doc: update docs

src/components/cascader-view/demos/demo1.tsx

@@ -1,28 +1,11 @@
 import React, { useState } from 'react'
-import { CascaderView, Button } from 'antd-mobile'
+import { CascaderView } from 'antd-mobile'
 import { DemoBlock } from 'demos'
 
 import { options, sameValueOptions } from '../../cascader/demos/data'
 
-const list1 = [
-  {
-    label: '西湖区',
-    value: '西湖区',
-  },
-  {
-    label: '上城区',
-    value: '上城区',
-  },
-  {
-    label: '余杭区',
-    value: '余杭区',
-    disabled: true,
-  },
-]
-
 export default () => {
   const [value, setValue] = useState<string[]>([])
-  const [list, setList] = useState<any[]>([])
 
   return (
     <>
@@ -53,9 +36,8 @@ export default () => {
           }}
         />
       </DemoBlock>
-      <DemoBlock title='开启loding并且options为空时会开启骨架屏' padding='0'>
-        <CascaderView options={list} loading={!list.length} />
-        <Button onClick={() => setList(list1)}>push数据</Button>
+      <DemoBlock title='开启骨架屏' padding='0'>
+        <CascaderView options={options} loading />
       </DemoBlock>
     </>
   )