未登录的时候文章内容不超过半屏不显示登录按钮

src/pages/preview/brand/article/article.tsx

@@ -1,4 +1,4 @@
-import {FC, useEffect, useMemo, useState} from "react";
+import {FC, useCallback, useEffect, useMemo, useState} from "react";
 import {Image, Text, View} from "@tarojs/components";
 import Taro, {useRouter} from "@tarojs/taro";
 import {ArticleRecord, brandApi} from "@/api";
@@ -7,44 +7,69 @@ import down from "@/static/img/doubleDown.png";
 import {Profile} from "@/store";
 import {parse} from "@/utils/marked/marked";
 import Empty from "@/components/empty/empty";
+import Spin from "@/components/spinner";
 
 
 const article: FC = () => {
   const {token} = Profile.useContainer()
+  const [enable, setEnable] = useState(true)
   const {id} = useRouter().params as unknown as { id: number }
   const [articleInfo, setArticleInfo] = useState<ArticleRecord>()
+  const [ultra, setUltra] = useState(true)
+  const globalData = Taro.getApp().globalData
+  const pageHeight = globalData.windowHeight - globalData.textBarHeight - globalData.statusBarHeight
   const {children} = useMemo(() => parse(articleInfo?.content || ''), [articleInfo])
+
   useEffect(() => {
-    getData()
-  }, [id])
+    const query = Taro.createSelectorQuery()
+    query.select('#childrenNode').boundingClientRect((res) => {
+      if (!Array.isArray(res)) {
+        if (res.height !== 240) {
+          console.log({childrenNode: res})
+          setUltra(pageHeight * .45 < res.height)
+        }
+      }
+    }).exec()
+  }, [children])
+
+  Taro.useReady(() => {
+    getData().then()
+  })
 
-  const getData = async () => {
+  const getData = useCallback(async () => {
     try {
       const data = await brandApi.articleInfo(id)
       Taro.setNavigationBarTitle({title: data.title})
+      if (data.content.length < 200) {
+        setUltra(false)
+      }
       setArticleInfo(data)
     } catch (e) {
     }
-  }
+    setEnable(false)
+  }, [id])
 
   function helloWorld() {
     return (
       <>
+        <Spin overlay enable={enable}/>
         <View style={{
           padding: '10px',
           height: !token ? Taro.getWindowInfo().windowHeight - 60 + 'px' : 'auto',
           overflow: !token ? 'hidden' : 'auto'
         }}>
-          {
-            children.length > 0 ? children : <Empty name='暂无数据'/>
-          }
+          <View id="childrenNode">
+            {
+              children.length > 0 ? children : <Empty name='暂无数据'/>
+            }
+          </View>
         </View>
         {
-          !token &&
+          !token && ultra &&
           <View className={styles.fixedBox}>
             <View className={styles['fixedBox-inner']}>
               <View className={styles['fixedBox-inner-icon']}>
-                <Image src={down}></Image>
+                <Image src={down}/>
               </View>
               <View className={styles['fixedBox-inner-box']} onClick={() => {
                 Taro.navigateTo({url: '/pages/login/login'})