How to delete all local notifications when an application is deleted from an iPhone

Question

Let's say I set 5 local notification for an iPhone application, then the user deletes the app. If the app is installed again, it shows the previous notifications.

I know the following code deletes all notifications

[[UIApplication sharedApplication] cancelAllLocalNotifications];

But where do I put that code so that it executes when the application is deleted?

Or any other way to solve this problem.

Could you not delete it on first launch instead? For example if a certain flag in UserSettings is not set, you cancel them all and set the flag? — Joachim Isaksson, Feb 14 '12 at 05:50
In this application i use the database for the storing and retriveing the notification object also — Nimit Parekh, Feb 14 '12 at 06:52
Neon.. does this helps? http://stackoverflow.com/questions/12369900/when-i-delete-my-ios-application-push-notification-state-remains — Pradip, Oct 29 '12 at 17:55

score 32 · Accepted Answer · edited Nov 21 '14 at 04:58

32

As others have mentioned, I think the best way to accomplish this is to have a flag in didFinishLaunchingWithOptions in the application delegate that checks if it is the first launch or not.

If the app is being launched for the first time, you can call

[[UIApplication sharedApplication] cancelAllLocalNotifications];

This will cancel any existing notifications.

For example:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

    // this flag will need to be stored somewhere non-volatile such as using CoreData 
    // or user defaults
    if(flag == nil || [flag count] ==0){ 

       [[UIApplication sharedApplication] cancelAllLocalNotifications];

       // update your flag so that it fails this check on any subsequent launches
       flag = 1;
    }
{

edited Nov 21 '14 at 04:58

Pochi

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answered Oct 25 '13 at 16:58

Derek Hewitt

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Don't local notifications get deleted automatically if an app is deleted? I don't see why they should be reinstated of a fresh app install? – Supertecnoboff Mar 28 '16 at 17:11
1

I believe they are retained for a certain period of time in case the application is reinstalled. I will post the documentation if I can find it. – Derek Hewitt Mar 28 '16 at 22:47
No on deletion Notifications are not cleared. I created an app and I schedule some local notifications. Then I deleted the app and installed again but the notifications kept coming(this time around no implementation for local notifications). This is why I believe they are retained but I am not sure about this(retain) duration – Muhammad Nayab Nov 15 '17 at 22:10

score 3 · Answer 2 · answered Jun 17 '15 at 19:11

Here's what I did:

In Your AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    //Check if its first time
    if (![[NSUserDefaults standardUserDefaults] objectForKey:@"is_first_time"]) {
        [application cancelAllLocalNotifications]; // Restart the Local Notifications list
        [[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithBool:YES] forKey:@"is_first_time"];
    }

    return YES;
}

Hope it helps!

Igor Kovryzhkin · Answer 3 · 2017-03-16T16:15:10.010

For swift 3.0 you can use

if (isFirstLaunch){  
  UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
}

Then add this method to check if this is the first run

var isFirstLaunch: Bool {
    get {
        if     (NSUserDefaults.standardUserDefaults().objectForKey("firstLaunchDate") == nil) {
            NSUserDefaults.standardUserDefaults().setObject(NSDate(),     forKey: "firstLaunchDate")
            NSUserDefaults.standardUserDefaults().synchronize()
            return true
        }
        return false
    }
}

score 0 · Answer 4 · answered May 14 '15 at 11:13

You can use UIPasteboard to store a flag as DerekH already mentioned.
Something link this:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    if ([self mustCancelNotifications]) {
        [application cancelAllLocalNotifications];
        [self removeTag];
    } else {
        // Set your local notifications
        [self setFlag];
    }

    //...   

    // Override point for customization after application launch.
    return YES;
}

- (BOOL)mustCancelNotifications
{
    UIPasteboard *past = [UIPasteboard generalPasteboard];
    NSString *s = [past valueForPasteboardType:@"my_app_local_notifications"];
    if (s) {
        return YES;
    }
    return NO;
}

- (void)setFlag
{
    UIPasteboard *past = [UIPasteboard generalPasteboard];
    [past setValue:@"dummy" forPasteboardType:@"my_app_local_notifications"];
}

- (void)removeFlag
{
    UIPasteboard *past = [UIPasteboard generalPasteboard];
    [past setData:nil forPasteboardType:@"my_app_local_notifications"];
}

score -7 · Answer 5 · answered Nov 04 '12 at 10:01

-7

Go to your appDelegate.m, in function «didFinishLaunchingWithOptions» add this code:

application.applicationIconBadgeNumber = 0;

answered Nov 04 '12 at 10:01

Solidus

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10

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I don't want delete the local notification rather then badge. – Nimit Parekh Nov 05 '12 at 04:47

How to delete all local notifications when an application is deleted from an iPhone

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