The WeChat applet does not have the same component as the drop-down box in HTML. If you want the same effect, you can only write one yourself. Let’s see the effect first.
Let's take a look at the code:
First WXML
<view class='select_box'>
<view class='select' catchtap='selectTap'>
<text class='select_text'>{
{selectData[index]}}</text>
<image class='select_img {
{show&&"select_img_rotate"}}' src='/image/gobottom.png'></image>
</view>
<view class='option_box' style='height:{
{show?(selectData.length>5?300:selectData.length*60):0}}rpx;'>
<text class='option' style='{
{index==selectData.length-1&&"border:0;"}}' wx:for='{
{selectData}}' wx:key='this' data-index='{
{index}}' catchtap='optionTap'>{
{item}}</text>
</view>
</view>
<!--
show&&"select_img_rotate"-----给显示框右边的下拉箭头添加动画
height:{
{show?(selectData.length>5?300:selectData.length*60):0}}rpx;-----给改变下拉框高度，实现下拉框的显示隐藏，每个下拉选项的高度为60，下拉框的最大高度这里设置的是300，所以这里写成当数据长度大于5时，下拉框高度为300，反之下拉框高度为数据长度乘以60
index==selectData.length-1&&"border:0;"-----取消下拉选项的最后一个的下边框
-->Then WXSS (if you don’t want animation, delete transition:transform 0.3s; and transition: height 0.3s; in wxss)
page{
background: #f3f7f7;
}
.select_box{
background: #fff;
width: 80%;
margin: 30rpx auto;
position: relative;
}
.select{
box-sizing: border-box;
width: 100%;
height: 70rpx;
border:1px solid #efefef;
border-radius: 8rpx;
display: flex;
align-items: center;
padding: 0 20rpx;
}
.select_text{
font-size: 30rpx;
flex: 1;
}
.select_img{
width: 40rpx;
height: 40rpx;
display: block;
transition:transform 0.3s;
}
.select_img_rotate{
transform:rotate(180deg);
}
.option_box{
position: absolute;
top: 70rpx;
width: 100%;
border:1px solid #efefef;
box-sizing: border-box;
height: 0;
overflow-y: auto;
border-top: 0;
background: #fff;
transition: height 0.3s;
}
.option{
display: block;
line-height: 40rpx;
font-size: 30rpx;
border-bottom: 1px solid #efefef;
padding: 10rpx;
}Here is the JS
Page({
data: {
show:false,//控制下拉列表的显示隐藏，false隐藏、true显示
selectData:['1','2','3','4','5','6'],//下拉列表的数据
index:0//选择的下拉列表下标
},
// 点击下拉显示框
selectTap(){
this.setData({
show: !this.data.show
});
},
// 点击下拉列表
optionTap(e){
let Index=e.currentTarget.dataset.index;//获取点击的下拉列表的下标
this.setData({
index:Index,
show:!this.data.show
});
},
onLoad: function (options) {
}
})
Reprinted from: https://www.jb51.net/article/165418.htm