vue 路由跳转记住滚动位置,返回时回到上次滚动位置

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

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