今天小编给大家分享一下微信小程序如何实现下拉筛选功能的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
这是主要功能实现，我把它封装成了组件，在对应的地方使用，就可以实现贝壳找房相同的效果
好了，废话不多说，直接上代码吧
wxml:
<!--筛选栏-->
<view class="cxj-contents">
<view class="cxj-menu">
<view class="flex-view{{item.active?' active':''}}" wx:for="{{tabTxt}}" wx:key="" data-index="{{index}}"
bindtap="filterTab" wx:key="id">
<text class="flex_nav {{item.active?' active':''}}">{{item.text}}</text>
<icon class="iconfont {{item.active?' iconshanglaxiala-':'iconshanglaxiala-1'}}" />
</view>
</view>
</view>
<!--条件选项栏-->
<view class="cxj-tab-layout" hidden="{{!item.active}}" wx:for="{{tabTxt}}"
wx:for-index="index1" wx:for-item="item" wx:key="id" >
<scroll-view scroll-y class="scroll" >
<view class="cxj-tap-wrap">
<view>
<view wx:for="{{item.child}}" wx:for-item="item_child" wx:key="id" wx:for-index="index2">
<view class="title">{{item_child.title}}:</view>
<view class="cxj-tap-main">
<view class="navs {{item_childtype.selected==true?'active':''}}" wx:for="{{item_child.childType}}"
wx:for-item="item_childtype" wx:key="id" data-id="{{item_childtype.id}}" data-index="0"
data-txt="{{item_childtype.text}}" wx:for-index="index3">
<view bindtap="clickTabChild" data-index1="{{index1}}" data-index2="{{index2}}" data-index3="{{index3}}">{{item_childtype.text}}</view>
</view>
</view>
</view>
</view>
<view class="select_btn">
<button class="clear" bindtap="filterClears">清空条件</button>
<button class="submit" bindtap="filterSubmit">确定</button>
</view>
</view>
<!-- <view class="hidden" bindtap="closefilterTab"></view> -->
</scroll-view>
</view>wxss:
@import "../../style/iconfont.wxss";
/* 筛选栏 */
.cxj-contents{
position: sticky;
width: 100%;
height: 100rpx;
z-index: 1003;
/* box-shadow: 0px 15px 15px -15px rgba(200,200,200,0.6); */
overflow: hidden;
margin-top: -30rpx;
}
.cxj-menu {
background-color: #fff;
width: 100%;
height: 100%;
display: flex;
flex-wrap: nowrap;
font-size: 32rpx;
}
.cxj-menu .iconshanglaxiala-{
color: #FF6F00
}
.cxj-menu .iconshanglaxiala-1{
color: #333
}
.cxj-menu .flex_nav.active {color: #FF6F00;}
.flex-view {
-webkit-box-flex: 1;
-webkit-flex: 1;
-ms-flex: 1;
flex: 1;
overflow: hidden;
display: block;
text-align: center;
line-height: 100rpx;
}
.flex_nav{
font-size: 32rpx;
color: #333
}
.cxj-icon {
width: 24rpx;
height: 24rpx;
vertical-align: middle;
margin-left: 5px;
}
/* 筛选内容 */
.cxj-content {
width: 100%;
font-size: 28rpx;
z-index: 1009;
}
.cxj-content-li {
line-height: 60rpx;
text-align: center;
}
.cxj-tab-layout {
width: 100%;
overflow: hidden;
z-index: 1009;
/* height: 100%; */
/* padding-top: 20rpx; */
background-color: rgba(000,000,000,.5);
/* position: fixed; */
}
.hidden{
background-color: rgba(000,000,000,.5);
height: 100%;
z-index: 9999;
width: 100%;
}
.cxj-tab-layout .navs.active { background: #FFE5D9 !important;}
.cxj-tap-wrap{
padding: 0 30rpx;
background: #fff;
padding-bottom: 40rpx
}
.cxj-tap-main{
display: flex;
flex-flow: row wrap;
