我是本机反应的新手，我需要应用程序上的功能。 我已经使用与nvm一起安装的npm安装了expo和react-native，所以不会遇到拒绝权限的问题。
我使用expo运行该应用程序，可以看到第一页，即登录页面，但是一旦按登录，就会出现以下错误：
TypeError: TypeError: undefined is not an object (evaluating 'theme.label')
This error is located at:
in HeaderTitle (at Header.tsx:220)
in RCTView (at View.js:44)
in AnimatedComponent (at Header.tsx:531)
in RCTView (at View.js:44)
in RCTView (at View.js:44)
in RCTView (at View.js:44)
in AnimatedComponent (at react-native-safe-area-view/index.js:163)
in SafeView (at withOrientation.js:54)
in withOrientation (at Header.tsx:722)
in RCTView (at View.js:44)
in AnimatedComponent (at Header.tsx:714)
in Header (at withOrientation.js:30)
in withOrientation (at StackViewLayout.tsx:227)
in RCTView (at View.js:44)
in RCTView (at View.js:44)
in AnimatedComponent (at StackViewCard.tsx:106)
in RCTView (at View.js:44)
in AnimatedComponent (at screens.native.js:59)
in Screen (at StackViewCard.tsx:93)
in Card (at createPointerEventsContainer.tsx:95)
in Container (at StackViewLayout.tsx:982)
in RCTView (at View.js:44)
in ScreenContainer (at StackViewLayout.tsx:394)
in RCTView (at View.js:44)
in AnimatedComponent (at StackViewLayout.tsx:384)
in Handler (at StackViewLayout.tsx:377)
in StackViewLayout (at withOrientation.js:30)
in withOrientation (at StackView.tsx:103)
in RCTView (at View.js:44)
in Transitioner (at StackView.tsx:40)
in StackView (at createNavigator.js:81)
in Navigator (at createKeyboardAwareNavigator.js:12)
in KeyboardAwareNavigator (at SceneView.js:9)
in SceneView (at StackViewLayout.tsx:910)
in RCTView (at View.js:44)
in AnimatedComponent (at StackViewCard.tsx:106)
in RCTView (at View.js:44)
in AnimatedComponent (at screens.native.js:59)
in Screen (at StackViewCard.tsx:93)
in Card (at createPointerEventsContainer.tsx:95)
in Container (at StackViewLayout.tsx:982)
in RCTView (at View.js:44)
in ScreenContainer (at StackViewLayout.tsx:394)
in RCTView (at View.js:44)
in AnimatedComponent (at StackViewLayout.tsx:384)
in Handler (at StackViewLayout.tsx:377)
in StackViewLayout (at withOrientation.js:30)
in withOrientation (at StackView.tsx:103)
in RCTView (at View.js:44)
in Transitioner (at StackView.tsx:40)
in StackView (at createNavigator.js:81)
in Navigator (at createKeyboardAwareNavigator.js:12)
in KeyboardAwareNavigator (at SceneView.js:9)
in SceneView (at SwitchView.js:12)
in SwitchView (at createNavigator.js:81)
in Navigator (at createAppContainer.js:430)
in NavigationContainer (at App.tsx:31)
in RCTView (at View.js:44)
in App (at withExpoRoot.js:22)
in RootErrorBoundary (at withExpoRoot.js:21)
in ExpoRootComponent (at renderApplication.js:34)
in RCTView (at View.js:44)
in RCTView (at View.js:44)
in AppContainer (at renderApplication.js:33)
This error is located at:
in NavigationContainer (at App.tsx:31)
in RCTView (at View.js:44)
in App (at withExpoRoot.js:22)
in RootErrorBoundary (at withExpoRoot.js:21)
in ExpoRootComponent (at renderApplication.js:34)
in RCTView (at View.js:44)
in RCTView (at View.js:44)
in AppContainer (at renderApplication.js:33)
- node_modules/react-navigation-stack/lib/module/views/Header/HeaderTitle.js:1:2119 in render
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:10563:21 in finishClassComponent
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:14091:21 in performUnitOfWork
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:14129:41 in workLoop
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:14226:15 in renderRoot
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:15193:17 in performWorkOnRoot
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:15090:24 in performWork
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:15047:14 in performSyncWork
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:14925:19 in requestWork
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:14711:16 in scheduleWork
- node_modules/react-native/Libraries/Renderer/oss/ReactNativeRenderer-dev.js:7700:17 in enqueueSetState
- node_modules/react/cjs/react.development.js:364:31 in setState
- node_modules/@react-navigation/native/src/createAppContainer.js:377:22 in dispatch
- node_modules/@react-navigation/core/lib/module/getChildNavigation.js:1:1529 in <unknown>
* screens/auth/SignInScreen.tsx:38:41 in <unknown>
- node_modules/promise/setimmediate/core.js:37:14 in tryCallOne
- node_modules/promise/setimmediate/core.js:123:25 in <unknown>
- node_modules/react-native/Libraries/Core/Timers/JSTimers.js:152:14 in _callTimer
- node_modules/react-native/Libraries/Core/Timers/JSTimers.js:200:17 in _callImmediatesPass
- node_modules/react-native/Libraries/Core/Timers/JSTimers.js:464:30 in callImmediates
* [native code]:null in callImmediates
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:320:6 in __callImmediates
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:135:6 in <unknown>
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:297:10 in __guard
- node_modules/react-native/Libraries/BatchedBridge/MessageQueue.js:134:17 in flushedQueue
* [native code]:null in flushedQueue
* [native code]:null in invokeCallbackAndReturnFlushedQueue
这是package.json
{
"main": "node_modules/expo/AppEntry.js",
"scripts": {
"start": "expo start",
"run:android": "expo start --android",
"run:ios": "expo start --ios",
"build:android": "expo build:android",
"build:ios": "expo build:ios"
},
"jest": {
"preset": "jest-expo"
},
"dependencies": {
"@expo/vector-icons": "^10.0.5",
"@types/expo": "^32.0.0",
"@types/nanoid": "^2.0.0",
"@types/react-native": "^0.57.0",
"@types/react-native-dialog": "^5.5.0",
"@types/react-native-snap-carousel": "^3.7.2",
"@types/react-navigation": "^3.0.7",
"@types/yup": "^0.26.13",
"axios": "^0.18.0",
"expo": "^32.0.0",
"formik": "^1.5.7",
"nanoid": "^2.0.3",
"react": "16.5.0",
"react-native": "https://github.com/expo/react-native/archive/sdk-32.0.0.tar.gz",
"react-native-circular-progress": "https://github.com/myuser/react-native-circular-progress.git",
"react-native-dialog": "^5.6.0",
"react-native-modal-popover": "^0.0.12",
"react-native-snap-carousel": "^3.8.0",
"react-navigation": "^3.0.9",
"typescript": "^3.3.0",
"yup": "^0.27.0"
},
"devDependencies": {
"@react-native-community/eslint-config": "^0.0.5",
"babel-preset-expo": "^5.0.0",
"eslint": "^5.16.0",
"eslint-config-prettier": "^4.3.0",
"eslint-plugin-prettier": "^3.1.0",
"prettier": "^1.17.1"
},
"private": true
}
你能帮我吗？