vue自定义穿梭框支持远程滚动加载的实现方法
作者:SunnyRun!
这篇文章主要介绍了vue自定义穿梭框支持远程滚动加载,iview是全局注入,基本使用原先的类名进行二次创建公共组件,修改基础js实现逻辑,本文结合实例代码介绍的非常详细,需要的朋友可以参考下
*分享一个使用比较久的🪜
技术框架公司的选型(老项目):vue2 + iview-ui方案的实现思路是共性的,展现UI样式需要你们自定义进行更改;因为iview是全局注入,基本使用原先的类名进行二次创建公共组件,修改基础js实现逻辑;
需求分析:实现远程滚动加载数据的穿梭框
1、创建自定义穿梭框,分左侧和右侧数据
2、依赖后端接口,左侧是左侧数据,右侧是右侧数据
3、定义好出入参数,支持回显内容及选中内容的去重处理
4、绑定对应的v-model数据响应
5、滚动加载数据,区分左右区域;添加自定义指令进行监听
6、滚动加载数据,不丢失已选中的数据,或去重已选中数据
7、支持左右侧的远程搜索功能,左右互不影响,检索数据放组件外部进行
1、代码信息
创建ivu-transfer.vue文件;依赖iviewUI请依据自己的样式进行拷贝;
1.1 自定义滚动监听指令
/** 远程滚动加载 */ import Vue from 'vue' Vue.directive("loadTransfer", { bind(el, binding) { const select_dom = el.querySelectorAll('.ivu-transfer-list .ivu-transfer-list-content'); select_dom.forEach((item, index) => { item.addEventListener('scroll', function () { const height = this.scrollHeight - this.scrollTop - 1 <= this.clientHeight; if (height) { binding.value(index) } }) }) } })
1.2 自定义穿梭框代码
<template> <div class="ivu-transfer"> <div class="ivu-transfer-list" :style="{ width: listStyle.width, height: listStyle.height }" > <div class="ivu-transfer-list-header"> <Checkbox :value="checkLeftAll" @on-change="handleAllLeftCheck" ></Checkbox> <span class="ivu-transfer-list-header-title">源列表</span> <span class="ivu-transfer-list-header-count"> {{ leftDataSource.length }} </span> </div> <div class="ivu-transfer-list-body"> <div class="ivu-transfer-list-content"> <CheckboxGroup v-model="checkLeftAllGroup"> <Checkbox :key="index" :label="item.value" class="ivu-transfer-list-content-item" v-for="(item, index) in leftDataSource" >{{ item.label + `${item.description ? ` - ${item.description}` : ""}` }}</Checkbox > </CheckboxGroup> <div v-if="!leftDataSource.length" class="ivu-transfer-list-content-not-found" > 列表为空 </div> </div> </div> </div> <div class="ivu-transfer-operation"> <Button size="small" type="primary" icon="ios-arrow-back" @click="handleClickArrowBack" :disabled="!checkRightAllGroup.length" ></Button> <Button size="small" type="primary" icon="ios-arrow-forward" @click="handleClickArrowForward" :disabled="!checkLeftAllGroup.length" ></Button> </div> <div class="ivu-transfer-list" :style="{ width: listStyle.width, height: listStyle.height }" > <div class="ivu-transfer-list-header"> <Checkbox :value="checkRightAll" @on-change="handleAllRightCheck" ></Checkbox> <span class="ivu-transfer-list-header-title">目的列表</span> <span class="ivu-transfer-list-header-count"> {{ rightDataSource.length }} </span> </div> <div class="ivu-transfer-list-body"> <div class="ivu-transfer-list-content"> <CheckboxGroup v-model="checkRightAllGroup"> <Checkbox :key="index" :label="item.value" class="ivu-transfer-list-content-item" v-for="(item, index) in rightDataSource" >{{ item.label + `${item.description ? ` - ${item.description}` : ""}` }} </Checkbox> </CheckboxGroup> <div v-if="!rightDataSource.length" class="ivu-transfer-list-content-not-found" > 列表为空 </div> </div> </div> </div> </div> </template> <script> const methods = { // 点击左侧全选 handleAllLeftCheck() { this.checkLeftAll = !this.checkLeftAll; if (this.checkLeftAll) { this.checkLeftAllGroup = this.leftDataSource.map(item => item.value); } else { this.checkLeftAllGroup = []; } }, // 点击右侧全选 handleAllRightCheck() { this.checkRightAll = !this.checkRightAll; if (this.checkRightAll) { this.checkRightAllGroup = this.rightDataSource.map(item => item.value); } else { this.checkRightAllGroup = []; } }, // 点击向右数据 handleClickArrowBack() { this.moveCheckedData("left"); }, // 点击向左数据 handleClickArrowForward() { this.moveCheckedData("right"); }, moveCheckedData(direction) { const newLeftDataSource = []; const newRightDataSource = []; const dataSource = direction === "left" ? this.rightDataSource : this.leftDataSource; dataSource.forEach(item => { const index = direction === "left" ? this.checkRightAllGroup.indexOf(item.value) : this.checkLeftAllGroup.indexOf(item.value); if (index !