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主页 / coding / 问题

问题[react-native](coding)

Martin Hope
addictedmark 69
Asked: 2025-04-16 17:45:25 +0800 CST

无法读取未定义的属性“StackView”

  • 5

我尝试实现 React 导航,但尽管我的代码结构符合导航标准,却仍然遇到很多错误。我不知道是什么错误导致我无法导航组件。

我使用的是裸 react-native,而不是 expo

我原本希望能够从其他组件导航而不会出现这些问题。希望有人能解决这个问题。谢谢

App.js

import { StatusBar } from 'expo-status-bar';
import { StyleSheet, Text, View } from 'react-native';
import * as React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import AppNavigator from './components/AppNavigator';
import {StorageCon} from './components/StorageCon';

export default function App() {
  return (
    <NavigationContainer>
   
      <AppNavigator/>
   
    </NavigationContainer>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

AppNavigator.js

import { createStackNavigator } from "@react-navigation/stack";
import TitlescreenPage from "./TitlescreenPage";

const Stack = createStackNavigator();

const AppNavigator=()=>{

    return(
        <>
        <Stack.Navigator>
            <Stack.Screen name = "titlescreen" component={TitlescreenPage} />
        </Stack.Navigator>

        </>
    );
};

export default AppNavigator;

在此处输入图片描述 在此处输入图片描述

react-native
  • 1 个回答
  • 19 Views
Martin Hope
ShivamQmr
Asked: 2025-04-05 20:10:33 +0800 CST

构建 React Native + Expo + Nativewind 应用时出错。错误:找不到模块“nativewind/metro”

  • 6

我已按照NativeWind 的官方安装指南Error: Cannot find module 'nativewind/metro'进行操作。但我还是遇到了问题。我使用的是 Expo SDK 52。

我的软件包.json:

{
  "name": "mobile",
  "main": "expo-router/entry",
  "version": "1.0.0",
  "scripts": {
    "start": "expo start",
    "reset-project": "node ./scripts/reset-project.js",
    "android": "expo start --android",
    "ios": "expo start --ios",
    "web": "expo start --web",
    "test": "jest --watchAll",
    "lint": "expo lint"
  },
  "jest": {
    "preset": "jest-expo"
  },
  "dependencies": {
    "@expo/vector-icons": "^14.0.2",
    "@react-native-async-storage/async-storage": "^2.1.0",
    "@react-native-community/cli": "latest",
    "@react-navigation/bottom-tabs": "^7.2.0",
    "@react-navigation/native": "^7.0.14",
    "@react-navigation/native-stack": "^7.2.0",
    "@react-navigation/stack": "^7.1.1",
    "axios": "^1.8.4",
    "expo": "~52.0.11",
    "expo-blur": "~14.0.1",
    "expo-constants": "~17.0.3",
    "expo-font": "~13.0.1",
    "expo-haptics": "~14.0.0",
    "expo-linking": "~7.0.3",
    "expo-router": "^4.0.15",
    "expo-splash-screen": "~0.29.13",
    "expo-status-bar": "~2.0.0",
    "expo-symbols": "~0.2.0",
    "expo-system-ui": "~4.0.4",
    "expo-web-browser": "~14.0.1",
    "nativewind": "^2.0.11",
    "react": "18.3.1",
    "react-dom": "^18.3.1",
    "react-native": "0.76.3",
    "react-native-gesture-handler": "^2.21.2",
    "react-native-get-random-values": "^1.11.0",
    "react-native-reanimated": "3.16.2",
    "react-native-safe-area-context": "4.12.0",
    "react-native-screens": "^4.4.0",
    "react-native-vector-icons": "^10.2.0",
    "react-native-web": "~0.19.13",
    "react-native-webview": "13.12.2",
    "tailwindcss": "3.4.17"
  },
  "devDependencies": {
    "@babel/core": "^7.25.2",
    "@tsconfig/react-native": "^3.0.5",
    "@types/jest": "^29.5.14",
    "@types/react": "^18.3.20",
    "@types/react-test-renderer": "^19.0.0",
    "jest": "^29.2.1",
    "jest-expo": "~52.0.2",
    "metro": "^0.82.1",
    "react-test-renderer": "18.3.1",
    "tailwindcss": "^3.3.2",
    "typescript": "^5.8.2"
  },
  "private": true
}

