小编4YJ*_*4YJ的帖子

使用 setInterval，我制作了 3 秒后更改屏幕的效果，使其看起来像移动应用程序。\n当我将其应用于 app.tsx 时，发生了错误。

登陆/index.tsx

import React, { useRef, useEffect, useState } from "react";\nimport * as S from "./style";\n\nconst Landing = () => {\n   const [sec, setSec] = useState<number>(3);\n   const time = useRef<number>(3);\n   const timerId = useRef<any>(null);\n\n   useEffect(() => {\n      timerId.current = setInterval(() => {\n         setSec(time.current % 60);\n         time.current -= 1;\n      }, 1000);\n\n      return () => clearTimeout(timerId.current);\n   }, []);\n\n   useEffect(() => {\n      if (time.current == 0) {\n         clearInterval(timerId.current);\n      }\n   }, [sec]);\n\n   if (time.current == 3) {\n …