1.vuex2.@click.native 给组件点击事件3.vuex的工作流4.数据持久化5.子路由-嵌套路由6.路由重定向7.vw的使用8.渐隐渐显的导航
一、vuex
1-1 获取vuex-state的数据
this.$store.state
1-2 this.$store.dispatch向vuex派发一个事件 —actions
methods:{
handleClick(city){
/* this.$store.dispatch 向vuex派发一个事件,同时传递一个参数 */
this.$store.dispatch("changeCity",city)
}
}
二、给组件@click事件
@click.native //给组件事件必须加上native修饰符
三、vuex的工作
1.通过this.$store.dispatch()向vuex中的actions派发一个事件同时传递一个参数
methods:{
handleClick(city){
/* this.$store.dispatch 向vuex派发一个事件,同时传递一个参数 */
this.$store.dispatch("changeCity",city)
}
}
2.vuex-actions中接收dispatch派发过来的事件和参数
export default new Vuex.Store({
...
actions: {
changeCity(ctx,city){
/* ctx表示上下文 this.$store
city是自定义事件传递过来的参数 */
3.在actions中使用commit方法向mutations提交一个事件,同时传递一个参数
ctx.commit("toggleCity",city)
}
}
})
4.在mutations中接收commit方法提交过来的事件,同时改变state中的状态
export default new Vuex.Store({
state: {
city:"武汉"
},
mutations: {
toggleCity(state,city){
state.city = city;
}
}
})
四、数据持久化
function getCity(){
let defaultCity = "天门";
if(localStorage.getItem("city")){
defaultCity = localStorage.getItem("city")
}
return defaultCity;
}
export default new Vuex.Store({
state: {
city:getCity()
},
mutations: {
changeCity(state,city){
state.city = city;
}
},
actions: {
changeCity(ctx,city){
ctx.commit("changeCity",city)
//1.设置缓存
localStorage.setItem("city",city)
}
}
})
五、当地所在城市的接口
http://39.97.33.178/api/getLocation
六、子路由-嵌套路由
6-1 配置子路由
//Tips:在主路由的chilren属性中去配置
const routes = [
{
path: '/films',
name: 'films',
component:()=>import('../views/Films.vue'),
children:[
{
path:'nowPlaying',
component:()=>import('../views/NowPlaying.vue')
},{
path:'comingSoon',
component:()=>import('../views/ComingSoon.vue')
}
]
}
]
6-2 在主路由对应的组件中去设置router-view
目的:router-view去装载这些子路由。router-view本质上就是一个动态组件。
//在Films.vue组件中去配置
<router-view></router-view>
七、路由重定向
const router = new VueRouter({
routes: [
{ path: '/a', redirect: '/b' }
]
})
八、vw的使用
8-1 配置postcss.config.js
module.exports = {
plugins: {
"postcss-import": {},
"postcss-url": {},
"postcss-aspect-ratio-mini": {},
"postcss-write-svg": {
utf8: false
},
"postcss-cssnext": {},
"postcss-px-to-viewport": {
viewportWidth: 750, // 视窗的宽度,对应的是我们设计稿的宽度,一般是750
viewportHeight: 1334, // 视窗的高度,根据750设备的宽度来指定,一般指定1334,也可以不配置
unitPrecision: 3, // 指定`px`转换为视窗单位值的小数位数(很多时候无法整除)
viewportUnit: 'vw', // 指定需要转换成的视窗单位,建议使用vw
selectorBlackList: ['.ignore', '.hairlines'], // 指定不转换为视窗单位的类,可以自定义,可以无限添加,建议定义一至两个通用的类名
minPixelValue: 1, // 小于或等于`1px`不转换为视窗单位,你也可以设置为你想要的值
mediaQuery: false // 允许在媒体查询中转换`px`
},
"postcss-viewport-units": {},
"cssnano": {
preset: "advanced",
autoprefixer: false,
"postcss-zindex": false
}
}
}
8-2 安装依赖
yarn add cssnano postcss-aspect-ratio-mini postcss-cssnext postcss-px-to-viewport postcss-viewport-units postcss-write-svg
yarn add cssnano-preset-advanced postcss-import postcss-url autoprefixer
8-3 在public/index.html配置
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<link rel="icon" href="<%= BASE_URL %>favicon.ico">
<title>vuecli3vw</title>
</head>
<body>
<noscript>
<strong>We're sorry but vuecli3vw doesn't work properly without JavaScript enabled. Please enable it to continue.</strong>
</noscript>
<div id="app"></div>
<!-- built files will be auto injected -->
//配置下面的js
<script src="//g.alicdn.com/fdilab/lib3rd/viewport-units-buggyfill/0.6.2/??viewport-units-buggyfill.hacks.min.js,viewport-units-buggyfill.min.js"></script>
<script>
window.onload = function () {
window.viewportUnitsBuggyfill.init({
hacks: window.viewportUnitsBuggyfillHacks
});
}
</script>
</body>
</html>
九、渐隐渐显的导航
1.style样式的动态绑定
2.生命周期
3.事件监听
<template>
<div class="about">
<h1 class="nav" :style="{opacity:opacity}">This is an about page</h1>
</div>
</template>
<script>
export default {
data(){
return {
opacity:0
}
},
mounted(){
window.addEventListener("scroll",this.handle)
},
methods:{
handle(){
var height = document.documentElement.scrollTop;
/* 到达300完全显示 */
var opacity = height/300;
if(opacity>1){
opacity = 1;
}
console.log(opacity)
this.opacity = opacity;
}
},
destroyed(){
window.removeEventListener("scroll",this.handle)
}
}
</script>
<style scoped>
.nav{
position: fixed;
top:0;
left:0;
width:100%;
height: 40px;
background: red;
z-index: -1;
}
</style>
作业
//实现 卖座网
https://m.maizuo.com/v5/
