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AngularJS implementation of shopping cart selection and reverse selection function example sharing

小云云Original: 2018-01-03 11:33:492024browse

This article mainly introduces AngularJS to implement the function of selecting all and inverting the selection in the shopping cart. Friends who need it can refer to it. I hope it can help everyone.

Without further ado, I will post the code directly for you. The specific code is as follows;

<!DOCTYPE html>
<html lang="en" ng-app="testMo">
<head>
 <meta charset="UTF-8">
 <title></title>
 <link rel="stylesheet" href="css/bootstrap.css" rel="external nofollow" >
 <style>
 .p1{
  margin: 20px;
 }
 </style>
</head>
<body>
<p ng-controller="testCtrl" class="p1">
 <h4>angularJS--购物车实现全选/取消全选</h4>
 <button type="button" class="btn btn-info" ng-click="addProduct()">添加商品</button>
 <button type="button" class="btn btn-danger" ng-click="deleteProduct()">删除商品</button>
 <br><br>
 <table class="table table-bordered table-responsive" >
 <thead>
 <td>操作</td>
 <td>check状态</td>
 <td>商品名称</td>
 <td>单价</td>
 <td>数量</td>
 <td>小计</td>
 </thead>
 <tr ng-repeat="p in cart" >
  <td><input type="checkbox" ng-checked="p.checked" ng-click="echoChange(p.id,p.checked,selectAll)"></td>
  <td>{{p.checked}}||{{p.checked}}</td>
  <td>{{p.name}}</td>
  <td>单价：￥{{p.price}}</td>
  <td>数量：<input type="number" ng-model="p.count" min="0" value="p.count"></td>
  <td>小计：￥{{p.sum}}</td>
 </tr>
 </table>
 <br>
 <input type="checkbox" ng-model="selectAll" ng-click="selectAllClick(selectAll)"><span ng-hide="selectAll" >全选</span><span ng-show="selectAll">取消全选</span>
 <br><br>
 已选择<span>{{jishuqi}}</span>件商品，总金额：<span>￥{{ sumTotal }}</span>
</p>
<script src="../js/angular.js"></script>
<script>
 angular.module('testMo',['ng']).controller('testCtrl',function($scope){
// $scope.p1=new Object();
// $scope.p1.price=10;
// $scope.p1.count=1;
 //购物车应该是一个数组
 $scope.selectAll=false;//全选默认为false
 $scope.cart=[{id:0,name:'商品0',price:10,count:5,sum:10,checked:false}];
 $scope.addProduct= function (){
  var p=new Object();
  p.id=$scope.cart.length;
  p.name='商品'+ p.id
  p.price=Math.floor(Math.random()*100);//对数值向下取整
  p.count=1;
  p.sum= p.price* p.count;
  p.checked=false;
  $scope.cart.push({id: p.id,name: p.name,price:p.price,count: p.count,sum: p.sum,checked: p.checked});
  console.log($scope.cart);
 }
 //删除商品
 $scope.deleteProduct= function (){
  $scope.cart.pop();//删除数组中的最后的一个元素，并且返回这个元素，会改变数组里的元素
 }
 //全选按钮check的点击事件
 $scope.selectAllClick= function (sa) {
  for(var i=0;i<$scope.cart.length;i++){
  $scope.cart[i].checked=sa;
  }
 }
 //单个数据的check事件
 $scope.echoChange=function(id,ch,se){
  $scope.cart[id].checked=!ch;
  //当所有都选中时，全选也要被勾选
  var cc=0;//计算当前数组中checked为真的数目
  for(var i=0;i<$scope.cart.length;i++){
//  if($scope.cart[i].checked==true){
//   cc++;
//  }
  $scope.cart[i].checked?cc++:cc;
  }
  $scope.selectAll=(cc==$scope.cart.length);//当为真的数目=数组长度时，证明全部勾选
//  console.log($scope.selectAll);
 }
 //监控数据
 $scope.$watch('cart',function(newValue,oldValue,scope){
  $scope.sumTotal=0; //总计
  $scope.jishuqi=0; //计数器
  for(var i in newValue) {
  var sumN = newValue[i].count * newValue[i].price; //计算出新的结果
  $scope.cart[i].sum = sumN.toFixed(2); //保留两位小数并且把它赋值给元数据;
  if (newValue[i].checked) {
   $scope.sumTotal += sumN;
   $scope.jishuqi++;
//   console.log($scope.sumTotal);
//   console.log($scope.jishuqi);
  }
  }
 },true);
 /*$watch简介:在digest执行时，如果watch观察的的value与上一次执行时不一样时，就会被触发。
  AngularJS内部的watch实现了页面随model的及时更新。
  $watch方法在用的时候主要是手动的监听一个对象，但对象发生变化时触发某个事件。
  $watch(watchFn,watchAction,deepWatch);
  如果不加第三个参数，那么只会监听cart数组，只有当cart引用改变时才会触发,因此当需要监听一些引用对象时需要把第三个参数设置成true。
  */
 });
</script>
</body>
</html>

