wxml代码：

// 微信小程序的插值语法不支持直接使用Math
<wxs src="./ruler.wxs" module="math"></wxs>
<view class="ruler-container">
  <scroll-view scroll-left="{{scrollLeft}}" enhanced="{{true}}" bounces="{{false}}" scroll-x="true" class="scroll-box" bindscroll="scroll">
  	// 刻度
    <view class="ruler" style="width: {{(max-min)*6+1}}px;">
      <view wx:for="{{(max-min)+1}}" wx:key="item" style="display: flex;" class="scale" style="height: {{index%5===0?'20rpx':'12rpx'}};"></view>
    </view>
    // 刻度值
    <view class="scale-value" style="width: {{(max-min)*6}}px;">
      <view class="zero">{{min}}</view>
      <view class="scale-value-item" wx:for="{{math.ceil((max-min)/10)}}" wx:key="item">{{(index+1)*10+min}}</view>
    </view>
  </scroll-view>
  <view class="value-box">
    <text>{{value}}{{unit}}</text>
    <view class="line"></view>
  </view>
</view>

scrollLeft 保证能选择到最小值和最大值
bounces 关闭ios的回弹效果，回弹之前会有显示复数和大于最大值的情况（也可以不关闭，设置例如：min = val<min?min:val）

宽度："width: {{(max-min)*6+1}}px;"

6:间隔+刻度的宽度
+1 是额外加一个刻度，这样才完整。

高度："height: {{index%5===0?'20rpx':'12rpx'}};"

index%5===0： 5的倍数为长刻度，否则为短刻度

wxs代码：

module.exports.ceil = function (val) {
  return Math.ceil(val);
}

wxs模块文档

ts代码：

Component({
  properties: {
    min: {
      type: Number,
      value: 0
    },
    max: {
      type: Number,
      value: 100
    },
    unit: {
      type: String,
      value: '单位'
    },
    defaultValue: {
      type: Number,
      value: 0
    },
    setvalue:Function
  },
  data: {
    value: 0,
    cache: 0,
    scrollLeft: 0
  },
  onShow() {
    const value = this.properties.defaultValue
    this.setData({
      value,
      scrollLeft: value * 6
    })
  },
  attached() {
    const { defaultValue, min } = this.properties
    setTimeout(() => {
      this.setData({
        value: defaultValue,
        scrollLeft: (defaultValue - min) * 6
      })
    }, 100);
  },
  methods: {
    scroll: function (e: WechatMiniprogram.TouchEvent) {
      const scrollLeft = e.detail.scrollLeft + 1
      let value = Math.ceil(scrollLeft / 6)
      value = value ? value - 1 : value
      if (value % 10 === 0 && Math.floor(value / 10) !== this.data.cache) {
        wx.vibrateShort({ type: 'light' })
        this.setData({
          cache: Math.floor(value / 10)
        })
      }
      this.setData({
        value: value + this.properties.min
      })
      this.triggerEvent('setvalue',value + this.properties.min)
    }
  }
})

参数：
min：刻度最小值
max：刻度最大值
unit：单位
defaultValue：初始值
setvalue：自定义方法

css代码：

.ruler-container {
  position: relative;
  background: #FBFBFB;
  border-radius: 8rpx;

  .value-box {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    height: 70rpx;
    z-index: 99999999;
    width: 100rpx;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #46D2A1;
    font-size: 28rpx;
    line-height: 40rpx;
    padding-top: 8rpx;

    .line {
      width: 2px;
      height: 28rpx;
      background: #46D2A1;
    }
  }
}

.scroll-box {
  height: 122rpx;
}

.ruler {
  display: flex;
  align-items: flex-end;
  margin-top: 50rpx;
  padding: 0 50%;

  .scale {
    width: 1px;
    background-color: #C2C2C2;
    margin-right: 5px;
    &:last-child{
      margin-right: 0;
    }
  }
}

.scale-value {
  display: flex;
  padding: 0 50%;
  position: relative;
  overflow: hidden;
  .scale-value-item {
    color: #C2C2C2;
    font-size: 22rpx;
    width: 60px;
    line-height: 32rpx;
    text-align: center;
    &:last-child{
      width: 30px;
      transform: translateX(50%);
    }
  }
  .zero{
    width: 30px;
    color: #C2C2C2;
    font-size: 22rpx;
    line-height: 32rpx;
    transform: translateX(-50%);
    text-align: center;
  }
}