vant 中van-list的用法说明
van-list里面的元素不能有float样式,否则会连续触发 load 事件
原代码
<template> <div class="about"> <van-tabs v-model="active" sticky @change="getTypeDate"> <van-tab v-for="(tab) in typeList" :title="tab.name" :key="tab.id"> <div :style="{height: contentHeight}" class="pic-content"> <van-list :finished="finished" :finished-text="finishedText" v-model="loading" :offset="10" :immediate-check="false" @load="getserviceList" > <!------------------------------------------------- 修改前代码 ---------------------------------------------> /*<div class="pic-box" v-for="(serve) in serviceList" :key="serve.id" @click="router(serve)" > <div class="pic-item"> <img v-if="serve.picturePath" :src="$BASE_PICTUREPATH_URL + serve.picturePath.split(',')[0]" > </div> <p>{{serve.name}}</p> <p class="price-red">¥{{serve.price}}</p> </div>*/ <!------------------------------------------------- 修改前代码 ---------------------------------------------> </van-list> </div> </van-tab> </van-tabs> </div> </template>
<script> import { Tab, Tabs, List, Cell, Row, Col } from "vant"; import { FetchServeType, FetchServeList } from "../apis/serve.js"; export default { data() { return { active: 0, typeList: [], serviceList: [], type: "", finishedText: "", finished: false, pageNum: 1, pageSize: 10, contentHeight: 0, loading: false }; }, mounted() { this.getOrderStyle(); this.contentHeight = document.documentElement.clientHeight - 66 - 40 + "px"; }, methods: { async getOrderStyle() { let res = await FetchServeType(); if (res.data && res.data.success) { this.typeList = res.data.data; this.type = res.data.data[0].name; this.getTypeDate(); } }, getTypeDate() { this.pageNum = 1; this.type = this.typeList[this.active].name; this.serviceList = []; this.finishedText = ""; this.finished = false; this.getserviceList(); }, async getserviceList() { let toast = this.$toast.loading({ mask: true, message: "加载中..." }); const { type, pageNum, pageSize } = this; let params = { type, pageNum, pageSize }; let res = await FetchServeList(params); this.loading = false; toast.close(); if (res.data && res.data.success) { let list = (res.data.data && res.data.data.list) || []; if (pageNum > 1) { this.serviceList = [...this.serviceList, ...list]; } else { this.serviceList = list; } // 如果当前页数 = 总页数,则已经没有数据 if (res.data.data.pageNum === res.data.data.pages) { this.finished = true; this.finishedText = "- 没有更多了-"; } // 如果总页数大于当前页码,页码+1 if (res.data.data.pages > pageNum) { this.pageNum++; } } console.log("FetchServeList: ", this.serviceList); } } }; </script>
<style lang="scss" scoped> .pic-content { overflow-y: scroll; -webkit-overflow-scrolling: touch; .pic-box { /****************************修改前代码***************************/ background-color: #fff; overflow: hidden; break-inside: avoid; box-sizing: border-box; margin-bottom: 0.7rem; padding: 0.8rem; width: 48%; height: 16rem; ~~float: left;~~ /**************不能有float样式*************/ margin: 1%; border-radius: 4px; /****************************修改前代码***************************/ p:nth-of-type(1) { padding: 0.8rem 0; } p:nth-of-type(2) { color: red; } .pic-item { height: 11rem; flex-direction: column; justify-content: center; overflow: hidden; img { width: 100%; height: auto; border-radius: 4px; } } } } </style>
// 修改后代码(注释部分为修改后代码)
