Vue+Element+computed实现购物车

Posted 2021-02-13 cinderellastory

本人写的小程序，功能还在完善中，欢迎扫一扫提出宝贵意见！

 

              

 

该购物车效果采用的是Element-ui库实现的。

采用了computed计算属性来实现逻辑操作。

 

功能分析：

1. 全选/全不选/单选。
2. 数量增加、数量减少。
3. 总金额=数量*单价。
4. 商品总价：每一项的总金额相加。
5. 商品总数：每一项的数量相加。
6. 删除功能。

废话不多说，复制粘贴看效果：

 

  1 <template>
  2   <div class="cart">
  3     <div class="group_btn">
  4       <el-button type="success" @click="addDialog">添加</el-button>
  5     </div>
  6     <el-table
  7       :data="tableData"
  8       border
  9       style="width: 100%"
 10       @selection-change="handleSelectionChange"
 11     >
 12       <el-table-column type="selection" width="55" align="center"></el-table-column>
 13       <el-table-column type="index" label="序号" width="180" align="center"></el-table-column>
 14       <el-table-column prop="name" label="类目" width="180" align="center"></el-table-column>
 15       <el-table-column prop="price" label="价格" align="center"></el-table-column>
 16       <el-table-column label="数量" align="center">
 17         <template slot-scope="scope">
 18           <el-input-number v-model="scope.row.number" :min="1" :max="10" label="描述文字"></el-input-number>
 19         </template>
 20       </el-table-column>
 21       <el-table-column label="操作" align="center">
 22         <template slot-scope="scope">
 23           <el-button size="mini" @click="editDialog(scope.$index, scope.row)">编辑</el-button>
 24           <el-button size="mini" type="danger" @click="handleDelete(scope.$index, scope.row)">删除</el-button>
 25         </template>
 26       </el-table-column>
 27     </el-table>
 28     <div class="total_warpper">
 29       <h3>共计：{{totalPrice}}</h3>
 30       <h3>总数：{{totalNumber}}</h3>
 31     </div>
 32     <!-- 添加弹窗的内容 -->
 33     <el-dialog title="添加信息" :visible.sync="addIsDialog" class="addDialog">
 34       <el-form :model="formData">
 35         <el-form-item label="类目" :label-width="formLabelWidth">
 36           <el-input v-model="formData.name" autocomplete="off"></el-input>
 37         </el-form-item>
 38         <el-form-item label="价格" :label-width="formLabelWidth">
 39           <el-input v-model="formData.price" autocomplete="off"></el-input>
 40         </el-form-item>
 41         <el-form-item label="数量" :label-width="formLabelWidth">
 42           <el-input v-model="formData.number" autocomplete="off"></el-input>
 43         </el-form-item>
 44       </el-form>
 45       <div slot="footer" class="dialog-footer">
 46         <el-button @click="addIsDialog = false">取 消</el-button>
 47         <el-button type="primary" @click="addSureBtn">确 定</el-button>
 48       </div>
 49     </el-dialog>
 50     <!-- 添加编辑的内容 -->
 51     <el-dialog title="添加信息" :visible.sync="editIsDialog" class="addDialog">
 52       <el-form :model="editData">
 53         <el-form-item label="类目" :label-width="formLabelWidth">
 54           <el-input v-model="editData.name" autocomplete="off"></el-input>
 55         </el-form-item>
 56         <el-form-item label="价格" :label-width="formLabelWidth">
 57           <el-input v-model="editData.price" autocomplete="off"></el-input>
 58         </el-form-item>
 59         <el-form-item label="数量" :label-width="formLabelWidth">
 60           <el-input v-model="editData.number" autocomplete="off"></el-input>
 61         </el-form-item>
 62       </el-form>
 63       <div slot="footer" class="dialog-footer">
 64         <el-button @click="editIsDialog = false">取 消</el-button>
 65         <el-button type="primary" @click="editSureBtn">确 定</el-button>
 66       </div>
 67     </el-dialog>
 68   </div>
 69 </template>
 70 
 71 <script>
 72 export default {
 73   data() {
 74     return {
 75       editIsDialog: false, //编辑弹窗
 76       addIsDialog: false, //添加弹窗
 77       multipleSelection: [], //存放已选择的数据
 78       formData: {
 79         name: "",
 80         price: "",
 81         number: ""
 82       },
 83       editData: {},
 84       formLabelWidth: "200",
 85       //表格中的数据
 86       tableData: [
 87         {
 88           name: "苹果",
 89           price: 10,
 90           number: 1
 91         },
 92         {
 93           name: "香蕉",
 94           price: 20,
 95           number: 1
 96         },
 97         {
 98           name: "草莓",
 99           price: 5,
100           number: 1
101         }
102       ]
103     };
104   },
105   methods: {
106     // 点击发生的变化
107     handleSelectionChange(val) {
108       this.multipleSelection = val; //给定义的数组赋值
109     },
110     handleDelete(index, row) {
111       this.tableData.splice(index, 1); //删除表格的数据
112     },
113     // 点击弹出添加弹窗
114     addDialog() {
115       this.addIsDialog = true;
116     },
117     // 点击添加弹窗的确定按钮
118     addSureBtn() {
119       this.addIsDialog = false;
120       this.tableData.push(this.formData);
121     },
122     // 点击弹出添加弹窗
123     editDialog(index, row) {
124       this.editIsDialog = true;
125       this.editData = row;
126     },
127     editSureBtn(row, index) {
128       this.editIsDialog = false;
129     }
130   },
131   // 通过computed计算属性及时改变
132   computed: {
133     // 总价
134     totalPrice() {
135       var price_total = 0;
136       for (var i = 0; i < this.multipleSelection.length; i++) {
137         price_total +=
138           this.multipleSelection[i].price * this.multipleSelection[i].number;
139       }
140       return price_total;
141     },
142     // 总数
143     totalNumber() {
144       var number_total = 0;
145       for (var i = 0; i < this.multipleSelection.length; i++) {
146         number_total += this.multipleSelection[i].number;
147       }
148       return number_total;
149     }
150   },
151   components: {}
152 };
153 </script>
154 
155 <style scoped>
156 .cart {
157   margin: 50px auto;
158   width: 1000px;
159 }
160 .group_btn {
161   margin-bottom: 30px;
162 }
163 .addDialog .el-input {
164   width: 90%;
165 }
166 .total_warpper {
167   text-align: right;
168   margin-top: 30px;
169 }
170 h3 {
171   margin-top: 10px;
172 }
173 </style>

 

 

 

 

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