React-Native/XCode 12.4/iOS 模拟器 - 应用启动时出现黑屏

Question

问题：

在成功构建且未记录任何错误后，应用会打开标准 LaunchScreen.storyboard，但随后会出现黑屏。 Metro Bundler 仍在加载，应用程序的代码进入登录屏幕，但黑屏仍然存在，应用程序对输入无响应。

我用什么：

• 硬件：iMac（Retina 5K，27 英寸，2015 年末）
• 操作系统：macOS BigSur 11.2.3
• 模拟器：iOS 模拟器 iPhone 12 (14.4)
• 测试手机：iPhone 7 (14.4)
• XCode 版本 12.4 (12D4e)

相关包：

"react": "17.0.1",
"react-native": "0.64.0",
"@react-navigation/bottom-tabs": "^5.11.8",
"@react-navigation/drawer": "^5.12.4",
"@react-navigation/material-bottom-tabs": "^5.3.14",
"@react-navigation/native": "^5.9.3",
"@react-navigation/stack": "^5.14.3",
"react-native-gesture-handler": "^1.10.3",
"react-native-screens": "^2.18.1",
"react-native-safe-area-context": "^3.2.0",
"react-native-material-dropdown": "^0.11.1",
"react-native-appearance": "^0.3.4",

AppleDelegate.m

#import "AppDelegate.h"

#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#import <Firebase.h>

#ifdef FB_SONARKIT_ENABLED
#import <FlipperKit/FlipperClient.h>
#import <FlipperKitLayoutPlugin/FlipperKitLayoutPlugin.h>
#import <FlipperKitUserDefaultsPlugin/FKUserDefaultsPlugin.h>
#import <FlipperKitNetworkPlugin/FlipperKitNetworkPlugin.h>
#import <SKIOSNetworkPlugin/SKIOSNetworkAdapter.h>
#import <FlipperKitReactPlugin/FlipperKitReactPlugin.h>

static void InitializeFlipper(UIApplication *application) {
  FlipperClient *client = [FlipperClient sharedClient];
  SKDescriptorMapper *layoutDescriptorMapper = [[SKDescriptorMapper alloc] initWithDefaults];
  [client addPlugin:[[FlipperKitLayoutPlugin alloc] initWithRootNode:application withDescriptorMapper:layoutDescriptorMapper]];
  [client addPlugin:[[FKUserDefaultsPlugin alloc] initWithSuiteName:nil]];
  [client addPlugin:[FlipperKitReactPlugin new]];
  [client addPlugin:[[FlipperKitNetworkPlugin alloc] initWithNetworkAdapter:[SKIOSNetworkAdapter new]]];
  [client start];
}
#endif



@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  
  if ([FIRApp defaultApp] == nil) {
     [FIRApp configure];
   }
  
#ifdef FB_SONARKIT_ENABLED
  InitializeFlipper(application);
#endif

  RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
  RCTRootView *rootView = [[RCTRootView alloc] initWithBridge:bridge
                                                   moduleName:@"MyProject"
                                            initialProperties:nil];

  if (@available(iOS 13.0, *)) {
      rootView.backgroundColor = [UIColor blackColor];
  } else {
      rootView.backgroundColor = [UIColor whiteColor];
  }

  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  UIViewController *rootViewController = [UIViewController new];
  rootViewController.view = rootView;
  self.window.rootViewController = rootViewController;
  [self.window makeKeyAndVisible];
  return YES;
}

- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
{
#if DEBUG
  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
#else
  return [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
#endif
}

@end

索引.js

import App from './App';
import { name as appName } from './app.json';
import AsyncStorage from '@react-native-community/async-storage';

import { AppRegistry, Platform } from 'react-native';
import { gestureHandlerRootHOC } from 'react-native-gesture-handler';

AppRegistry.registerComponent(appName, () => gestureHandlerRootHOC(App));

