原理解析:每滚动一次相当于翻页,请求后端时给的页码参数要想办法加1,后端才能根据页码给出相应数据
注意后端收到页码参数之后要准确计算出每页的首行数据,关键逻辑代码:
# 根据前端传的页码,进行计算下一页的起始行号 page = (int(params['page'])-1)*10+1 sql = f"SELECT * FROM dong_c_di_comment limit 10 offset {page}" print(sql)
前端实现部分:
const [loading, setLoading] = useState(false); const [data, setData] = useState([]); // 定义传给后端的页码钩子 const [page, setPage] = useState(1);const loadMoreData = async () => {if (loading) {return;}setLoading(true);const params = {page:page}get_cars(params).then(res => {setData([...data, ...res.data]);setPage(page + 1);setLoading(false);}).catch(() => {setLoading(false);}); };useEffect(() => {loadMoreData(); }, []);
return(<divid="scrollableDiv"style={{width:"350px",height: "900px",overflow: 'auto',padding: '0 16px',border: '1px solid rgba(140, 140, 140, 0.35)',}}><InfiniteScrolldataLength={data.length}next={loadMoreData}hasMore={data.length < 50}loader={<Skeleton avatar paragraph={{ rows: 1 }} active />}endMessage={<Divider plain>加载完毕, 没有更多数据了哦 🤐</Divider>}scrollableTarget="scrollableDiv"><ListdataSource={data}renderItem={(item) => {// console.log("item1111111",item)return (<List.Item key={item.commenter_name}><List.Item.Metaavatar={<Avatar src={item.avatar_url} />}title={<a href="https://ant.design">{item.title}</a>}description={item.content}/></List.Item>)}}/></InfiniteScroll></div> )