uni-combox 使用对象数组，解决选错需刷新问题，类似于element ui＜el-select＞
element
A Vue.js 2.0 UI Toolkit for Web
项目地址：https://gitcode.com/gh_mirrors/eleme/element
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uni-combox选择对象数组
<uni-combox labelKey="label" valueKey="id" label="" :candidates="dataSource" placeholder="请选择" v-model="selectValue"></uni-combox>
labelKey 显示下拉列表的key
valueKey 所需要value的key值
label 同uni-combox的label
candidates 筛选的对象数组
下面是template demo代码
<template>
<view style="margin-top: 100rpx;display: flex;" >
<uni-combox labelKey="label" valueKey="id" label="" :candidates="dataSource" placeholder="请选择" v-model="selectValue"></uni-combox>
<view class="title" style="margin-left: 50rpx;">值 :{{ selectValue }}</view>
</view>
</template>
<script>
export default {
data(){
return {
dataSource:[
{
label:'选项1',
id:'1'
},
{
label:'选项2',
id:'2'
},
],
selectValue:"",
}
}
}
</script>
<style>
</style>下面是修改后的uni-combox代码
<template>
<view class="uni-combox" :class="border ? '' : 'uni-combox__no-border'">
<view v-if="label" class="uni-combox__label" :style="labelStyle">
<text>{{label}}</text>
</view>
<view class="uni-combox__input-box">
<input class="uni-combox__input" type="text" :placeholder="placeholder"
placeholder-class="uni-combox__input-plac" v-model="inputVal" @input="onInput" @focus="onFocus"
@blur="onBlur" />
<uni-icons :type="showSelector? 'top' : 'bottom'" size="14" color="#999" @click="toggleSelector">
</uni-icons>
</view>
<view class="uni-combox__selector" v-if="showSelector">
<view class="uni-popper__arrow"></view>
<scroll-view scroll-y="true" class="uni-combox__selector-scroll">
<view class="uni-combox__selector-empty" v-if="filterCandidatesLength === 0">
<text>{{emptyTips}}</text>
</view>
<view class="uni-combox__selector-item" v-for="(item,index) in filterCandidates" :key="index"
@click="onSelectorClick(index)">
<text>{{item[`${labelKey}`]}}</text>
</view>
</scroll-view>
</view>
</view>
</template>
<script>
/**
* Combox 组合输入框
* @description 组合输入框一般用于既可以输入也可以选择的场景
* @tutorial https://ext.dcloud.net.cn/plugin?id=1261
* @property {String} label 左侧文字
* @property {String} labelWidth 左侧内容宽度
* @property {String} placeholder 输入框占位符
* @property {Array} candidates 候选项列表
* @property {String} emptyTips 筛选结果为空时显示的文字
* @property {String} value 组合框的值
*/
export default {
name: 'uniCombox',
emits: ['input', 'update:modelValue'],
props: {
border: {
type: Boolean,
default: true
},
label: {
type: String,
default: ''
},
labelWidth: {
type: String,
default: 'auto'
},
placeholder: {
type: String,
default: ''
},
candidates: {
type: Array,
default () {
return []
}
},
emptyTips: {
type: String,
default: '无匹配项'
},
labelKey: {
type: String,
default: 'dictName'
},
valueKey:{
type: String,
default: 'dictId'
},
// #ifndef VUE3
value: {
type: [String, Number],
default: ''
},
// #endif
// #ifdef VUE3
modelValue: {
type: [String, Number],
default: ''
},
// #endif
},
data() {
return {
showSelector: false,
inputVal: '',
dictVal:"",
filterCandidates:[]
}
},
computed: {
labelStyle() {
if (this.labelWidth === 'auto') {
return ""
}
return `width: ${this.labelWidth}`
},
// 为了点击选择能够显示所有选项，把这个filterCandidates放在data中
// filterCandidates() {
// return this.candidates.filter((item) => {
// console.log(item,this.labelKey)
// return item[`${this.labelKey}`].toString().indexOf(this.inputVal) > -1
// })
// },
filterCandidatesLength() {
return this.filterCandidates.length
}
},
watch: {
// #ifndef VUE3
value: {
handler(newVal) {
this.dictVal = newVal
},
immediate: true
},
// #endif
// #ifndef VUE3
// 因为获取列表是个异步的过程，需要对列表进行监听
candidates: function(arr){
if(arr.length>0 && this.dictVal){
let obj = arr.find((item,index) => {
return this.dictVal == item[`${this.valueKey}`]
})
this.inputVal = obj[`${this.labelKey}`]
}
