🎈 perf(购物页面): 改善滚动列表的加载

src/common/util.ts

@@ -61,16 +61,16 @@ export const getFilterData = (val = {}, arr: string[] = []) => {
  * @param {*} object
  * @returns
  */
-export const copyObject = (object) => {
+export const copyObject = object => {
   if (object.constructor == Object) {
     let keys = Object.keys(object)
     let newObject = {}
-    keys.map((key) => {
+    keys.map(key => {
       newObject[key] = copyObject(object[key])
     })
     return newObject
   } else if (object.constructor == Array) {
-    return object.map((item) => {
+    return object.map(item => {
       return copyObject(item)
     })
   } else {
@@ -93,9 +93,17 @@ export const copyObject = (object) => {
 export const screenshot = (url, suffix = '!w200') => {
   return url + suffix
 }
-
+interface DataLoadingStatus {
+  list: any[]
+  total: number
+  status: boolean
+}
 //获取数据加载状态 //0:数据从无到有加载数据，1，没有任何数据， 2：下拉加载，3：下拉没有数据
-export const dataLoadingStatus = ({ list = [], total = 0, status = false }: { list: any[]; total: number; status: true | false }) => {
+export const dataLoadingStatus = ({ list = [], total = 0, status = true }: DataLoadingStatus) => {
+  // 类型校验
+  if (Object.prototype.toString.call(list) !== '[object Array]') {
+    list = []
+  }
   if (list.length == 0 && status) {
     return 0
   } else if (list.length == 0 && !status) {
@@ -107,7 +115,6 @@ export const dataLoadingStatus = ({ list = [], total = 0, status = false }: { li
   }
 }
 
-
 function delay(delayTime = 25): Promise<null> {
   return new Promise(resolve => {
     setTimeout(() => {
@@ -117,10 +124,7 @@ function delay(delayTime = 25): Promise<null> {
   })
 }
 
-export function delayQuerySelector(
-  selectorStr: string,
-  delayTime = 500
-): Promise<any[]> {
+export function delayQuerySelector(selectorStr: string, delayTime = 500): Promise<any[]> {
   return new Promise(resolve => {
     const selector: SelectorQuery = Taro.createSelectorQuery()
     delay(delayTime).then(() => {
@@ -134,7 +138,6 @@ export function delayQuerySelector(
   })
 }
 
-
 //全局分享监听
 export const shareShop = () => {
   const page = Taro.getCurrentInstance().page
@@ -143,7 +146,7 @@ export const shareShop = () => {
     analysisShortCodeApi(page.options.share)
   }
   if (page && page.onShareAppMessage) {
-    page.onShareAppMessage = (res) => {
+    page.onShareAppMessage = res => {
       let path = ''
       let title = ''
       let imageUrl = ''
@@ -170,5 +173,3 @@ export const shareShop = () => {
     }
   }
 }
-
-

src/components/infiniteScroll/index.tsx

@@ -1,8 +1,8 @@
-import { ScrollView, View } from "@tarojs/components"
-import React, { memo, ReactNode, useMemo, useState } from "react"
-import style from "./index.module.scss"
-import DotLoading from "@/components/dotLoading"
-import LoadingCard from "../loadingCard"
+import { ScrollView, View } from '@tarojs/components'
+import React, { memo, ReactNode, useMemo, useState } from 'react'
+import style from './index.module.scss'
+import DotLoading from '@/components/dotLoading'
+import LoadingCard from '../loadingCard'
 
 export type StatusParam = 0 | 1 | 2 | 3
 
@@ -76,7 +76,6 @@ export default memo(
       }
     }, [statusMore])
 
-
     const component = () => {
       if (enableLoadMoreStatus) {
         if (!moreStatus) {
@@ -92,12 +91,14 @@ export default memo(
                 <View style={{ paddingBottom: paddingBottom + 'rpx' }} className={style.scrollViewCon}>
                   {children}
                   <View className={style.infinite_scroll}>
-                    {(statusMore == 2 && (
+                    {statusMore == 2 ? (
                       <View className={style.loading_more}>
                         加载中
                         <DotLoading />
                       </View>
-                    )) || <View className={style.noMore}>没有更多数据了</View>}
+                    ) : (
+                      <View className={style.noMore}>没有更多数据了</View>
+                    )}
                   </View>
                 </View>
               )}
@@ -106,7 +107,6 @@ export default memo(
             </>
           )
         }
-          
       } else {
         return (
           <View style={{ paddingBottom: paddingBottom + 'rpx' }} className={style.scrollViewCon}>

src/pages/shopping/index.tsx

@@ -1,7 +1,7 @@
 import Search from '@/components/search'
 import { View } from '@tarojs/components'
 import Taro, { useDidShow } from '@tarojs/taro'
-import { FC, memo, useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
+import { FC, memo, useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState, useTransition } from 'react'
 import styles from './index.module.scss'
 import classnames from 'classnames'
 import IconText from '@/components/iconText'
@@ -15,6 +15,7 @@ import { dataLoadingStatus, debounce, getFilterData } from '@/common/util'
 import { ShoppingProvider } from './components/shoppingCart/index'
 import { Goods, ShoppingDispatchType, useShoppingDispatch, useShoppingState } from './context'
 import { alert, goLink, isEmptyObject } from '@/common/common'
+import LoadingCard from '@/components/loadingCard'
 
 export const Shopping: FC = memo(() => {
   // 计算总的预估金额
@@ -87,7 +88,9 @@ const ShoppingCartContainer: FC<InternalContainer> = () => {
 
   //数据加载状态
   const statusMore = useMemo(() => {
-    return dataLoadingStatus({ list: shoppingCartData.list, total: shoppingCartData.total, status: state.loading })
+    const status = dataLoadingStatus({ list: shoppingCartData.list, total: shoppingCartData.total, status: state.loading })
+    console.log('status==>', status)
+    return status
   }, [shoppingCartData, state])
 
   // useLayoutEffect 执行在DOM更新之后，浏览器绘制之前 如果放在 useEffect 里面会产生多一次不必要的回流和重绘，可能会引起视图闪现
@@ -112,8 +115,12 @@ const ShoppingCartContainer: FC<InternalContainer> = () => {
     })()
   }, [])
 
+  const [isPending, startTransition] = useTransition()
+
   useEffect(() => {
+    startTransition(() => {
       setShoppingCartData({ list: state.data, total: state.data.length })
+    })
   }, [state])
 
   // 结算
@@ -228,10 +235,14 @@ const ShoppingCartContainer: FC<InternalContainer> = () => {
       <View className={classnames('flex-item', 'flex-col', styles['shopping--context'])}>
         <View className={classnames(styles.shopping__list__container, 'flex-item')} style={{ height: listHeightRef.current }}>
           <InfiniteScroll statusMore={statusMore} refresherEnabled={true} selfOnRefresherRefresh={handleRefresh} refresherTriggered={refreshStatus}>
-            {!!shoppingCartData?.list?.length &&
+            {isPending ? (
+              <LoadingCard />
+            ) : (
+              !!shoppingCartData?.list?.length &&
               shoppingCartData?.list?.map((item, index) => {
                 return <ItemList itemData={item} key={index}></ItemList>
-              })}
+              })
+            )}
           </InfiniteScroll>
         </View>
       </View>

src/use/useHttp.ts

@@ -110,7 +110,7 @@ export const useRequest = (
     success: false, // 请求是否成功
     data: {},
     msg: '',
-    loading: false,
+    loading: true,
     error: null,
     query: {},
     filter: null,