delBody.m

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken {
    const unsigned *tokenBytes = [deviceToken bytes];
    NSString *tokenAsString = [NSString stringWithFormat:@"%08x%08x%08x%08x%08x%08x%08x%08x",
    ntohl(tokenBytes[0]), ntohl(tokenBytes[1]), ntohl(tokenBytes[2]),
    ntohl(tokenBytes[3]), ntohl(tokenBytes[4]), ntohl(tokenBytes[5]),
    ntohl(tokenBytes[6]), ntohl(tokenBytes[7])];
    JAVA_OBJECT str = fromNSString(CN1_THREAD_GET_STATE_PASS_ARG tokenAsString);
    your_namespace_MainClass_iosPushRegistered___java_lang_String(CN1_THREAD_GET_STATE_PASS_ARG str);
}
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error { 
  JAVA_OBJECT str = fromNSString(CN1_THREAD_GET_STATE_PASS_ARG @"error");
  your_namespace_MainClass_iosPushRegistered___java_lang_String(CN1_THREAD_GET_STATE_PASS_ARG str);
}
NSMutableArray *repliedNotifAcks = nil;
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
    NSString *metaInfo = [userInfo valueForKey:@"meta"];
    NSData *data = [metaInfo dataUsingEncoding:NSUTF8StringEncoding];
    id metaJson = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
    NSString *notifId = [metaJson valueForKey:@"notifId"];
    NSString *senderId = [metaJson valueForKey:@"senderId"];
    UIApplicationState state = [[UIApplication sharedApplication] applicationState];
    if(state == UIApplicationStateActive)
    {
        completionHandler(UIBackgroundFetchResultNoData);
        JAVA_OBJECT strNotifId = fromNSString(CN1_THREAD_GET_STATE_PASS_ARG notifId);
        JAVA_OBJECT strSenderId = fromNSString(CN1_THREAD_GET_STATE_PASS_ARG senderId);
        your_namespace_MainClass_iosActivePushReceived___java_lang_String_java_lang_String(CN1_THREAD_GET_STATE_PASS_ARG strNotifId, strSenderId);
    }
    else
    {
        BOOL firstBG = YES;
        __block UIBackgroundTaskIdentifier bgTask = UIBackgroundTaskInvalid;
        bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
            [[UIApplication sharedApplication] endBackgroundTask:bgTask];
            bgTask = UIBackgroundTaskInvalid;
        }];
        if(![repliedNotifAcks containsObject:notifId])
        {
            [repliedNotifAcks addObject:notifId];
            [self Fetchdata:notifId:senderId];
        }else
            firstBG = NO;
        [[UIApplication sharedApplication] endBackgroundTask:(UIBackgroundTaskIdentifier)bgTask];
        bgTask = UIBackgroundTaskInvalid;
        completionHandler(UIBackgroundFetchResultNewData);
        if((firstBG && state == UIApplicationStateInactive) || !firstBG)
        {
            JAVA_OBJECT str = fromNSString(CN1_THREAD_GET_STATE_PASS_ARG notifId);
            your_namespace_MainClass_iosPushReceived___java_lang_String(CN1_THREAD_GET_STATE_PASS_ARG str);
        }
    }
}
-(void)Fetchdata:(NSString*)notifId:(NSString*)senderId
{
    NSURLSessionConfiguration *defaultSessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
    NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration:defaultSessionConfiguration];
    NSURL *url = [NSURL URLWithString:@"https://www.yourServer.com/endpoint"];
    NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
    NSString *postParams = [NSString stringWithFormat:@"%@%@%@%@%@", @"{\"notifId\":\"", notifId, @"\",\"senderId\":\"",senderId,@"\"}"];
    NSData *postData = [postParams dataUsingEncoding:NSUTF8StringEncoding];
    [urlRequest setHTTPMethod:@"POST"];
    [urlRequest setHTTPBody:postData];
    NSURLSessionDataTask *dataTask = [defaultSession dataTaskWithRequest:urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    }];
    [dataTask resume];
}