el-input 视图不刷新或者视图刷寻之后值没有更新

背景：

el-table表格循环的数据，本次发货数量不能大于剩余数量，如果大于剩余数量就默认变为剩余数量

HTML代码：

　　　　　　<el-table-column prop="skuDeliveryNum" align="center" label="本次发货数量" min-width="110">

                            <template slot-scope="scope">

                                <el-input maxlength="50" v-model="scope.row.skuDeliveryNum" placeholder="请输入" :max="scope.row.skuLeftNum"

                                    @blur="changeNun(scope.row)"

                                    @input="scope.row.skuDeliveryNum = scope.row.skuDeliveryNum.replace(/[^0-9]/g, '');">  

                                </el-input>

                            </template>

                        </el-table-column>

@input="scope.row.skuDeliveryNum = scope.row.skuDeliveryNum.replace(/[^0-9]/g, '');">   不允许输入数字以外的字符

//发货数量判断

            changeNun(num) {

                if (event.target.value > num.skuLeftNum) {

                    this.$nextTick(()=>{

                        num.skuDeliveryNum = num.skuLeftNum

                    })

                    this.$message.error('发货数量不能大于剩余数量');

                } else if (event.target.value == '' || event.target.value == null) {

                    this.$nextTick(()=>{

                        num.skuDeliveryNum = 1

                    })

                }

            },

 

  this.$nextTick(()=>{  })      //用这个方法去刷新视图和数据