react-native-navigation/ios/RNNSplashScreen.m

#import "RNNSplashScreen.h"
#import <UIKit/UIKit.h>

@implementation RNNSplashScreen

-(void)showSplashScreen
{
    CGRect screenBounds = [UIScreen mainScreen].bounds;
    UIView *splashView = nil;
    
    NSString* launchStoryBoard = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UILaunchStoryboardName"];
    if (launchStoryBoard != nil)
    {//load the splash from the storyboard that's defined in the info.plist as the LaunchScreen
        @try
        {
            splashView = [[NSBundle mainBundle] loadNibNamed:launchStoryBoard owner:self options:nil][0];
            if (splashView != nil)
            {
                splashView.frame = CGRectMake(0, 0, screenBounds.size.width, screenBounds.size.height);
            }
        }
        @catch(NSException *e)
        {
            splashView = nil;
        }
    }
    else
    {//load the splash from the DEfault image or from LaunchImage in the xcassets
        CGFloat screenHeight = screenBounds.size.height;
        
        NSString* imageName = @"Default";
        if (screenHeight == 568)
            imageName = [imageName stringByAppendingString:@"-568h"];
        else if (screenHeight == 667)
            imageName = [imageName stringByAppendingString:@"-667h"];
        else if (screenHeight == 736)
            imageName = [imageName stringByAppendingString:@"-736h"];
        
        //xcassets LaunchImage files
        UIImage *image = [UIImage imageNamed:imageName];
        if (image == nil)
        {
            imageName = @"LaunchImage";
            
            if (screenHeight == 480)
                imageName = [imageName stringByAppendingString:@"-700"];
            if (screenHeight == 568)
                imageName = [imageName stringByAppendingString:@"-700-568h"];
            else if (screenHeight == 667)
                imageName = [imageName stringByAppendingString:@"-800-667h"];
            else if (screenHeight == 736)
                imageName = [imageName stringByAppendingString:@"-800-Portrait-736h"];
            
            image = [UIImage imageNamed:imageName];
        }
        
        if (image != nil)
        {
            splashView = [[UIImageView alloc] initWithImage:image];
        }
    }
    
    if (splashView != nil)
    {
        UIViewController *splashVC = [[UIViewController alloc] init];
        splashVC.view = splashView;
        
        id<UIApplicationDelegate> appDelegate = [UIApplication sharedApplication].delegate;
        appDelegate.window.rootViewController = splashVC;
        [appDelegate.window makeKeyAndVisible];
    }
    
}

@end