App.js

import React, { useState, useEffect } from 'react';
import { Root } from 'native-base';
import { AppearanceProvider } from 'react-native-appearance';

import AppContainer from './AppContainer.js'

export default App = () => {
return(
    <Root> 
      <AppearanceProvider>
        <AppContainer />
      </AppearanceProvider>
    </Root>
  )
}

AppContainer.js

import { NavigationContainer, useNavigation } from "@react-navigation/native";

const AppContainer = () => {

    const { store, actions } = useContext(Context)


    const routeNameRef = useRef();
    const navigationRef = useRef();
    
    return(
        <NavigationContainer
            ref={navigationRef}
            onReady={() => routeNameRef.current = navigationRef.current.getCurrentRoute().name}
            onStateChange={() => {
                const previousRouteName = routeNameRef.current;
                const currentRouteName = navigationRef.current.getCurrentRoute().name
                actions.navigate.currentPage(currentRouteName)
                // Save the current route name for later comparision
                routeNameRef.current = currentRouteName;
        }}>
        <NavContainer />  // ALL PAGES HERE, STARTS WITH SPALH PAGE
        </NavigationContainer>
    )
}

export default Store(AppContainer);

我的尝试：

1.程序化导航在后台运行 => 仍然黑屏且无响应

尽管我只看到黑屏，但我的控制台日志显示 react-navigation 正在运行。首先，SPALSH 页面打开，然后进入 LOGIN 页面，如下所示。

终端控制台日志：

 WARN  AsyncStorage has been extracted from react-native core and will be removed in a future release. It can now be installed and imported from '@react-native-async-storage/async-storage' instead of 'react-native'. See https://github.com/react-native-async-storage/async-storage
 LOG  Running "MyProject" with {"rootTag":11,"initialProps":{}}
 LOG  You are now in the SPLASH PAGE
 LOG  Null User Token
 LOG  You are now in the LOGIN PAGE
 LOG  You are now in the LOGIN PAGE

XCode 调试日志：

The default Firebase app has not yet been configured. Add `[FIRApp configure];` (`FirebaseApp.configure()` in Swift) to your application initialization. 
 7.9.0 - [Firebase/Core][I-COR000008] The project's Bundle ID is inconsistent with either the Bundle ID in 'GoogleService-Info.plist', or the Bundle ID in the options if you are using a customized options. To ensure that everything can be configured correctly, you may need to make the Bundle IDs consistent. To continue with this plist file, you may change your app's bundle identifier to 'MyProject'. Or you can download a new configuration file that matches your bundle identifier from https://console.firebase.google.com/ and replace the current one.
[Firebase/Analytics][I-ACS023007] Analytics v.7.9.0 started
[Firebase/Analytics][I-ACS023008] To enable debug logging set the following application argument: -FIRAnalyticsDebugEnabled
Firebase/Messaging][I-FCM001000] FIRMessaging Remote Notifications proxy enabled, will swizzle remote notification receiver handlers. If you'd prefer to manually integrate Firebase Messaging, add "FirebaseAppDelegateProxyEnabled" to your Info.plist, and set it to NO. Follow the instructions at:
https://firebase.google.com/docs/cloud-messaging/ios/client#method_swizzling_in_firebase_messaging
to ensure proper integration.
flipper: FlipperClient::addPlugin Inspector
flipper: FlipperClient::addPlugin Preferences
flipper: FlipperClient::addPlugin React
flipper: FlipperClient::addPlugin Network
  nw_protocol_get_quic_image_block_invoke dlopen libquic failed
 [native] Running application MyProject ({
    initialProps =     {
    };
    rootTag = 1;
})
 [native] RCTBridge required dispatch_sync to load RCTDevLoadingView. This may lead to deadlocks
  [Firebase/Analytics][I-ACS800023] No pending snapshot to activate. SDK name: app_measurement
  [Firebase/Analytics][I-ACS023012] Analytics collection enabled
 [Firebase/Analytics][I-ACS023220] Analytics screen reporting is enabled. Call +[FIRAnalytics logEventWithName:FIREventScreenView parameters:] to log a screen view event. To disable automatic screen reporting, set the flag FirebaseAutomaticScreenReportingEnabled to NO (boolean) in the Info.plist
 [javascript] AsyncStorage has been extracted from react-native core and will be removed in a future release. It can now be installed and imported from '@react-native-async-storage/async-storage' instead of 'react-native'. See https://github.com/react-native-async-storage/async-storage
 [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600002826e60> F8BB1C28-BAE8-11D6-9C31-00039315CD46
 [connection] nw_socket_handle_socket_event [C5.1:1] Socket SO_ERROR [61: Connection refused]
 [connection] nw_socket_handle_socket_event [C5.2:1] Socket SO_ERROR [61: Connection refused]
 [connection] nw_connection_get_connected_socket [C5] Client called nw_connection_get_connected_socket on unconnected nw_connection
 TCP Conn 0x60000183cb00 Failed : error 0:61 [61]
 [javascript] Running "MyProject" with {"rootTag":1,"initialProps":{}}
 [javascript] RCTBridge required dispatch_sync to load RCTDevLoadingView. This may lead to deadlocks
 [native] [GESTURE HANDLER] Initialize gesture handler for root view <RCTRootContentView: 0x7fb622c0f680; reactTag: 1; frame = (0 0; 0 0); gestureRecognizers = <NSArray: 0x60000214e3a0>; layer = <CALayer: 0x600002f8aca0>>
[native] Manifest does not exist - creating a new one.

