一個外賣軟件，用了element-ui,訂單用el-table顯示，表格每一列分別表示商品的名稱，數(shù)量，總價，現(xiàn)在想要實現(xiàn)：用el-input-number動態(tài)修改數(shù)量時，商品的總價也會隨著改變。本來打算用watch監(jiān)聽表格綁定的數(shù)據(jù)，但是百度了一下說vue無法監(jiān)聽數(shù)組的變化？于是我就有點不知所措了，求大神指教代碼    <el-table         :data="basket"         stripe         style="width: 100%"       >         <el-table-column           prop="name"           label="商品"           align="center"         ></el-table-column>         <el-table-column           prop="num"           label="份數(shù)"           align="center"         >           <template  slot-scope="scope" >             <el-input-number v-show="scope.row.num" size="mini" v-model="scope.row.num"></el-input-number>           </template>         </el-table-column>         <el-table-column           prop="price"           label="小計(元)"           align="center"         >