错误:

Starting project at D:\VSCode WorkSpace\Project\mobile
Error: Cannot find module 'nativewind/metro'
Require stack:
- D:\VSCode WorkSpace\Project\mobile\metro.config.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\import-fresh\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\cosmiconfig\dist\loaders.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\cosmiconfig\dist\createExplorer.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\cosmiconfig\dist\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\metro-config\src\loadConfig.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\metro-config\src\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\server\metro\instantiateMetro.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\server\metro\MetroBundlerDevServer.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\server\DevServerManager.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\startAsync.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\bin\cli
- D:\VSCode WorkSpace\Project\mobile\node_modules\expo\bin\cli
Error: Cannot find module 'nativewind/metro'
Require stack:
- D:\VSCode WorkSpace\Project\mobile\metro.config.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\import-fresh\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\cosmiconfig\dist\loaders.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\cosmiconfig\dist\createExplorer.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\cosmiconfig\dist\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\metro-config\src\loadConfig.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\metro-config\src\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\server\metro\instantiateMetro.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\server\metro\MetroBundlerDevServer.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\server\DevServerManager.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\startAsync.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\src\start\index.js
- D:\VSCode WorkSpace\Project\mobile\node_modules\@expo\cli\build\bin\cli
- D:\VSCode WorkSpace\Project\mobile\node_modules\expo\bin\cli
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:1145:15)
    at Function.Module._load (node:internal/modules/cjs/loader:986:27)
    at Module.require (node:internal/modules/cjs/loader:1233:19)
    at require (node:internal/modules/helpers:179:18)
    at Object.<anonymous> (D:\VSCode WorkSpace\Project\mobile\metro.config.js:2:28)
    at Module._compile (node:internal/modules/cjs/loader:1358:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1416:10)
    at Module.load (node:internal/modules/cjs/loader:1208:32)
    at Function.Module._load (node:internal/modules/cjs/loader:1024:12)
    at Module.require (node:internal/modules/cjs/loader:1233:19)

Tailwind IntelliSense 也出现错误:

[Error - 5:44:00 PM] Unable to load config file at: D:/VSCode WorkSpace/Project/mobile/tailwind.config.js
[Error - 5:44:00 PM] Error: Can't resolve 'nativewind/preset' in 'D:\VSCode WorkSpace\Project\mobile'
   at d (c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:130:7155)
    at c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:131:713
    at c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:134:405
    at eval (eval at create (c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:5:78), <anonymous>:15:1)
    at c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:134:405
    at eval (eval at create (c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:5:78), <anonymous>:27:1)
    at c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:134:7916
    at c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:134:405
    at eval (eval at create (c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:5:78), <anonymous>:15:1)
    at c:\Users\user\.vscode\extensions\bradlc.vscode-tailwindcss-0.14.13\dist\tailwindServer.js:134:405 {
  details: "resolve 'nativewind/preset' in 'D:\\VSCode WorkSpace\\Project\\mobile'\n" +
    '  Parsed request is a module\n' +
    '  using description file: D:\\VSCode WorkSpace\\Project\\mobile\\package.json (relative path: .)\n' +
    '    resolve as module\n' +
    '      looking for modules in D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\n' +
    '        existing directory D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\n' +
    '          using description file: D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\package.json (relative path: .)\n' +
    '            using description file: D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\package.json (relative path: ./preset)\n' +
    '              no extension\n' +
    "                D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\preset doesn't exist\n" +
    '              .js\n' +
    "                D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\preset.js doesn't exist\n" +
    '              .json\n' +
    "                D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\preset.json doesn't exist\n" +
    '              .node\n' +
    "                D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\preset.node doesn't exist\n" +
    '              as directory\n' +
    "                D:\\VSCode WorkSpace\\Project\\mobile\\node_modules\\nativewind\\preset doesn't exist\n" +
    "      D:\\VSCode WorkSpace\\Project\\node_modules doesn't exist or is not a directory\n" +
    "      D:\\VSCode WorkSpace\\node_modules doesn't exist or is not a directory\n" +
    "      D:\\node_modules doesn't exist or is not a directory"
}

