DT走过的路

封装loading组件src\components\Loading\index.jsx

需安装classnames组件

loading层需要支持全屏或者部分屏定位

import React from 'react';
import './index.less';
import classnames from 'classnames';
const Loading = ({isLoading, part=false}) => {
    const loadingStyle = part ? {
        position: 'absolute',
        top: '50%',
        left: '50%',
        height: '100px',
        width: '100px',
        transform: 'translate(-50%, -50%)',
    } : {};
    return (
        <div style={loadingStyle} className={classnames('loader', 'fullScreen', {hidden: !isLoading})}>
            <div className='wrapper'>
                <div className='inner'></div>
                <div className='text'>LOADING</div>
            </div>
        </div>
    );
};

export default Loading;

src\components\Loading\index.less

基本样式

.loader {
  background-color: #fff;
  width: 100%;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 1;
  text-align: center;

  &.fullScreen {
    position: fixed;
  }

  .wrapper {
    width: 100px;
    height: 100px;
    display: inline-flex;
    flex-direction: column;
    justify-content: space-around;
  }

  .inner {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    text-indent: -12345px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    border-right: 1px solid rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    border-left: 1px solid rgba(0, 0, 0, 0.7);
    border-radius: 50%;
    z-index: 100001;
    animation: spinner 600ms infinite linear;
  }

  .text {
    width: 100px;
    height: 20px;
    text-align: center;
    font-size: 12px;
    letter-spacing: 4px;
    color: #000;
  }

  &.hidden {
    z-index: -1;
    opacity: 0;
    transition: opacity 1s ease 0.5s, z-index 0.1s ease 1.5s;
  }
}
@keyframes spinner {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

主要通过useSelector实现，dva里effects定义的都会产生loading状态

const loading = useSelector(state => state.loading);
  //console.log(loading,'loading');

src\layouts\BaseLayout.jsx

import { Outlet, history, useNavigate, useLocation, useSelector } from 'umi';
import { Layout, Menu } from 'antd';
const { Header, Footer, Sider, Content } = Layout;
import SildeBar from 'components/SildeBar';
import { useState, useEffect } from 'react';
import './BaseLayout.less';
import CommonHeader from 'components/CommonHeader';
import NotFoundPage from '../pages/404Page';
import Loading from 'components/Loading';

export default function BackLayout({children}) {
  const [collapse, setCollapse] = useState(false);
  const changeCollapse = () => {setCollapse(!collapse);}
  const navigate = useNavigate();
  const location  = useLocation();
  const pathname = location.pathname;
  const routeList = sessionStorage.getItem('routeList') ? JSON.parse(sessionStorage.getItem('routeList')) : [];
  const loading = useSelector(state => state.loading);
  //console.log(loading,'loading');
  // useEffect(() => {
  //   console.log(pathname,'pathname');
  //   if (pathname === '/') {
  //     navigate(routeList[0].route, { replace: true });
  //   }
  // }, [pathname, routeList, navigate]);
  //特殊处理，跳首页及没有跳404
  const pageJudge = () => {
    if (location.pathname === '/') {
      //history.replace(routeList[0]?.route || '/');
      navigate(routeList[0]?.route || '/', { replace: true });
      return true;
    }
    return routeList.some(item => item.route === location.pathname);
  }

  return (
      <Layout className="container">
        <SildeBar Sider={Sider} Menu={Menu} collapse={collapse} />
        <Layout>
          <CommonHeader 
            Header={Header} 
            collapse={collapse}
            changeCollapse={changeCollapse}
          />
          <Content className="main-content">{pageJudge() ? (
            <>
            <Loading  part={true} isLoading={loading?.effects['dashboard/initDashboardList']} />
            <Outlet />
            </>): (<NotFoundPage />)}</Content>
        </Layout>
      </Layout>
  );
}