主要思路通过自定义指令，在视图初始化完成后，绑定scroll事件。当scrollTop + clientHeight >= scrollHeight时（此时滚定条到了底部）触发loadMore事件，

<template>

  <div class="index" v-scroll="loadMore">

   <!-- 列表数据传递给子组件，loading表示是否正在加载数据，避免在请求时多次触发 -->

    <my-item :lists="lists" :loading="loading" />

  </div>

</template>

<script>

import MyItem from '~/components/Item.vue'

export default {

  name: 'Index',

  created () {

  // 初始化数据

    this.$store.dispatch('GET_INDEX_LISTS')

    this.lists = this.$store.state.lists

  },

  data() {

    return {

      lists: [],

      page: 1,

      loading: false

    }

  },

  directives: {

  scroll: {

    bind: function (el, binding){

      window.addEventListener('scroll', function() {

        if(document.documentElement.scrollTop + document.documentElement.clientHeight  >= document.documentElement.scrollHeight) {

          let loadData = binding.value

          loadData()

        }

      })

    }

  }

},

methods: {

  async loadMore(){

    if(!this.loading){

      this.loading = true

        // 请求下一页数据

      await this.$store.dispatch('GET_INDEX_LISTS', {

          page: this.page++

        })

    // 重新填充数据

    this.lists = this.lists.concat(this.$store.state.lists)

    this.loading = false

    }

  }

},

  components: {

    MyItem

  }

}

</script>

附上一个css loading动画 , Loading.vue:

<template>

<div class="loading">

  <div class="loader-inner line-scale">

    <div></div>

    <div></div>

    <div></div>

    <div></div>

    <div></div>

  </div>

</div>

</template>

<style>

.loading {

  text-align: center;

}

.loader-inner {

  display: inline-block;

}

@-webkit-keyframes line-scale {

  0% {

    -webkit-transform: scaley(1);

    transform: scaley(1);

  }

  50% {

    -webkit-transform: scaley(0.4);

    transform: scaley(0.4);

  }

  100% {

    -webkit-transform: scaley(1);

    transform: scaley(1);

  }

}

@keyframes line-scale {

  0% {

    -webkit-transform: scaley(1);

    transform: scaley(1);

  }

  50% {

    -webkit-transform: scaley(0.4);

    transform: scaley(0.4);

  }

  100% {

    -webkit-transform: scaley(1);

    transform: scaley(1);

  }

}

.line-scale > div:nth-child(1) {

  -webkit-animation: line-scale 1s 0.1s infinite

    cubic-bezier(0.2, 0.68, 0.18, 1.08);

  animation: line-scale 1s 0.1s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08);

}

.line-scale > div:nth-child(2) {

  -webkit-animation: line-scale 1s 0.2s infinite

    cubic-bezier(0.2, 0.68, 0.18, 1.08);

  animation: line-scale 1s 0.2s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08);

}

.line-scale > div:nth-child(3) {

![](http://images2017.cnblogs.com/blog/1027889/201712/1027889-20171206110307066-486062764.png)

  -webkit-animation: line-scale 1s 0.3s infinite

    cubic-bezier(0.2, 0.68, 0.18, 1.08);

  animation: line-scale 1s 0.3s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08);

}

.line-scale > div:nth-child(4) {

  -webkit-animation: line-scale 1s 0.4s infinite

    cubic-bezier(0.2, 0.68, 0.18, 1.08);

  animation: line-scale 1s 0.4s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08);

}

.line-scale > div:nth-child(5) {

  -webkit-animation: line-scale 1s 0.5s infinite

    cubic-bezier(0.2, 0.68, 0.18, 1.08);

  animation: line-scale 1s 0.5s infinite cubic-bezier(0.2, 0.68, 0.18, 1.08);

}

.line-scale > div {

  background-color: #fe0061;

  width: 4px;

  height: 30px;

  border-radius: 2px;

  margin: 2px;

  -webkit-animation-fill-mode: both;

  animation-fill-mode: both;

  display: inline-block;

}

</style>

加载效果图：