尝试过:删除node_modules和,用和package-lock.json重新安装。没有用。npm installnpm install --save-dev metro

react-native
  • 1 个回答
  • 31 Views
Martin Hope
robo
Asked: 2025-02-04 17:45:52 +0800 CST

Expo 中的 React Query 不会重新获取

  • 5

我正在使用 Expo Navigation(Stack Navigator)和 React Query 构建一个 Expo React Native 应用。在屏幕之间导航时(例如,从主页到测试屏幕再返回),我需要在返回上一个屏幕时重新获取数据。问题是组件在导航时不会重新安装,因此查询功能不会触发/

react-native
  • 1 个回答
  • 24 Views
Martin Hope
Wagner Gauer
Asked: 2025-01-19 09:20:53 +0800 CST

当我使用 react-redux 进行状态管理时,如何让我的应用向用户显示身份验证组或普通应用?

  • 6

我正在尝试使用用户状态来确定我的应用是否显示身份验证组,但现在我明白我的设置无法工作,因为根布局组件无法访问状态。

我怎样才能实现我的目标?

import {
  DarkTheme,
  DefaultTheme,
  ThemeProvider,
} from "@react-navigation/native";
import { useFonts } from "expo-font";
import { Stack } from "expo-router";
import { Drawer } from "expo-router/drawer";
import * as SplashScreen from "expo-splash-screen";
import { StatusBar } from "expo-status-bar";
import { useEffect } from "react";
import "react-native-reanimated";
import { useColorScheme } from "@/hooks/useColorScheme";
import { selectCurrentUser } from "@/store/auth/authSlice";
import { useSelector } from "react-redux";
import "react-native-gesture-handler";
import { Provider } from "react-redux";
import store from "../store/store";

// Prevent the splash screen from auto-hiding before asset loading is complete.
SplashScreen.preventAutoHideAsync();

export default function RootLayout() {
  const currentUser = useSelector(selectCurrentUser);
  const colorScheme = useColorScheme();
  const [loaded] = useFonts({
    SpaceMono: require("../assets/fonts/SpaceMono-Regular.ttf"),
  });

  useEffect(() => {
    if (loaded) {
      SplashScreen.hideAsync();
    }
  }, [loaded]);

  if (!loaded) {
    return null;
  }

  return (

    <Provider store={store}>
      <ThemeProvider value={colorScheme === "dark" ? DarkTheme : DefaultTheme}>
        {currentUser ? (
          <Drawer>
            <Drawer.Screen name="(tabs)" options={{ headerShown: false }} />
            <Drawer.Screen name="+not-found" />
          </Drawer>
        ) : (
          <Stack>
            <Stack.Screen
              name="(authentication)"
              options={{ headerShown: false }}
            />
          </Stack>
        )}

        <StatusBar style="auto" />
      </ThemeProvider>
    </Provider>
  );
}

我尝试使用选择当前用户但出现此错误:找不到 react-redux 上下文值

react-native
  • 1 个回答
  • 11 Views
Martin Hope
agent_bean
Asked: 2025-01-07 07:44:14 +0800 CST

