<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>
page{
background: #f3f7f7;
}
.select_box{
background: #fff;
width: 160rpx;
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;
}
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
console.log(Index)
this.setData({
index: Index,
show: !this.data.show
});
},
onLoad: function (options) {
}
})
参考：
https://www.jb51.net/article/165418.htm