fixedStep() {
    this.$nextTick(() => {
        this.tableData.map(item => {
            this.batchCompu.forEach(v => {
                item[`batch${v}`] = (Number(item.num) + (v - 1) * Number(item.step)).toFixed(this.digits)
            })
            return {
                ...item
            }
        })
        this.$refs.tableRef?.updateData() // vxe 手动处理数据 
    })
},