $scope.arr.splice(i,1);
            i--;
            $scope.allCheck = false;
          }
        }
      }
    });
  </script>
</head>
<body ng-app="my" ng-controller="mys">
  <div class="box">
    <h2>我的购物车</h2>
  </div>
  <div class="box1">
    <button ng-click="alldel()" style="margin-right: 10px">清空购物车</button><button ng-click="pi()" style="margin-left: 5px">批量删除</button>
  </div>
  <div class="box2">
    <table border="1">
      <tr>
        <th><input type="checkbox" ng-model="allCheck" ng-click="allx()"/></th>
        <th>name</th>
        <th>price</th>
        <th>number</th>
        <th>totalPrice</th>
        <th>option</th>
      </tr>
      <!--用ng-repaet指令将对象遍历并渲染到页面中-->
<tr ng-repeat="item in arr">
        <td><input type="checkbox" ng-model="item.state" ng-click="itemCheck()"/></td>
        <td>{{item.name}}</td>
        <td>{{item.price | currency:"￥："}}</td>
        <td><button ng-click="jian($index)">-</button>
          <input type="text" value="{{item.number}}" style="width: 30px;padding-left: 20px"/>
          <button ng-click="jia($index)">+</button>
        </td>
        <td>{{item.price*item.number | currency:"￥："}}</td>
        <td><button ng-click="del($index)">删除</button></td>
      </tr>
      <tr>
        <td colspan="6">总金额<span ng-bind="allSum()|currency:'￥：'"></span></td>
      </tr>
    </table>
  </div>
</body>
</html>

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