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 kno

Answer 1

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"];
}