React Context API在Next.js中更改路由时获取默认数据

lsmepo6l  于 2023-08-04  发布在  React
关注(0)|答案(1)|浏览(125)

_app.tsx:

'use client';
import type { AppProps } from 'next/app'
import  NavBar  from '@/Components/NavBar/NavBar';
import { NextUIProvider } from '@nextui-org/react'
import BlogState from '@/Context/blogState';
export default function App({ Component, pageProps }: AppProps) {
 
  return<BlogState> 
    <NextUIProvider>
  <div style={{
    display:"flex",
    alignItems:"center",
    justifyContent:"center",
    fontSize:"50px",
    marginBottom:"30px"
  }}>Blog</div>
   <NavBar/>
   <Component {...pageProps} />
   </NextUIProvider>
   </BlogState>
}

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blogState.tsx:

import BlogContext from "./blogContext";
import { useState, useEffect } from 'react';

const BlogState:any=(props:any)=>{
    
    const [Login,SetLogin]=useState(false)
    const [userDetail,setUserDetail]=useState({})

    function setLogin(val:boolean){
        SetLogin(()=>val)
    }
    function setUserDetails(val:any){
        setUserDetail((prev)=>prev=val)
    }
    useEffect(()=>{
      console.log(Login)
      console.log(userDetail)
    },[Login,userDetail])

    return (
        <BlogContext.Provider value={{setUserDetails,setLogin,Login,userDetail}}>
            {props.children}
        </BlogContext.Provider>
    )
}

export default BlogState

登录

const [visible, setVisible] = useState(false)
  const [message,setMessage]=useState("")
  const {setUserDetails,setLogin}=useContext(blogContext)
  const[loading,setLoding]=useState(false)
  const[email,setEmail]=useState("")
  const[password,setPassword]=useState("")
  function LoginUser(){
    if(email==""||email==undefined||password==""||password==undefined){
      setMessage(()=>"Please fill all feilds")
      setVisible(()=>true)
      return;
    }
    setLoding(()=>true)
    axios.post("/api/Users/Login",
      {
        email:email,
        password:password
      }
    ).then((res:any)=>{
      if(res.data.details=="No User Found"){
        setMessage(()=>"Email is not connected with any account")
        setVisible(()=>true)
        setLoding(()=>false)
         return;
      }
      if(res.data.details=="Password Incorrect"){
        setMessage(()=>"Email or password incorrect")
        setVisible(()=>true)
        setLoding(()=>false)
         return;
      }
      setLoding(()=>false)
      setLogin(true)
      setUserDetails(res.data)
    }).catch(e=>console.log(e))
  }

首页:

export default function Home() {
  const{Login}=useContext(blogContext)
  console.log(Login)
  return <div style={{display:"flex",alignItems:"center",justifyContent:"center",flexDirection:"column"}}>
    <Quote title1='Conversation is king.' title2='Content is just something to talk about.'/>
   <div className={classes.blogs}>
      <CardB/>
    <CardB/>
    <CardB/>
    <CardB/>
    <CardB/>
    </div>
  </div>
}

NavBAr

import { Navbar, Link, Text, Avatar, Dropdown, Input } from "@nextui-org/react";
import { Layout } from "./Layout";
export default function App() {
  const collapseItems = [
    "Home",
    "Create",
    "Favourite",
    "About",
  ];

  return (
    <Layout>
      <Navbar isBordered variant="sticky">
        <Navbar.Toggle showIn="xs" />
        <Text b>Bloging Made Easy</Text>
        <Navbar.Content
          enableCursorHighlight
          activeColor="secondary"
          hideIn="xs"
          variant="highlight-rounded"
        >
          <Navbar.Link href="/">Home</Navbar.Link>
          <Navbar.Link href="/Create">Create</Navbar.Link>
          <Navbar.Link href="/Favourite">Favourite</Navbar.Link>
          <Navbar.Link href="#">About</Navbar.Link>
        </Navbar.Content>
        <Navbar.Content
          css={{
            "@xs": {
              w: "12%",
              jc: "flex-end",
            },
          }}
        >
          <Dropdown placement="bottom-right">
            <Navbar.Item>
              <Dropdown.Trigger>
                <Avatar
                  bordered
                  as="button"
                  color="secondary"
                  size="md"
                  src="https://media.istockphoto.com/id/1208175274/vector/avatar-vector-icon-simple-element-illustrationavatar-vector-icon-material-concept-vector.jpg?s=612x612&w=0&k=20&c=t4aK_TKnYaGQcPAC5Zyh46qqAtuoPcb-mjtQax3_9Xc="
                />
              </Dropdown.Trigger>
            </Navbar.Item>
            <Dropdown.Menu
              aria-label="User menu actions"
              color="secondary"
              onAction={(actionKey) => console.log({ actionKey })}
            >
              <Dropdown.Item key="profile" css={{ height: "$18" }}>
                <Text b color="inherit" css={{ d: "flex" }}>
                  Signed in as
                </Text>
                <Text b color="inherit" css={{ d: "flex" }}>
                  zoey@example.com
                </Text>
              </Dropdown.Item>
              <Dropdown.Item key="settings" withDivider>
                <Link href="/Account">Account</Link>
              </Dropdown.Item>
              <Dropdown.Item key="logout" withDivider color="error">
                Log Out
              </Dropdown.Item>
            </Dropdown.Menu>
          </Dropdown>
        </Navbar.Content>
        <Navbar.Collapse>
          {collapseItems.map((item, index) => (
            <Navbar.CollapseItem
              key={item}
              activeColor="secondary"
              css={{
                color: index === collapseItems.length - 1 ? "$error" : "",
              }}
              isActive={index === 2}
            >
              <Link
                color="inherit"
                css={{
                  minWidth: "100%",
                }}
                href={(item=='Home')?"/":`/${item}`}
              >
                {item}
              </Link>
            </Navbar.CollapseItem>
          ))}
        </Navbar.Collapse>
      </Navbar>
    </Layout>
  );
}


我尝试使用上下文API,但是每当我转到不同的组件时,值都变成默认值,尽管整个应用程序都 Package 在上下文中。
useEffect被触发并记录登录状态,userData工作正常并更新数据,但当它移动到不同的路由时,更新的数据消失了。
Link to a video showing the problem的数据。

icomxhvb

icomxhvb1#

您的视频显示,当您更改路由时,页面正在刷新(这是上下文重新初始化的原因)。我假设这是因为@nextui-org/react中的Link正在渲染一个普通的HMTL a元素,而没有任何Next.js功能。使用next/link代替:

import Link from "next/link";

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