使用Vant如何实现数据分页,下拉加载

Vant-ui的van-list实现数据分页加载

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>vant数据分页,下拉加载</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/vant@2.11/lib/index.css" rel="external nofollow"  />
</head>
<style>
</style>
<body>
  <div id='app'>
    <van-list class="lazy" v-model="loading" :finished="finished" finished-text="没有更多了" @load="onLoad"
      :immediate-check="false">
      <div v-for="(item,index) in list" :key="index">{{item}}</div>
    </van-list>
  </div>
</body>
<script src="https://cdn.staticfile.org/jquery/2.1.4/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vant@2.11/lib/vant.min.js"></script>
<script>
  var Vue = new Vue({
    el: '#app',
    data: {
      list: [],
      page: 1,
      loading: false,
      finished: false,
      num: 0
    },
    created() {
      this.getList()
    },
    mounted() {
    },
    methods: {
      // 请求公共方法
      ajax(url, params, cb) {
        $.ajax({
          type: 'post',
          url: url,
          data: params,
          dataType: "json",
          success: function (response) {
            cb(response)
          }
        });
      },
      onLoad() {
        this.getList()
      },
      getList() {
        let that = this
        that.ajax('url', { kay: 'value' }, function (res) {
          if (res.errcode != 0) {
            that.$toast(res.msg)
            return false
          }
          if (that.page == 1) {
            that.list = res.data.list
          } else {
            that.list = that.list.concat(res.data.list)
          }
          that.loading = false;
          that.page++
          //最后一次请求返回的数据为空或小于10条,不在请求,finished = true
          //根据业务需求更改
          if (res.data.list.length == 0 || res.data.list == null || res.data.list.length < 10) {
            that.finished = true
            return
          }
        })
      }
    }
  })
</script>
</html>

主要三个属性

注意:

  • v-model 每次数据加载完成要置为false
  • finished 置为false后将不再触发下拉加载
  • immediate-check 置为false后,每次进入页面将不会触发load方法,防止进入页面多次加载

vant上拉加载更多,下拉刷新

1.html

   <van-pull-refresh v-model="isLoading" @refresh="onRefresh">
            <van-list
              v-model="loading"
              :finished="finished"
              :immediate-check="false"
              finished-text="没有更多了呦"
              @load="onLoad"
            > 
         
            </van-list>
          </van-pull-refresh>

2.js

 return {    
      isLoading: false,
      loading: false,   
    
      page: 1,
      limit: 10,
      finished: false,
      total: 0, // 总共的数据条数
      List: [], 
    }
 
   getHistory() {
      const historyData = {
        page: this.page,
        limit: this.limit
      }
      return new Promise((resolve, reject) => {
        getHistory(historyData)
          .then(res => {
            if (res.code === 0) {
              console.log(res, '历史记录')
              this.total = res.data.total
              this.finished = !res.data.hasNext
              if (res.data.list && res.data.list.length > 0) {
                const tempList = res.data.list
                // console.log(this.page)
                if (this.page > 1) {
                  this.list = this.list.concat(tempList)
                } else {
                  this.list = tempList // 第一次加载
                }
                this.page += 1
              } else {
                this.list = []
              }
              this.loading = false
              resolve()
            }
          })
          .catch(error => {
            reject(error)
          })
      })
    }, 
 
  onLoad() {
      this.getHistory()
    },
    onRefresh() {
      this.page = 1
      setTimeout(() => {
        this.getHistory()
        Toast('刷新成功')
        this.isLoading = false
      }, 1000)
    },

以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。 

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