Question

I’ve got a question regarding displaying local notification reminders inside the application. I think the problem lies with the view controller.

here’s the code I have so far:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    UIViewController *viewController1, *viewController2;
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        viewController1 = [[Number1ViewController alloc] initWithNibName:@"Number1ViewController_iPhone" bundle:nil];
        viewController2 = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iPhone" bundle:nil];
    } else {
        viewController1 = [[Number1ViewController alloc] initWithNibName:@"Number1ViewController_iPad" bundle:nil];
        viewController2 = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController_iPad" bundle:nil];
    }
    self.tabBarController = [[UITabBarController alloc] init];
    self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, nil];


        UILocalNotification *notification = [launchOptions objectForKey:

                                             UIApplicationLaunchOptionsLocalNotificationKey];


        if (notification) {

            NSString *stringReminder = [notification.userInfo 

                                      objectForKey:@"TextforReminder"];

            [viewController showReminder:stringReminder];


        }


    }



    application.applicationIconBadgeNumber = 0;
    [[UIApplication sharedApplication] cancelAllLocalNotifications];


    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

or:

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {

    UIApplicationState state = [application applicationState];

    if (state == UIApplicationStateInactive) {

        application.applicationIconBadgeNumber = 0;
        [[UIApplication sharedApplication] cancelAllLocalNotifications];


        NSString *stringReminder = [notification.userInfo

                                  objectForKey:@"TextforReminder"];

        [viewController showReminder:stringReminder];

    }

}

However I am getting errors regarding the view Controller. Use of undeclared identifier ‘viewController’. I understand that this is becuase there is no view controller, however I don’t unterstand how I have to achieve, that the Reminder is shown in the process.

Thanks a lot for your help, I am not getting further in this problem.

Cheers

Answer 1

As your warning is trying to tell you the problem in application:didFinishLaunchingWithOptions: is in.

if (notification) {
    NSString *stringReminder = [notification.userInfo objectForKey:@"TextforReminder"];
    [viewController showReminder:stringReminder];
}
application.applicationIconBadgeNumber = 0;
[[UIApplication sharedApplication] cancelAllLocalNotifications];

UIViewController has no method named showReminder:, so I assume it’s in your subclass of one of your UIViewController subclasses.

You need to do two things,

1) Replace ‘viewController‘ with either ‘viewController1‘ or ‘viewController2‘ whichever has the method showReminder:

2) You need to wait until these viewControllers are actually on screen before presenting more views on top of them. So move the block above to after the [self.window makeKeyAndVisible] but before return YES.

Edited as comment says SettingViewController will have the showReminder: method;

As far as the problem receiving LocalNotifications while the app is running. If your app is simple then maybe just replace ‘viewController‘ with:

(SettingsViewController *)[self.tabBarController.viewControllers objectAtIndex:1]

Since in your code you add it as the second element of the viewControllers property.