this.filterCandidates = arr.filter((item) => {
return item[`${this.labelKey}`].toString().indexOf(this.inputVal) > -1
})
console.log("#####",this.filterCandidates)
},
// #endif
// #ifdef VUE3
modelValue: {
handler(newVal) {
// this.inputVal = newVal
if( this.candidates.length>0){
let obj = this.candidates.find((item,index) => {
return newVal == item[`${this.valueKey}`]
})
this.inputVal = obj[`${this.labelKey}`]
}
},
immediate: true
},
// #endif
// #ifdef VUE3
modelValue: {
handler(newVal) {
// this.inputVal = newVal
if( this.candidates.length>0){
let obj = this.candidates.find((item,index) => {
return newVal == item[`${this.valueKey}`]
})
this.inputVal = obj[`${this.labelKey}`]
}
},
immediate: true
},
// #endif
},
methods: {
toggleSelector() {
this.showSelector = !this.showSelector
},
onFocus() {
this.filterCandidates = this.candidates
this.showSelector = true
},
onBlur() {
setTimeout(() => {
this.showSelector = false
}, 153)
},
onSelectorClick(index) {
this.dictVal = this.filterCandidates[index][`${this.valueKey}`]
//this.dictVal 的赋值一定要在this.inputVal前执行，
//因为this.filterCandidates会监听this.inputVal的变化被重新赋值
//这样在选择列表中非第一个选项会报错
this.inputVal = this.filterCandidates[index][`${this.labelKey}`]
this.showSelector = false
this.$emit('input',this.dictVal)
this.$emit('update:modelValue', this.dictVal)
},
onInput() {
this.filterCandidates = this.candidates.filter((item) => {
console.log(item,this.labelKey)
return item[`${this.labelKey}`].toString().indexOf(this.inputVal) > -1
})
setTimeout(() => {
this.$emit('input', this.dictVal)
this.$emit('update:modelValue', this.dictVal)
})
}
}
}
</script>
<style lang="scss" >
.uni-combox {
font-size: 14px;
border: 1px solid #DCDFE6;
border-radius: 4px;
padding: 6px 10px;
position: relative;
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
// height: 40px;
flex-direction: row;
align-items: center;
// border-bottom: solid 1px #DDDDDD;
}
.uni-combox__label {
font-size: 16px;
line-height: 22px;
padding-right: 10px;
color: #999999;
}
.uni-combox__input-box {
position: relative;
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
flex: 1;
flex-direction: row;
align-items: center;
}
.uni-combox__input {
flex: 1;
font-size: 14px;
height: 22px;
line-height: 22px;
}
.uni-combox__input-plac {
font-size: 14px;
color: #999;
}
.uni-combox__selector {
/* #ifndef APP-NVUE */
box-sizing: border-box;
/* #endif */
position: absolute;
top: calc(100% + 12px);
left: 0;
width: 100%;
background-color: #FFFFFF;
border: 1px solid #EBEEF5;
border-radius: 6px;
box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
z-index: 2;
padding: 4px 0;
}
.uni-combox__selector-scroll {
/* #ifndef APP-NVUE */
max-height: 200px;
box-sizing: border-box;
/* #endif */
}
.uni-combox__selector-empty,
.uni-combox__selector-item {
/* #ifndef APP-NVUE */
display: flex;
cursor: pointer;
/* #endif */
line-height: 36px;
font-size: 14px;
text-align: center;
// border-bottom: solid 1px #DDDDDD;
padding: 0px 10px;
}
.uni-combox__selector-item:hover {
background-color: #f9f9f9;
}
.uni-combox__selector-empty:last-child,
.uni-combox__selector-item:last-child {
/* #ifndef APP-NVUE */
border-bottom: none;
/* #endif */
}
// picker 弹出层通用的指示小三角
.uni-popper__arrow,
.uni-popper__arrow::after {
position: absolute;
display: block;
width: 0;
height: 0;
border-color: transparent;
border-style: solid;
border-width: 6px;
}
.uni-popper__arrow {
filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.03));
top: -6px;
left: 10%;
margin-right: 3px;
border-top-width: 0;
border-bottom-color: #EBEEF5;
}
.uni-popper__arrow::after {
content: " ";
top: 1px;
margin-left: -6px;
border-top-width: 0;
border-bottom-color: #fff;
}
.uni-combox__no-border {
border: none;
}
</style>
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