本文介绍了小程序头部吸顶的实现代码示例，分享给大家，也给自己留个笔记

demo 地址: https://github.com/iotjin/Jh_weapp

效果图：

吸顶主要是 position: sticky;

.header { background: rgb(230, 230, 230); height: 25px; line-height: 25px; padding-left: 30rpx; font-size: 13px; align-items: center; position: sticky; top: 0;}

js 代码：

Page({ data: { dataArr: [{ "AB_MonthDay": "30/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭1", "AB_Money": "11", "AB_Remark": "备注", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", },{ "AB_LeiBie": "吃饭1", "AB_Money": "22", "AB_Remark": "备注2", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", },{ "AB_LeiBie": "红包1", "AB_Money": "33", "AB_Remark": "备注33", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "收入", }, ] }, { "AB_MonthDay": "29/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭2", "AB_Money": "22", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "28/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭3", "AB_Money": "33", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "27/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "26/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "25/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "24/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "23/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "22/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "21/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "20/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, { "AB_MonthDay": "19/06", "AB_ZhiChu": "1111", "AB_ShouRu": "2222", "AB_Bill": [{ "AB_LeiBie": "吃饭4", "AB_Money": "44", "AB_Remark": "", "AB_Date": "2011-11-11 15:38:16", "AB_FenLei": "支出", }] }, ] }, onShow: function () { }, onPageScroll: function (res) { console.log(res.scrollTop); }})

wxml 代码：

<view class="main-bg"> <view wx:for="{{dataArr}}" wx:key="index" class="section"> <view class="header"> {{item.AB_MonthDay}}</view> <view wx:for="{{item.AB_Bill}}" wx:key="index" class="cell"> <view class="row1"> <view wx:if="{{item.AB_Remark}}" class="leibie">{{item.AB_LeiBie}} · {{item.AB_Remark}}</view> <view wx:else="{{!item.AB_Remark}}" class="leibie">{{item.AB_LeiBie}}</view> <view class='{{item.AB_FenLei=="收入"?"money2":"money"}}'>{{item.AB_Money}}</view> </view> </view> </view></view>

wxss 代码：

.header { background: rgb(230, 230, 230); height: 25px; line-height: 25px; padding-left: 30rpx; font-size: 13px; align-items: center; position: sticky; top: 0;}.cell { background: white; height: 44px; align-items: center; line-height: 44px; border-bottom: 1px solid rgb(230, 230, 230);}.row1 { margin-left: 30rpx; display: flex; justify-content: space-between;}.leibie { width: 70%; font-size: 30rpx; color: black; text-overflow: ellipsis; white-space: nowrap; overflow: hidden;}.money { font-size: 32rpx; color: black; font-weight: bold; margin-right: 30rpx;}.money2 { font-size: 32rpx; color: #38BC9D; font-weight: bold; margin-right: 30rpx;}

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