(null)
 [javascript] You are now in the SPLASH PAGE
 [javascript] You are now in the LOGIN PAGE
 [javascript] You are now in the LOGIN PAGE

2。从新项目开始 => 白屏和错误

我试图通过从 react-native 网站创建一个新的 react-native 项目来解决这个问题......只是现在，我得到一个白屏和一些错误。 （见下文）

地铁控制台：

Invariant Violation: Native module cannot be null.
 ERROR  Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication). A frequent cause of the error is that the application entry file path is incorrect. 
      This can also happen when the JS bundle is corrupt or there is an early initialization error when loading React Native.
 ERROR  Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication). A frequent cause of the error is that the application entry file path is incorrect. 
      This can also happen when the JS bundle is corrupt or there is an early initialization error when loading React Native.

XCode 控制台：

flipper: FlipperClient::addPlugin Inspector
flipper: FlipperClient::addPlugin Preferences
flipper: FlipperClient::addPlugin React
flipper: FlipperClient::addPlugin Network
nw_protocol_get_quic_image_block_invoke dlopen libquic failed
 [native] Running application MyTestApp ({
    initialProps =     {
    };
    rootTag = 1;
})
[javascript] Invariant Violation: Native module cannot be null.
 [connection]  Socket SO_ERROR [61: Connection refused]
[javascript] Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication). A frequent cause of the error is that the application entry file path is incorrect. 
      This can also happen when the JS bundle is corrupt or there is an early initialization error when loading React Native.
[connection] nw_socket_handle_socket_event [C5.2:1] Socket SO_ERROR [61: Connection refused]
[connection] nw_connection_get_connected_socket [C5] Client called nw_connection_get_connected_socket on unconnected nw_connection
TCP Conn 0x6000005c4160 Failed : error 0:61 [61]
[native] Running surface LogBox ({
    initialProps =     {
    };
    rootTag = 11;
})
[javascript] Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication). A frequent cause of the error is that the application entry file path is incorrect. 
      This can also happen when the JS bundle is corrupt or there is an early initialization error when loading React Native.
[native] Failed to mount LogBox within 1s

我不知道如何在这个问题上取得进展。

Answer 1

最后，我不得不从 GitHub 存储库下载该项目的早期版本。一切正常。

如果我要使用更新的 npm 包复制一个项目，我需要在 React-Native 网站上构建最新的 vanilla 版本。 （而不仅仅是复制和粘贴文件，

我个人的教训是不要固执地让我能在一周内解决问题。保持内省的观点，并依靠我所知道的有效方法。