React native and onesignal notification problem - ios

Question

Hi firstly I learning react-native and I use onesignal for notification everything awesome but
sometimes iphone 6s hasnt token one signal error is 'Apns Delegate Never Fired' but 6 plus alwasy has a token and background notification very nice. If the application is open while sending a notification, the notification does not occur above. It occurs on a dialog screen.
/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
#import "AppDelegate.h"
#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
RCTRootView *rootView = [[RCTRootView alloc] initWithBridge:bridge
moduleName:#"doyurunbenicomproje"
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 = [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

Answer 1

check your os version between on 6s and 6plus.
If the app is foreground,notification will show on your screen, if the app is background,notification will show above.
EDIT
add this code to your AppDelegate.m
(void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
NSLog(#"didFailToRegisterForRemoteNotificationsWithError %#", error);
}

Answer 2

kOSSettingsKeyInFocusDisplayOption=2 I aded this code and notifications will display as normal notifications.