<template> <div class="about"> <van-tabs v-model="active" sticky @change="getTypeDate"> <van-tab v-for="(tab) in typeList" :title="tab.name" :key="tab.id"> <div :style="{height: contentHeight}" class="pic-content"> <van-list :finished="finished" :finished-text="finishedText" v-model="loading" :offset="10" :immediate-check="false" @load="getserviceList" > <!------------------- 修改后代码 --------------------> /*<van-row> <van-col span="12" class="pic-box" v-for="(serve) in serviceList" :key="serve.id" @click="router(serve)" > <div class="pic-item"> <img v-if="serve.picturePath" :src="$BASE_PICTUREPATH_URL + serve.picturePath.split(',')[0]" > </div> <p>{{serve.name}}</p> <p class="price-red">¥{{serve.price}}</p> </van-col> </van-row>*/ <!------------------- 修改后代码 --------------------> </van-list> </div> </van-tab> </van-tabs> </div> </template>
<script> import { Tab, Tabs, List, Cell, Row, Col } from "vant"; import { FetchServeType, FetchServeList } from "../apis/serve.js"; export default { data() { return { active: 0, typeList: [], serviceList: [], type: "", finishedText: "", finished: false, pageNum: 1, pageSize: 10, contentHeight: 0, loading: false }; }, mounted() { this.getOrderStyle(); this.contentHeight = document.documentElement.clientHeight - 66 - 40 + "px"; }, methods: { async getOrderStyle() { let res = await FetchServeType(); if (res.data && res.data.success) { this.typeList = res.data.data; this.type = res.data.data[0].name; this.getTypeDate(); } }, getTypeDate() { this.pageNum = 1; this.type = this.typeList[this.active].name; this.serviceList = []; this.finishedText = ""; this.finished = false; this.getserviceList(); }, async getserviceList() { let toast = this.$toast.loading({ mask: true, message: "加载中..." }); const { type, pageNum, pageSize } = this; let params = { type, pageNum, pageSize }; let res = await FetchServeList(params); this.loading = false; toast.close(); if (res.data && res.data.success) { let list = (res.data.data && res.data.data.list) || []; if (pageNum > 1) { this.serviceList = [...this.serviceList, ...list]; } else { this.serviceList = list; } // 如果当前页数 = 总页数,则已经没有数据 if (res.data.data.pageNum === res.data.data.pages) { this.finished = true; this.finishedText = "- 没有更多了-"; } // 如果总页数大于当前页码,页码+1 if (res.data.data.pages > pageNum) { this.pageNum++; } } console.log("FetchServeList: ", this.serviceList); } } }; </script>
<style lang="scss" scoped> .pic-content { overflow-y: scroll; -webkit-overflow-scrolling: touch; .pic-box { /************************ 修改后代码**************************/ background-color: #fff; overflow: hidden; box-sizing: border-box; margin-bottom: 0.7rem; padding: 0.8rem; height: 16rem; border-radius: 4px; /************************ 修改后代码************************ **/ p:nth-of-type(1) { padding: 0.8rem 0; } p:nth-of-type(2) { color: red; } .pic-item { height: 11rem; flex-direction: column; justify-content: center; overflow: hidden; img { width: 100%; height: auto; border-radius: 4px; } } } } </style>
补充知识:vant里 List 组件可以与 PullRefresh 组件结合使用的一个小提示与小坑坑
小提示
List 组件可以与 PullRefresh 组件结合使用,可以实现列表下拉刷新的效果,但是当下拉刷新后更新的数据展示在页面上不能撑满 List 列表中的内容的时候,他并不会主动触发列表刷新,以至于来填满列表。
可以给list组件添加ref属性,然后在下拉刷新后,在下拉刷新的事件里手动调用this.$refs.listRef(你的list的ref名称).check()来触发列表加载后续的数据
// list组件 <van-list v-model="loading" ref="listRef" // 1. 绑定ref :finished="finished" finished-text="没有更多了" :error.sync="error" error-text="请求失败,点击重新加载" @load="onLoad" > // 下拉刷新的事件 onRefresh() { ...刷新成功后 // 2.手动去让下拉刷新后,去执行list列表的load事件 this.$refs.listRef.check() }
小坑坑
如果你把List 组件可以与 PullRefresh 组件结合使用封装成一个组件,然后在父组件中使用的时候,需要给封装的这个组件传list组件的v-model的值来控制list是否处于加载状态。
然后在父组件传 v-moel=“loading” 或者 :is-loading.sync=“loading” 传给子组件让他来控制子组件的list的v-model的控制load加载状态,按理说v-model 默认是 value 属性和 input 事件的组合,但是list组件的文件默认修改了,把传过去的value用 model: { prop: ‘loading' }修改了,所以我们在子组件接收的时候不能用value 要用loading
此图为vant的源码
// 父组件 给子组件传list的v-model的值 :is-loading.sync="loading" // 或写成 v-model="loading" // 子组件 list组件 // 子组件不能用value接收 // :value="isLoading" // 应该写成loading :loading="isLoading"
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