How to pass global variable value from objective c to react native - ios

Question

we have create a bridge react native to native for send location.
we use react RCT_EXPORT_METHOD for callback.
we create a object c global variable "coordinate" to store our location value and send to callback method
when call RCT_EXPORT_METHOD for callback our global variable "coordinate" show null in RCT_EXPORT_METHOD
Also we append static value in callback they send value to react native
RCT_EXPORT_METHOD(findEvents:(RCTResponseSenderBlock)callback )
{
callback(#[#"Test"]);
}
how to pass global variable value in callback or any other way to send my location data to react native
My .m file code:
#import "AppDelegate.h"
#import <React/RCTBridge.h>
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#import <Firebase.h>
#implementation AppDelegate{
RCTRootView *rootView;
NSMutableDictionary *coordinate;
}
RCT_EXPORT_MODULE();
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary
*)launchOptions
{
RCTBridge *bridge = [[RCTBridge alloc] initWithDelegate:self launchOptions:launchOptions];
rootView = [[RCTRootView alloc] initWithBridge:bridge
moduleName:#"OHCSMobile1"
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];
if ([FIRApp defaultApp] == nil) {
[FIRApp configure];
}
self.manager = [[APScheduledLocationManager alloc] initWithDelegate:self];
return YES;
}
- (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
{
#if DEBUG
return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:#"index"
fallbackResource:nil];
#else
return [[NSBundle mainBundle] URLForResource:#"main" withExtension:#"jsbundle"];
#endif
}
-(void)scheduledLocationManager:(APScheduledLocationManager *)manager didFailWithError:
(NSError *)error{
NSLog(#"error");
}
-(void)scheduledLocationManager:(APScheduledLocationManager *)manager didUpdateLocations:
(NSArray<CLLocation *> *)locations{
NSLog(#"locations");
CLLocation * location = locations[0];
double latitute = location.coordinate.latitude;
double longitute = location.coordinate.longitude;
coordinate = [[NSMutableDictionary alloc] init];
[coordinate setValue:[NSNumber numberWithDouble: latitute] forKey:#"LAT"];
[coordinate setValue:[NSNumber numberWithDouble: longitute] forKey:#"LONG"];
NSLog(#"%#oordinate", coordinate);
}
-(void)scheduledLocationManager:(APScheduledLocationManager *)manager
didChangeAuthorization:
(CLAuthorizationStatus)status{
NSLog(#"Authorization");
if (status == kCLAuthorizationStatusAuthorizedAlways || status ==
kCLAuthorizationStatusAuthorizedWhenInUse) {
// The user accepted authorization
[self.manager startUpdatingLocationWithInterval:30 acceptableLocationAccuracy:100];
}
}
RCT_EXPORT_METHOD(findEvents:(RCTResponseSenderBlock)callback )
{
if(coordinate != nil){
callback(#[coordinate]);
}else{
callback(#[#"null"]);
}
}
#end
PLease Help