如何删除屏幕顶部的栏

  • 5

我已经开始学习 React Native。

我有一个简单的应用程序并开始添加导航。

我正在尝试创建一个游戏,并且想在屏幕之间导航。代码可以运行,但是应用程序顶部有一个栏。

App.js

import React from 'react';
import { NavigationContainer } from '@react-navigation/native'; // Only here
import { createStackNavigator } from '@react-navigation/stack';
import MenuScreen from './MenuScreen';
import GameScreen from './GameScreen';
import SettingsScreen from './SettingsScreen';

const Stack = createStackNavigator();

const App = () => {
  return (
      <Stack.Navigator initialRouteName="Menu">
        <Stack.Screen name="Menu" component={MenuScreen} />
        <Stack.Screen name="GameScreen" component={GameScreen} />
        <Stack.Screen name="SettingsScreen" component={SettingsScreen} />
      </Stack.Navigator>
  );
};

export default App;

菜单屏幕

import React from 'react';
import { View, Text, Button, StyleSheet } from 'react-native';

const MenuScreen = ({ navigation }) => {
  return (
    <View style={styles.container}>
      <Text style={styles.title}>Game Menu</Text>
      <Button title="Play" onPress={() => navigation.navigate('GameScreen')} />
      <Button title="Settings" onPress={() => navigation.navigate('SettingsScreen')} />
      <Button title="Exit" onPress={() => console.log('Exit Game')} />
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#282c34',
  },
  title: {
    fontSize: 30,
    color: '#ffffff',
    marginBottom: 20,
    fontWeight: 'bold',
  },
});

export default MenuScreen;

我该如何删除它?

如果不可能,我应该用什么来替代?

在此处输入图片描述

react-native
  • 1 个回答
  • 21 Views
Martin Hope
financial_physician
Asked: 2025-01-02 15:52:19 +0800 CST

模仿在圆边纸张上滚动

  • 5

我正在 React Native 中实现一个模态框,并希望创建一个独特的滚动效果,其中模态框具有圆角,可根据滚动位置动态调整。具体来说,我希望模态框看起来像一个可滚动的页面,两端都有圆角 - 查看内容顶部时,顶角应该是圆的;查看底部时,底角应该是圆的;滚动中间部分时,角应该是方形的。这会产生类似于通过窗口查看圆形卡片的效果,其中圆边仅在该部分可见时可见。目标是保持圆形卡片的视觉隐喻,同时提供滚动位置的清晰指示。

所以目前我有类似的东西:

<View style={{borderRadius: 8}}>
  <ScrollView>
     // ... some content
  </ScrollView>
</View>

它的角总是圆的,但如果只在顶部和底部圆,那就太酷了……这似乎可能是一个标准效果,但我以前没有做过太多的前端

react-native
  • 1 个回答
  • 22 Views
Martin Hope
Bruno Nobre
Asked: 2024-12-29 00:03:29 +0800 CST

当钩子代码中存在常数时,Axios 拦截器有时不起作用

  • 5

我有以下代码并且拦截器工作得很好:

import axios from 'axios';
import { useDispatch } from 'react-redux';

const axiosPrivate = axios.create({
    baseURL: 'http://localhost:8080'
});

export default useAxiosPrivate = () => {
    const dispatch = useDispatch();

    useEffect(() => {
        const responseIntercept = axiosPrivate.interceptors.response.use(
            response => response,
            async (error) => {
                const prevRequest = error?.config;
                if (error.response?.status === 401 && error.response.data?.code === 'AccessTokenExpired' && !prevRequest.sent) {
                    prevRequest.sent = true;
                    const { refreshToken } = await getData();
                    return axios.post('http://localhost:8080/auth/refresh-token', { refreshToken })
                        .then(async (_) => {
                            return axiosPrivate(prevRequest);
                        })
                        .catch(async (error) => {
                            dispatch(login({ name: '', id: '' }));
                            return Promise.reject(error);
                        });
                }
                return Promise.reject(error);
            }
        );

        return () => {
            axiosPrivate.interceptors.response.eject(responseIntercept);
        }
    }, [])

    return axiosPrivate;
}

然而,出于好奇,我尝试将 axiosPrivate 常量放置在组件代码中,如下所示:

export default useAxiosPrivate = () => {
    const axiosPrivate = axios.create({
        baseURL: 'localhost:8080'
    });

    const dispatch = useDispatch();
...}

执行此操作时,在某些组件中 useAxiosPrivate 钩子拦截器可以正常工作,而在其他组件中则无法正常工作,就好像它们不存在一样。

谁能告诉我为什么会出现这种现象?

react-native
  • 1 个回答
  • 16 Views
Martin Hope
Nejib Afdhal
Asked: 2024-12-25 19:38:18 +0800 CST

如何在 react-native 中通过 classname 使用 tailwind 动画?