justify-content: space-between;
box-sizing: border-box;
}
.title{
margin-bottom: 20rpx
}
.scroll{
/* height: calc(100vh - 110px); */
}
.cxj-tab-layout .navs {
height: 88rpx;
line-height: 88rpx;
text-align: center;
font-size: 32rpx;
font-weight: 300;
background: #F3F3F3;
border-radius: 6rpx;
color: #333333;
margin-bottom: 24rpx;
flex: 0 0 31%;
}
.cxj-tap-main:after {
content: "";
width:31%;
}
/* 按钮 */
.select_btn{
display: flex;
justify-content: space-between;
align-items: center;
}
.select_btn .clear{
width: 31%;
font-size: 30rpx;
font-weight: 300;
border: 1px solid #FF8751;
border-radius: 6rpx;
background-color: #fff;
color: #FF8751;
height: 88rpx;
line-height: 54rpx;
margin: 0;
}
.select_btn .submit{
width: 66%;
font-size: 30rpx;
font-weight: 300;
background-color: #FF8751;
color: #fff;
height: 88rpx;
line-height: 60rpx;
margin: 0;
}js:
// 引入数据
const tabTxtArr = require('../../utils/filtrate.js');
Page({
/**
* 页面的初始数据
*/
data: {
tabTxt: [],
searchParam: [],
},
//切换导航按钮
filterTab(e) {
var that = this;
var data = JSON.parse(JSON.stringify(that.data.tabTxt));
var index = e.currentTarget.dataset.index;
var newTabTxt = data.map(function (e) {
e.active = false;
return e;
});
newTabTxt[index].active = !that.data.tabTxt[index].active;
this.setData({
tabTxt: data
})
},
// 点击导航按钮的条件
clickTabChild(e) {
// console.log(e.currentTarget.dataset)
let tabTxt = this.data.tabTxt;
let index1 = e.currentTarget.dataset.index1;
let index2 = e.currentTarget.dataset.index2;
let index3 = e.currentTarget.dataset.index3;
// console.log(index2)
// console.log(tabTxt[index1].child[index2].childType[index3].selected);
//1.在改变某个子按钮之前先把该子按钮组的所有选中状态selected改成false，
tabTxt[index1].child[index2].childType.forEach(e =>{
e.selected = false
})
//2.之后再把当前点击的按钮的状态改为true
tabTxt[index1].child[index2].childType[index3].selected = !tabTxt[index1].child[index2].childType[index3].selected;
this.setData({
tabTxt: tabTxt
})
// console.log(tabTxt)
},
// 清空条件
filterClears(e) {
var that = this;
let tabTxt = that.data.tabTxt;
tabTxt.forEach(e1 => {
console.log(e1)
e1.child.forEach(e2 => {
// console.log(e2)
e2.childType.forEach(e3 => {
console.log(e3)
if(e1.active){
e3.selected = false
}
})
})
})
this.setData({
tabTxt: tabTxt
})
},
// 确定按钮
filterSubmit(e) {
var that = this;
// console.log(that.data.searchParam);
let tabTxt = this.data.tabTxt;
let selectedTextArr = [];
tabTxt.forEach(e1 => {
// console.log(e1)
e1.active = false; //关闭抽屉
e1.child.forEach(e2 => {
// console.log(e2)
e2.childType.forEach(e3 => {
// console.log(e3)
if(e3.selected){
//选中的加载在一个数组中
selectedTextArr.push(e3.text)
}
})
})
})
this.setData({
tabTxt:tabTxt
})
console.log(selectedTextArr)
},
/**
* 生命周期函数--监听页面加载
*/
onLoad: function (options) {
let that = this;
that.setData({
tabTxt: tabTxtArr.tabTxt,
})
},
})以上就是“微信小程序如何实现下拉筛选功能”这篇文章的所有内容，感谢各位的阅读！相信大家阅读完这篇文章都有很大的收获，小编每天都会为大家更新不同的知识，如果还想学习更多的知识，请关注亿速云行业资讯频道。
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