PS: Let me share with you the code of the angularjs shopping cart. The specific code is as follows Shown:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>购物车</title>
  <script type="text/javascript" src="js/angular.js"></script>
</head>
<body ng-app="product" ng-controller="productController">
<center>
<h2>商品列表</h2>
<p class="container">
  <!--导航栏-->
  <nav>
    <p >
      <p id="bs-example-navbar-collapse-1">
        <p>
          <input type="text" ng-model="search" placeholder="产品名称">   
          　产品价格:
          <select>
            <option>0-1000</option>
            <option>1000-2000</option>
            <option>2000-5000</option>
          </select>   
          <input type="button" style="background:#FF0000" value="全部删除" ng-click="removeAll()">
        </p>
      </p>
    </p>
  </nav><br />
  <table border="1 solid" cellpadding="10" cellspacing="0">
    <thead>
    <tr>
      <th ng-click="sortProduct(&#39;id&#39;)">
        产品编号
        <span></span>
      </th>
      <th ng-click="sortProduct(&#39;name&#39;)">
        产品名称
        <span></span>
      </th>
      <th ng-click="sortProduct( &#39;price&#39;)">
        产品价格
        <span></span>
      </th>
      <th>
        操作
        <span></span>
      </th>
    </tr>
    </thead>
    <tbody>
    <tr ng-repeat="item in productList | filter:{ &#39;name&#39;:search} | orderBy:(orderSign+orderColumn) ">
      <td>
        {{item.id}}
      </td>
      <td>
        {{item.name}}
      </td>
      <td>
        {{item.price | currency:'(RMB)'}}
      </td>
      <td>
         <input type="button" style="background:#FF0000" value="删除"  ng-click="delProduct(item.name)">
      </td>
    </tr>
    </tbody>
  </table>
</p>
<script>
  angular.module('product',[])
    .factory('productList',function(){
      return [
        { id:910,name:"imac",price:15400 },
        { id:80,name:"iphone",price:5400 },
        { id:29,name:"ipad",price:14200 },
        { id:500,name:"ipad air",price:23400 },
        { id:1200,name:"ipad mini",price:22000},
        { id:100,name:"android",price:9990 }
      ]
    })
    .controller('productController',function($scope,productList){
      /*$scope.search = "ipad";//定义一个变量
      alert($scope.search);*/
      $scope.productList=productList
      $scope.orderColumn='name'; //排序字段
      $scope.orderSign='-';   //为空时正序 为负号时倒序
      $scope.sortProduct=function(sortColumn){ //点击列标题排序事件
        $scope.orderColumn=sortColumn;//觉得按照那一列进行排序
        if($scope.orderSign=="-"){
          $scope.orderSign="";
        }else{
          $scope.orderSign='-';
        }
      };
      //删除产品
      $scope.delProduct = function(name){
        //alert(name);
        if(name!=""){
          if(confirm("是否删除"+name+"商品") ){
            var p;
            for (index in $scope.productList) {
              p = $scope.productList[index];
              if(p.name == name){
                $scope.productList.splice(index,1);
              }
            }
          }
        }
      }
      //清空购物车
$scope.removeAll = function(){
if(confirm("你确定要清空购物车所有商品吗?")){
$scope.productList = [];
}
}
    });
</script>
</center>
</body>
</html>

Okay, the code ends here.

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