微信小程序数字滚动效果

效果图

.wxml

<view class="container">
    <view class="container-num" wx:for="{{number}}" wx:key="index">
    <view class="num-container" style="--h:{{h}}px;--y:{{-item * h }}px;">
      <view wx:for="{{10}}" wx:key="index" class="num-item">
        {{index}}
      </view>
    </view>
  </view>
</view>
<button bind:tap="getRandomNum">生成随机数</button>

.js

Page({
  data: {
    number:'0',
    h:30,
  },
  getRandomNum(){
    const num = `${Math.floor(Math.random() * 1000)}`;
    this.setData({
      number:num
    })
  }
})

.wxss

.container{
  padding: 100rpx 0;
  display: flex;
  justify-content: center;
}
.container-num{
  overflow: hidden;
}
.num-container{
  height: var(--h);
  transform:translateY(var(--y));
  transition-duration: 1s;
  margin: 0 1px;
}
.num-item{
  height: var(--h);
  flex-direction: column;
  display: flex;
  align-items: center;
  justify-content: center;
}

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