四舍五入

pages/submit-quotation/index.vue

@@ -148,7 +148,7 @@
             <view class=""><view class="submit-popup-title">购买数量(张)</view></view>
             <view class="submit-number-line">
               <uni-number-box v-model="addObj.quantity"></uni-number-box>
-              <text class="submit-number-text">预估重量：{{ Math.round(addObj.gramWeight * addObj.width * addObj.length * addObj.quantity * 1e-12, 4) }}</text>
+              <text class="submit-number-text">预估重量：{{ round(addObj.gramWeight * addObj.width * addObj.length * addObj.quantity * 1e-12, 4) }}</text>
             </view>
           </view>
           <view class=""><button class="submit-btn submit-number-btn" type="primary" @click="sureModifyPaper()">确认修改纸品</button></view>
@@ -220,6 +220,7 @@ import { back, go2 } from '@/utils/hook.js'
 import qnHeader from '@/components/qn-header/qn-header.vue'
 import uGap from '@/components/u-gap/u-gap.vue'
 import { updateEnquiryReply, enquiryReplyDetail } from '@/apis/trade'
+import { round } from '@/utils/index.js'
 
 export default {
   components: {
@@ -274,6 +275,7 @@ export default {
   },
   methods: {
     back,
+    round,
     // 获取详情
     getDetail(id) {
       enquiryReplyDetail(id)
@@ -289,7 +291,7 @@ export default {
             // 计算每个纸品的重量
             for (let i = 0; i < this.upDataObj.itemList.length; i++) {
               let target = this.upDataObj.itemList[i]
-              target.weight = Math.round(target.gramWeight * target.width * target.length * target.quantity * 1e-12, 4)
+              target.weight = round(target.gramWeight * target.width * target.length * target.quantity * 1e-12, 4)
             }
           }
         })
@@ -396,7 +398,7 @@ export default {
     sureModifyPaper() {
       this.$refs.popup.close()
       // 同时更改重量
-      this.addObj.weight = Math.round(this.addObj.gramWeight * this.addObj.width * this.addObj.length * this.addObj.quantity * 1e-12, 4)
+      this.addObj.weight = round(this.addObj.gramWeight * this.addObj.width * this.addObj.length * this.addObj.quantity * 1e-12, 4)
       this.upDataObj.itemList[this.modifyIndex] = JSON.parse(JSON.stringify(this.addObj))
       this.upDataObj = JSON.parse(JSON.stringify(this.upDataObj))
 
@@ -411,8 +413,8 @@ export default {
     pricesSure() {
       this.$set(this.upDataObj.itemList[this.pricesIndex], 'otherFee', this.prices.otherFee)
       this.$set(this.upDataObj.itemList[this.pricesIndex], 'unitFee', this.prices.unitFee)
-      var abs = Math.round(this.prices.unitFee * this.prices.weight + (this.prices.otherFee - 0), 2)
-      this.$set(this.upDataObj.itemList[this.pricesIndex], 'totalPrice', Math.round(abs, 2))
+      var abs = round(this.prices.unitFee * this.prices.weight + (this.prices.otherFee - 0), 2)
+      this.$set(this.upDataObj.itemList[this.pricesIndex], 'totalPrice', round(abs, 2))
       this.upDataObj = JSON.parse(JSON.stringify(this.upDataObj))
       this.$refs.popupPrice.close()
       console.log(this.upDataObj.itemList)
@@ -423,9 +425,9 @@ export default {
       this.upDataObj.otherFee = 0
       for (let i = 0; i < this.upDataObj.itemList.length; i++) {
         var totalAllPrice = parseFloat(this.upDataObj.totalAllPrice) + parseFloat(this.upDataObj.itemList[i].totalPrice)
-        this.upDataObj.totalAllPrice = Math.round(totalAllPrice, 2)
+        this.upDataObj.totalAllPrice = round(totalAllPrice, 2)
         var otherFee = parseFloat(this.upDataObj.otherFee) + parseFloat(this.upDataObj.itemList[i].otherFee)
-        this.upDataObj.otherFee = Math.round(otherFee, 2)
+        this.upDataObj.otherFee = round(otherFee, 2)
       }
     },
     //提交报价

utils/hook.js

@@ -20,7 +20,7 @@ export function tab2(tabPage) {
  * @return {null}
  */
 export function back() {
-  if (getCurrentPages().length > 0) {
+  if (getCurrentPages().length > 1) {
     uni.navigateBack({
       delta: 1
     })

utils/index.js

@@ -151,3 +151,12 @@ export const makeSocket = async ({ pageInfo = '', retry = false }) => {
 
   return socket
 }
+
+/**
+ * 正数的四舍五入
+ * @value {number} num 需要四舍五入的数字
+ * @value {number} precision 小数点后保留的位数
+ */
+export function round(number, precision) {
+  return Math.round(+number + 'e' + precision) / Math.pow(10, precision)
+}