在启动屏幕加载iOS之前反应本机黑屏

Question

我试图通过许多Stackoverflow问题和Github问题解决此问题，但均无济于事，所以我寻求帮助。

我创建了一个弹出（来自expo）的本机应用程序。我已经手动生成并通过expo的自动启动屏幕安装生成了启动屏幕。通过XCode正确链接了SplashScreen（通过选择SplashScreen.storyboard文件作为LaunchScreen）。 在iOS上通过TestFlight打开应用程序时，加载的第一个屏幕是黑屏。大约半秒钟后，我的SplashScreen显示出来。我不确定为什么会发生这种情况，我已尝试在删除应用程序后重新安装该应用程序，在存档前清理构建文件夹，删除情节提要文件并重新实现它，但似乎无济于事。如果出现问题，我将在下面发布我的AppDelegate文件。任何建议都将不胜感激。

sudo docker exec -it rest bash

#import "AppDelegate.h"

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

#import <UMCore/UMModuleRegistry.h>
#import <UMReactNativeAdapter/UMNativeModulesProxy.h>
#import <UMReactNativeAdapter/UMModuleRegistryAdapter.h>
#import <EXSplashScreen/EXSplashScreenService.h>
#import <UMCore/UMModuleRegistryProvider.h>
#import <EXScreenOrientation/EXScreenOrientationViewController.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

@interface AppDelegate () <RCTBridgeDelegate>

@property (nonatomic, strong) UMModuleRegistryAdapter *moduleRegistryAdapter;
@property (nonatomic, strong) NSDictionary *launchOptions;

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
#ifdef FB_SONARKIT_ENABLED
  InitializeFlipper(application);
#endif
  
  self.moduleRegistryAdapter = [[UMModuleRegistryAdapter alloc] initWithModuleRegistryProvider:[[UMModuleRegistryProvider alloc] init]];
  self.launchOptions = launchOptions;
  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  #ifdef DEBUG
    [self initializeReactNativeApp];
  #else
    EXUpdatesAppController *controller = [EXUpdatesAppController sharedInstance];
    controller.delegate = self;
    [controller startAndShowLaunchScreen:self.window];
  #endif

  [super application:application didFinishLaunchingWithOptions:launchOptions];

  return YES;
}

- (RCTBridge *)initializeReactNativeApp
{
  RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:self.launchOptions];
  RCTRootView *rootView = [[RCTRootView alloc] initWithBridge:bridge moduleName:@"main" initialProperties:nil];
  rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  UIViewController *rootViewController = [[EXScreenOrientationViewController alloc] init];
  rootViewController.view = rootView;
  self.window.rootViewController = rootViewController;
  [self.window makeKeyAndVisible];

  return bridge;
 }

- (NSArray<id<RCTBridgeModule>> *)extraModulesForBridge:(RCTBridge *)bridge
{
  NSArray<id<RCTBridgeModule>> *extraModules = [_moduleRegistryAdapter extraModulesForBridge:bridge];
  // If you'd like to export some custom RCTBridgeModules that are not Expo modules, add them here!
  return extraModules;
}

- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge {
 #ifdef DEBUG
  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
 #else
  return [[EXUpdatesAppController sharedInstance] launchAssetUrl];
 #endif
}

- (void)appController:(EXUpdatesAppController *)appController didStartWithSuccess:(BOOL)success {
  appController.bridge = [self initializeReactNativeApp];
  EXSplashScreenService *splashScreenService = (EXSplashScreenService *)[UMModuleRegistryProvider getSingletonModuleForClass:[EXSplashScreenService class]];
  [splashScreenService showSplashScreenFor:self.window.rootViewController];
}

@end

Answer 1

在XCode 12.0和iOS 14上，请尝试以下步骤。

如果没有，创建一个LaunchScreen.storyboard。

设计视图，像这样

并将ViewController的故事板ID更新为LaunchViewController

使用以下代码更新AppDelegate.m的didFinishLaunchingWithOptions

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
....
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"LaunchScreen" bundle:[NSBundle mainBundle]];
  UIViewController *launchScrenViewController = [storyboard instantiateViewControllerWithIdentifier:@"LaunchViewController"];

  launchScrenViewController.view.frame = self.window.bounds;
  rootView.loadingView = launchScrenViewController.view;
..
return YES;
}

选择启动屏幕作为主界面，然后选择Xcode中的启动屏幕。这是一个例子

这应该可以解决您的问题。