#import <Foundation/Foundation.h>
 #import "RCTBridgeModule.h"
 @interface SplashScreen : NSObject<RCTBridgeModule>

 @end

#import "SplashScreen.h"
 @implementation SplashScreen

 RCT_EXPORT_MODULE();

 RCT_EXPORT_METHOD(close){
 [[NSNotificationCenter defaultCenter] postNotificationName:@"Notification_CLOSE_SPLASH_SCREEN" object:nil];
 }
 @end

@interface AppDelegate ()
 {
 UIImageView *splashImage;
 }
 @end

 @implementation AppDelegate

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
 [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(closeSplashImage) name:"Notification_CLOSE_SPLASH_SCREEN" object:nil];

 ...
 [self autoSplashScreen];//寫在 return YES 之前，其他代碼之后
 return YES;
 }
 -(void)autoSplashScreen {
 if (!splashImage) {
 splashImage = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];
 }
 if (IPHONESCREEN3p5) {
 [splashImage setImage:[UIImage imageNamed:@"launch4"]];
 }else if (IPHONESCREEN4){
 [splashImage setImage:[UIImage imageNamed:@"launch5"]];
 }else if (IPHONESCREEN4p7){
 [splashImage setImage:[UIImage imageNamed:@"launch6"]];
 }else if (IPHONESCREEN5p5){
 [splashImage setImage:[UIImage imageNamed:@"launch7"]];
 }
 [self.window addSubview:splashImage];
 }
 -(void)closeSplashImage {
 dispatch_sync(dispatch_get_main_queue(), ^{
 [UIView animateWithDuration:0.5 animations:^{
 splashImage.alpha = 0;
 } completion:^(BOOL finished){
 [splashImage removeFromSuperview];
 }];
 });
 }

if (Platform.OS === 'ios') {
 NativeModules.SplashScreen.close();
 };