微信小程序设置滚动条

<!--垂直滚动，这里必须设置高度-->
<scroll-view scroll-y="true" style="height: 200px">
    <view style="background: red;  100px; height: 100px" ></view>
    <view style="background: green;  100px; height: 100px"></view>
    <view style="background: blue;  100px; height: 100px"></view>
    <view style="background: yellow;  100px; height: 100px"></view>
</scroll-view>

<!--  white-space
  normal: 正常无变化(默认处理方式.文本自动处理换行.假如抵达容器边界内容会转到下一行)
  pre: 保持HTML源代码的空格与换行,等同与pre标签
  nowrap: 强制文本在一行,除非遇到br换行标签
  pre-wrap: 同pre属性,但是遇到超出容器范围的时候会自动换行
  pre-line: 同pre属性,但是遇到连续空格会被看作一个空格
  inherit: 继承
-->
<!--水平滚动-->
<scroll-view scroll-x="true" style=" white-space: nowrap; display: flex" >
<!--  display: inline-block-->
  <view style="background: red;  200px; height: 100px; display: inline-block" ></view>
  <view style="background: green;  200px; height: 100px; display: inline-block"></view>
  <view style="background: blue;  200px; height: 100px; display: inline-block"></view>
  <view style="background: yellow;  200px; height: 100px; display: inline-block"></view>
</scroll-view>