== -1) { direction === "left" ? newLeftDataSource.push(item) : newRightDataSource.push(item); } else { direction === "left" ? newRightDataSource.push(item) : newLeftDataSource.push(item); } }); this.leftDataSource = direction === "left" ? [...this.leftDataSource, ...newLeftDataSource] : newLeftDataSource; this.rightDataSource = direction === "left" ? newRightDataSource : [...this.rightDataSource, ...newRightDataSource]; this.checkLeftAll = false; this.checkRightAll = false; this.checkLeftAllGroup = []; this.checkRightAllGroup = []; this.$emit("on-change", this.leftDataSource, this.rightDataSource, direction); }, filterDataMethods() { const rightValues = new Set(this.rightDataSource.map(opt => opt.value)); this.leftDataSource = this.leftDataSource.filter( item => !rightValues.has(item.value) ); this.$nextTick(() => { const leftValues = new Set(this.leftDataSource.map(opt => opt.value)); this.rightDataSource = this.rightDataSource.filter( opt => !leftValues.has(opt.value) ); }); } }; export default { props: { listStyle: { type: Object, default: () => ({ width: "250px", height: "380px" }) }, leftData: { type: Array, require: true, default: () => [] }, rightData: { type: Array, require: true, default: () => [] } }, data() { return { checkLeftAll: false, checkRightAll: false, checkRightAllGroup: [], checkLeftAllGroup: [], leftDataSource: [], rightDataSource: [] }; }, watch: { leftData(newVal) { this.leftDataSource = newVal; this.filterDataMethods(); }, rightData(newVal) { this.rightDataSource = newVal || []; this.filterDataMethods(); } }, mounted() { this.$nextTick(() => { this.$emit("on-change", this.leftDataSource, this.rightDataSource); }) }, methods }; </script> <style lang="less" scoped> .ivu-transfer-list-content-item { width: 100%; margin-left: -0.3em; } .ivu-transfer-list-content-not-found { display: block; } </style>
2、内容使用api介绍
1、树形结构入参:dataSource=[{label: '测试',value: 1, description: '拼接内容' }],
2、标签引用:<IvuTransfer :leftData="dataSource" :rightData="targetKeys" @on-change="handleChange" v-loadTransfer="handleLoadMore" />
3、相关api说明文档在文章底部
<template> <div class="customSearch"> <Input search clearable v-model="formLeftInput" placeholder="请输入搜索内容" @on-clear="handleOnLeftInput" @on-search="handleOnLeftInput" /> <div style="width: 50px"></div> <Input search clearable v-model="formRightInput" placeholder="请输入搜索内容" @on-clear="handleOnRightInput" @on-search="handleOnRightInput" /> </div> <IvuTransfer :leftData="dataSource" :rightData="targetKeys" @on-change="handleChange" v-loadTransfer="handleLoadMore" /> </template> // 远程滚动加载 handleLoadMore(index) { if (index === 0 && this.dataLeftHasMore && !this.isShowLoading) { this.curLeftPage++; this.getLeftMockData(); } if (index === 1 && this.dataRightHasMore && !this.rightLoading) { this.curRightPage++; this.getRightTargetKeys(); } }, // 触发选中移动 handleChange(newLeftTargetData, newRightTargetKeys, direction) { this.dataSource = [...newLeftTargetData]; this.targetKeys = [...newRightTargetKeys]; if (direction === "right") { return this.remoteCheckPage(); } if (direction === "left") { return this.remoteRightCheckPage(); } }, getLeftData() {}, getRightData() {}
参数 | 说明 | 类型 | 默认值 | 必填项 |
---|---|---|---|---|
leftData | [{}]-label,value结构 | Array[] | [] | 是 |
rightData | [{}]-label,value结构 | Array[] | [] | 是 |
on-change | 数据变更触发 | newLeft,newRight, direction | 无 | 否 |
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