方法一: 利用Keep-Alive和监听器
1.首先在路由中引入需要的模块
{
path: ‘/scrollDemo’,
name: ‘scrollDemo’,
meta: {
keepAlive: true // 需要缓存
},
component: resolve => {
require([‘../view/scrollDemo.vue’], resolve) }
}
2.在App.vue中设置缓存组件
<keep-alive> // 缓存组件跳转的页面
<router-view v-if="$route.meta.keepAlive" class="ui-view" transition-mode="out-in">router-view>
keep-alive>
// 非缓存组件跳转页面
<router-view v-if="!$route.meta.keepAlive" class="ui-view" transition-mode="out-in">router-view>
3.在页面注册对应的事件
(1). 在data中定义一个初始值 scroll
(2). 在mouted中 ,mouted中的方法代表dom已经加载完毕
window.addEventListener('scroll', this.handleScroll);
(3).methods 用于存放页面函数
handleScroll () {
//document.documentElement.scrollTop获取当前页面的滚动条纵坐标位置
this.scroll = document.documentElement && document.documentElement.scrollTop
console.log(this.scroll)
}
4.activated 为keep-alive加载时调用
activated() {
if(this.scroll > 0){
window.scrollTo(0, this.scroll);//可把内容滚动到指定的坐标
this.scroll = 0;
window.addEventListener('scroll', this.handleScroll);
}
}
5.deactivated 页面退出时关闭事件 防止其他页面出现问题
deactivated(){
window.removeEventListener('scroll', this.handleScroll);
}
方法二:利用beforeRouteLeave和watch
main.js中:
var store = new Vuex.Store({
//记得先引入vuex
state: {
recruitScrollY: 0
},
getters: {
recruitScrollY: state => state.recruitScrollY
},
mutations: {
changeRecruitScrollY(state, recruitScrollY) {
state.recruitScrollY = recruitScrollY;
}
},
actions: {
},
modules: {
}
})
组件中(/flashSaleListX为当前组件,即需要记住滚动条位置的组件):
methods:{
isTabRoute: function() {
if (this.$route.path === '/flashSaleListX') {
let recruitScrollY = this.$store.state.recruitScrollY
document.documentElement.scrollTop = recruitScrollY;
}
}
},
watch: {
'$route': 'isTabRoute',
},
beforeRouteLeave(to, from, next) {
let position = document.documentElement && document.documentElement.scrollTop; //记录离开页面时的位置
if (position == null) position = 0
this.$store.commit('changeRecruitScrollY', position) //离开路由时把位置存起来
next()
}
方法三:(适用于方法二获取不到滚动位置)
组件中:
<template>
<div ref="div1">
··· 内容···
</div>
</template>
beforeRouteEnter(to, from, next) {
next(vm => {
const div1 = vm.$refs.div1
// 记录滚动高度
div1.scrollTop = vm.scroll
})
},
beforeRouteLeave(to, from, next) {
const div1 = this.$refs.div1;
this.scroll = div1.scrollTop; //data中记得定义变量scroll
next()
}
注:在路由配置中,记住滚动的页面keep-alive需为true