element的dialog组件隐藏默认是不销毁的，所以不会触发生命周期

即便destroy-on-close设置为true也不好用

 

 

 解决办法其实很简单，给他加一个v-if父级

 

 

    <div v-if="outFormFlag">       <el-dialog         title="收款信息"         :visible.sync="outFormFlag"         width="500px"         append-to-body       >         <el-form ref="outForm" :model="outForm" label-width="100px">           <el-form-item label="入库单编号" :required="true" prop="businessCode">             <el-input               v-model="outForm.businessCode"               disabled               placeholder="请输入入库单编号"             />             <span slot="error" class="el-form-item__error"               >入库单编号不能为空</span             >           </el-form-item>
          <el-form-item label="合同编号" :required="true" prop="contractCode">             <el-input               v-model="outForm.contractCode"               disabled               placeholder="请输入合同编号"             />             <span slot="error" class="el-form-item__error"               >合同编号不能为空</span             >           </el-form-item>
          <el-form-item label="仓库编号" :required="true" prop="warehouseCode">             <el-input               v-model="outForm.warehouseCode"               disabled               placeholder="请输入仓库编号"             />             <span slot="error" class="el-form-item__error"               >仓库编号不能为空</span             >           </el-form-item>           <el-form-item label="商品编号" :required="true" prop="skuCode">             <el-input               v-model="outForm.skuCode"               disabled               placeholder="请输入商品编号"             />             <span slot="error" class="el-form-item__error"               >商品编号不能为空</span             >           </el-form-item>           <el-form-item label="数量" :required="true" prop="num">             <el-input v-model="outForm.num" disabled placeholder="请输入数量" />             <span slot="error" class="el-form-item__error">数量不能为空</span>           </el-form-item>           <el-form-item label="收款账号" :required="true" prop="accountCode">             <req-select               placeholder="请选择收款账户"               url="/trade/bank/list"               arr="rows"               label="contacts"               val="accountCode"               :parentData.sync="outForm.accountCode"             />             <span slot="error" class="el-form-item__error"               >收款账号不能为空</span             >           </el-form-item>           <el-form-item label="金额" :required="true" prop="amount">             <el-input               type="number"               v-model="outForm.amount"               placeholder="请输入收款金额"             />             <span slot="error" class="el-form-item__error"               >合同编号不能为空</span             >           </el-form-item>           <el-form-item label="备注" :required="false" prop="remark">             <el-input v-model="outForm.remark" placeholder="请输入备注" />           </el-form-item>         </el-form>         <div slot="footer" class="dialog-footer">           <el-button type="primary" @click="submitOut">确 定</el-button>           <el-button @click="cancelOut">取 消</el-button>         </div>       </el-dialog>     </div>