微信小程序实现点击导航标签滚动定位到对应位置

 <!-- 导航 -->
 <view class='nav' id="tab-con">
 <view class='resume-title'>伟安的简历</view>
 <view bindtap="toblock1" class="{{top<block2_ScrollTop-60?'specify-style':''}}">关于我</view>
 <view bindtap="toblock2" class="{{top>=block2_ScrollTop-60&&top<block3_ScrollTop-60?'specify-style':''}}">工作经验</view>
 <view bindtap="toblock3" class="{{top>=block3_ScrollTop-60?'specify-style':''}}">项目经验</view>
 </view>
 <!-- 中部内容 -->
 <view class="body">
 <scroll-view class="list" scroll-y="true" style="height:{{winHeight}}">
 <view id='block_1'>
 <!-- 第一个板块 -->
 </view>
 <view id='block_2'>
 <!-- 第二个板块 -->
 </view>
 <view id='block_3'>
 <!-- 第三个板块 -->
 </view>
 <view id='block_3'>
 <!-- 嗯，高度不够凑数的 -->
 </view>
 </scroll-view>
 </view>

.nav {
 display: flex;
 justify-content: space-around;
 align-items: center;
 height: 100rpx;
 background-color: rgba(0, 0, 0, 0.2);
 position: fixed;
 top: 0;
 left: 0;
 width: 100%;
 z-index: 9999;
}

.specify-style {
 font-weight: 800;
 position: relative;
}

.specify-style::before {
 content: '';
 border: solid transparent;
 border-width: 0px 14rpx 14rpx 14rpx;
 border-bottom-color: snow;
 position: absolute;
 z-index: 1000;
 margin-top: 36rpx;
 left: 37%;
}

#block_1,
#block_2,
#block_3 {
 height: 70vh;
}

#block_1 {
 background-color: aqua;
}

#block_2 {
 background-color: bisque;
}

#block_3 {
 background-color: cadetblue;
}

Page({
 data: {
 //当前离顶部滚动的距离
 top: 0,
 },
 // 监听滚动事件 scrollTop 滚动的距离
 onPageScroll: function (e) { // 获取滚动条当前位置
 // console.log(e)
 this.setData({
 top: e.scrollTop
 })
 if (e.scrollTop > this.data.tabScrollTop) {
 this.setData({
 tabFixed: true
 })
 // console.log("我锁定了")
 } else {
 this.setData({
 tabFixed: false
 })
 }
 },
 //点击跳转到板块一
 toblock1: function () {
 wx.pageScrollTo({
 /*
 *多减50是因为我的导航是悬浮的，会挡住部分内容
 *这里是1等于2rpx
 */
 scrollTop: this.data.block1_ScrollTop - 50
 })
 },
 //点击跳转到板块二
 toblock2: function () {
 wx.pageScrollTo({
 scrollTop: this.data.block2_ScrollTop - 50
 })
 },
 //点击跳转到板块三
 toblock3: function () {
 wx.pageScrollTo({
 scrollTop: this.data.block3_ScrollTop - 50
 })
 },
 onLoad: function (options) {
 let that = this
 // 高度自适应
 wx.getSystemInfo({
 success: function (res) {
 var clientHeight = res.windowHeight,
  clientWidth = res.windowWidth,
  rpxR = 750 / clientWidth;
 var calc = clientHeight * rpxR;
 that.setData({
  winHeight: calc
 });
 }
 });
 var query = wx.createSelectorQuery()
 //获取顶部的距离
 query.select('#tab-con').boundingClientRect(function (res) {
 var top = res.top;
 if (top == null) {
 var top = 0;
 }
 that.setData({
 tabScrollTop: top
 })
 }).exec()
 //获取板块一离顶部的距离
 query.select('#block_1').boundingClientRect(function (res) {
 that.setData({
 block_1ScrollTop: res.top
 })
 }).exec()
 //获取板块二离顶部的距离
 query.select('#block_2').boundingClientRect(function (res) {
 that.setData({
 block2_ScrollTop: res.top
 })
 }).exec()
 //获取板块三离顶部的距离
 query.select('#block_3').boundingClientRect(function (res) {
 that.setData({
 block3_ScrollTop: res.top
 })
 }).exec()
 },
})