  • 5

我尝试在我的 expo react-native 项目中使用 Tailwind 为视图或按钮等组件设置动画,但没有成功,此外,在网站文档中我注意到它支持动画和过渡强大的动画 - 通过 react-native-reanimated 完全支持 Tailwind 的动画类和自定义关键帧动画

🔄 过渡 - 样式状态之间的平滑过渡,包括暗模式变化和动态更新
https://www.nativewind.dev/

 <Button title='press' className="transition ease-in-out delay-150 bg-blue-500 hover:-translate-y-1 hover:scale-110 hover:bg-indigo-500 duration-300 ..."/>
react-native
  • 1 个回答
  • 20 Views
Martin Hope
Krzysztof Chabowski
Asked: 2024-12-20 20:08:06 +0800 CST

添加风格后,如何连接到 metro bundler?

  • 5

我遇到了一个问题,在为应用程序添加风格后,我无法让 React Native 应用程序连接到 metro 捆绑器。我搜索了很多可能的解决方案,但无法使其工作。当我使用通过 USB 连接的物理设备时会发生此问题。在添加风格之前,USB 调试已打开,一切正常。我需要使用物理设备来测试一些蓝牙功能。

这是我添加到我的 gradle 文件中的内容:

debuggableVariants = ["localDebug"]

flavorDimensions "default"
    productFlavors {
        local {
            resValue "string", "app_name", "Note Ninja (Debug)"
            applicationIdSuffix ".debug"
            versionNameSuffix "-debug"
            buildConfigField "String", "FLAVOR_NAME", "\"local\""
        }
        internal {
            resValue "string", "app_name", "Note Ninja (Internal Testing)"
            versionNameSuffix "-internal"
            buildConfigField "String", "FLAVOR_NAME", "\"internal\""
        }
        prod {
            resValue "string", "app_name", "Note Ninja"
            buildConfigField "String", "FLAVOR_NAME", "\"prod\""
        }
    }

现在我将我的 npm 脚本调整如下: "android:local": "react-native run-android --mode=localDebug --appId com.noteninja.debug",

当我运行此脚本时,metro 正在启动,并且应用程序已安装在手机上,但我收到错误消息“无法加载脚本。请确保您正在运行 Metro,或者该软件包‘index.android.bundle’已正确打包以供发布。当我单击重新加载时,我收到错误消息“无法连接到开发服务器”。

我尝试在手机浏览器中打开 localhost:8081,我可以访问 metro,所以这似乎不是防火墙问题。我尝试了 adb reverse tcp:8081 tcp:8081,但这也没有帮助(当我使用 adb devices 时,设备已连接,因为它已列出)。我卸载了应用程序,清除了 gradle 和 metro 缓存,但似乎没有任何帮助。

react-native
  • 1 个回答
  • 16 Views
Martin Hope
Umar Milanzi Snr
Asked: 2024-12-08 19:48:33 +0800 CST

博览会中的 Clerk Auth React Native 错误 - 缺少验证码令牌

  • 5

我以前用过 clerk 进行身份验证。但是今天出现的错误很奇怪。有人遇到过吗?

"status": 400,
"clerkError": true,
"errors": [
    {
      "code": "captcha_missing_token",
      "message": "Missing CAPTCHA token",
      "longMessage": "Missing CAPTCHA token",
      "meta": {}
    }
  ]
}

我已严格按照注册步骤操作,但遇到了这个错误

react-native
  • 1 个回答
  • 109 Views

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