Ios 处理多个推送通知时出错

当屏幕打开时，我通过自动推送到detailViewController来处理推送通知。当有一个或两个推送通知时，它可以正常工作，因为我可以将每个detailViewController推到彼此的顶部，然后将其弹出。但是，当我必须弹出两个以上的DetailViewController时，应用程序会崩溃。它只在iOS 7+中发生。

设置通知Id

- (void)application:(UIApplication *)app didReceiveRemoteNotification:(NSDictionary *)userInfo
{
   if(app.applicationIconBadgeNumber!=0)
   {
        app.applicationIconBadgeNumber = app.applicationIconBadgeNumber - 1;
    }

    NSString *aps =[NSString stringWithFormat:@"%@",[userInfo objectForKey:@"id"]];


    if (app.applicationState == UIApplicationStateActive)
    {
        NSDictionary *dict = [NSDictionary dictionaryWithObjects:@[[[userInfo objectForKey:@"aps"] objectForKey:@"alert"]] forKeys:@[@"notifyText"]];
        [arrNotificationData addObject:dict];
        [self showNotificationInActiveMode:[[userInfo objectForKey:@"aps"] objectForKey:@"alert"]];
    }


   if ([aps isEqualToString:@"1"])
    {
        [UserDefault setpushnotificationid:[aps intValue]];       
    }
    if ([aps isEqualToString:@"2"])
    {
        [UserDefault setpushnotificationid:[aps intValue]];
    }
    if ([aps isEqualToString:@"3"])
    {
        [UserDefault setpushnotificationid:[aps intValue]];
    }
    if ([aps isEqualToString:@"4"])
    {
        [UserDefault setpushnotificationid:[aps intValue]];
    }if ([aps isEqualToString:@"5"])
    {
        [UserDefault setpushnotificationid:[aps intValue]];
    }


}

使用singleton类作为基类，检查ID和推送并弹出视图

@interface CustomViewController ()

@end

@implementation CustomViewController
- (void)viewDidLoad
{
    [super viewDidLoad];

[[NSNotificationCenter defaultCenter]addObserver:self
                                            selector:@selector(appBecomeActive)
                                                name:UIApplicationDidBecomeActiveNotification
                                              object:nil];
}

-(void)appBecomeActive
{

    int val=[UserDefault getpushnotificationid];
    if(val!=0){

        [self checkforpushnotification];
    }
}


-(void)checkforpushnotification
{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    int val=[UserDefault getpushnotificationid];
    [UserDefault setpushnotificationid:0];


    //.: if current view is profile or setting just dismiss it.because they are present

    switch (val)
    {
        case 1:
        {
            if( [self checkIfControllerExist:[DealsViewController class]])
            {
                return;
            }else{
                detailViewController *VC = (detailViewController *)[storyboard instantiateViewControllerWithIdentifier:@"VCView"];
                [self.navigationController pushViewController:VC animated:YES];
            }
        }
            break;
}
}

现在在课堂上使用bace类

@interface detailViewController : CustomViewController