1, Preparatory work

Software environment: wechat developer tool
Official download address: https://mp.weixin.qq.com/debug/wxadoc/dev/devtools/download.html

1. Basic needs.

• Anchor location based on scroll view

2. Case directory structure

2, Specific steps of program implementation

1. Anchor index.wxml code

a. Navigation scrolling

<!--pages/scrollnav/scrollnav.wxml-->
<!--Navigation scrolling  -->
<scroll-view class="tui-city-scroll" scroll-x="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
  <text bindtap="getStatus" id="NAV{{index}}" class="tui-nav-li {{index === status ? 'tui-nav-active' : ''}}" data-index="{{index}}" wx:for="{{navList}}" wx:key="">{{item}}</text>
</scroll-view>

b. List scrolling area

<!--List scrolling area  -->
<view class="tui-fixed-y">
  <scroll-view class="tui-city-scroll-y" scroll-y="true" scroll-into-view="NAV{{status}}" scroll-with-animation="true">
    <view wx:for="{{navList}}" wx:key="">
      <view id="NAV{{index}}" class="tui-list-head">{{item}}</view>
      <view class="tui-list-li">{{item}} list {{index}}</view>
    </view>
  </scroll-view>
</view>

2. Anchor index.wxss code

/* pages/scrollnav/scrollnav.wxss */
.tui-fixed-x{
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
}
.tui-city-scroll{
  height: 220rpx;
  line-height: 80rpx;
  width: 100%;
  white-space: nowrap;
}
.tui-city-scroll text{
  height: 120rpx;
  line-height: 80rpx;
  width: 100%;
  white-space: nowrap;
}
.tui-nav-li{
  font-size: 33rpx;
  padding: 0 10rpx;
}
.tui-nav-li:first-child{padding-left: 16rpx;}
.tui-nav-li:last-child{padding-right: 16rpx;}
.tui-nav-active{
  color: red;
  border-bottom: 3rpx solid red;
}

.tui-fixed-y{
  width: 100%;
  height: calc(100% - 80rpx);
  position: fixed;
  bottom: 0;
  left: 0;
}
.tui-city-scroll-y{
  padding: 0 20rpx;
  height: 100%;
  box-sizing: border-box;
}
.tui-list-head{
  height: 50px;
  line-height: 50px;
  text-align: center;
  font-size: 30rpx;
  color: blue;
}
.tui-list-li{
  height: 400px;
  padding: 10rpx;
  color: #fff;
  font-size: 50rpx;
  background-color: #2EB3FF;
}

3. Anchor index.js logic code

a. Function realization of anchor switch part

getStatus(e){
    this.setData({ status: e.currentTarget.dataset.index})
  }

3, Case operation rendering

4, Summary and remarks

There is no wechat applet to realize anchor location based on scroll view