在umi项目的src中创建layouts,src/layouts/index.js
中编写一个react组件。
组件默认接收一个props属性为children
,children
将会默认渲染src/page/index.js
下也就是umi的默认进入页,路由切换时等于是切换children
部分。
剩下的部分可以全局渲染,因此可以把标签渲染在底部全局,children
放在上方,就达到了点击下方标签,切换路由的效果。
我示例使用的是antd-mobile v5.0.0-rc.3
和react-transition-group
,在umi项目中需要额外安装。
yarn add react-transition-group
yarn add antd-mobile@v5.0.0-rc.3
src/layouts/index.js
代码
- 我想要的效果是标签页的切换都是用replace实现,当检测
history.action === 'REPLACE'
时,则根据标签页的前后顺序决定向左还是向右切换动画。- 当
history.action === 'PUSH'或者'POP'
时,后续将会PUSH
进入二级页面,就是前进,点击浏览器后退就是POP
后退
import styles from './index.less';
import { TabBar } from 'antd-mobile/2x';
import router from 'umi/router';
import { TransitionGroup, CSSTransition } from 'react-transition-group';
import withRouter from 'umi/withRouter';
import React, { useState } from 'react';
import home1 from '@/assets/home1.png';
import home2 from '@/assets/home2.png';
import update1 from '@/assets/update1.png';
import update2 from '@/assets/update2.png';
import collect1 from '@/assets/collect1.png';
import collect2 from '@/assets/collect2.png';
import my1 from '@/assets/my1.png';
import my2 from '@/assets/my2.png';
export default withRouter(({ location, children, history }) => {
// 根据前进还是后退显示不同的转场动画效果
const ANIMATION_MAP = {
PUSH: 'forward',
POP: 'back',
};
// 路由跳转时执行
const checkrouter = () => {
const { state = {} } = location;
//beforepath 跳转前路由,只有在四个标签页跳转时有传递
const { beforepath } = state;
//curpath 当前路由
const curpath = history.location.pathname;
// 标签页路由集合
const indexRouter = ['/', '/update', '/collect', '/my'];
// 判断是不是标签页跳转
const flag = history.action === 'REPLACE';
// 判断标签页跳转前后顺序
const before = indexRouter.findIndex(cur => cur === beforepath);
const after = indexRouter.findIndex(cur => cur === curpath);
const change = before < after ? 'PUSH' : 'POP';
// 如果当前路由不是标签,说明跳去了二级页面,应该隐藏标签
sethide(after === -1);
// 设置转场动画效果
return ANIMATION_MAP[flag ? change : history.action];
};
// 判断标签页是否隐藏
const [hide, sethide] = useState(false);
const tabs = [
{
key: '/',
title: '首页',
icon: <img src={home1} className={styles.iconImg} alt="首页" />,
selectedIcon: <img src={home2} className={styles.iconImg} alt="首页" />,
},
{
key: '/update',
title: '更新',
icon: <img src={update1} className={styles.iconImg} alt="更新" />,
selectedIcon: <img src={update2} className={styles.iconImg} alt="更新" />,
},
{
key: '/collect',
title: '收藏',
icon: <img src={collect1} className={styles.iconImg} alt="收藏" />,
selectedIcon: <img src={collect2} className={styles.iconImg} alt="收藏" />,
},
{
key: '/my',
title: '我的',
icon: <img src={my1} className={styles.iconImg} alt="我的" />,
selectedIcon: <img src={my2} className={styles.iconImg} alt="我的" />,
},
];
return (
<div
style={{ display: 'flex', flexDirection: 'column', height: '100%', paddingBottom: '5rem' }}
>
<div style={{ flex: 1, display: 'flex', overflow: 'auto' }}>
<TransitionGroup
childFactory={child => React.cloneElement(child, { classNames: checkrouter() })}
>
<CSSTransition
key={location.pathname}
timeout={300}
style={{
position: 'fixed',
height: '100%',
width: '100%',
top: '0',
overflow: 'auto',
// 隐藏标签时要把下方padding重置为0
paddingBottom: hide ? '0rem' : '5rem',
}}
>
<div>{children}</div>
</CSSTransition>
</TransitionGroup>
</div>
<div className={styles.normal} style={{ visibility: hide ? 'hidden' : 'unset' }}>
<TabBar
activeKey={location.pathname}
onChange={beforepath =>
// 标签跳转,使用replace,同时传递跳转前路由
router.replace(beforepath, { beforepath: history.location.pathname })
}
>
{tabs.map(item => (
<TabBar.Item
key={item.key}
// 切换选中未选中图片
icon={location.pathname === item.key ? item.selectedIcon : item.icon}
title={item.title}
/>
))}
</TabBar>
</div>
</div>
);
});
样式代码
src/global.less
- 我是用rem加vw的方式做全局适配。因此你会看到我使用长度一般是
rem/20
这种奇怪的单位,1rem等于html的font-size100/750vw*20
,则750rem/20
就是100vw,就是一整个屏幕宽度,一般的ui设计图是750px,也就是只要把设计图上的数字使用rem/20单位就可以进行任何设备的适配了。
html,
body,
#root {
height: 100%;
font-family: '楷体';
}
html {
font-size: 100/750vw*20;
}
body {
margin: 0;
}
src/loyouts/index.less
- 前进和后退的动作在前半部分,后面是antd页标签的适配调整,可以适配大屏小屏任何设备。
:global {
.forward-enter {
opacity: 0;
transform: translateX(100%);
}
.forward-enter-active {
opacity: 1;
transform: translateX(0);
transition: all 300ms ease-in;
}
.forward-exit {
opacity: 1;
transform: translateX(0);
}
.forward-exit-active {
opacity: 0;
transform: translateX(-100%);
transition: all 300ms ease-in;
}
.back-enter {
opacity: 0;
transform: translateX(-100%);
}
.back-enter-active {
opacity: 1;
transform: translateX(0);
transition: all 300ms ease-in;
}
.back-exit {
opacity: 1;
transform: translateX(0);
}
.back-exit-active {
opacity: 0;
transform: translate(100%);
transition: all 300ms ease-in;
}
}
.normal {
position: fixed;
bottom: 0;
width: 100%;
height: 100rem/20;
background-color: white;
// border-top: 1rem/20 solid lightgray;
box-shadow: 0 -1px 10px 1px rgba(0, 0, 0, 0.1);
:global {
.adm-tab-bar-item {
height: 100rem/20;
.adm-tab-bar-item-icon {
height: 40rem/20;
width: 40rem/20;
margin: 0;
font-size: initial;
}
.adm-tab-bar-item-title {
font-size: 24rem/20;
line-height: unset;
}
}
.adm-tab-bar-item-active {
color: #B9E2F6;
}
}
}
.iconImg {
width: 40rem/20;
height: $width;
}