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Fire date update for local notification and cancellation of previous notification

I know that there are several questions here and there about how to delete a local notification, which can be either an entire or a specific notification. I also looked through the link of the local notification class and found some methods, such as retry time, fire date, body warning, time zone, etc., but I can not find out any information on how to change the fire date, which is already has been installed. If the user sets a notification with the date today and the time 16:50, but if the user wants to change the set date / time, then what happens in the notification works in both cases. This is a mistake regarding programming ethics!

In fact, I want the previous notification to be canceled, that is, the date must be changed to edit it, and the notification must be set and run on the new date.

Here is how I set up the notification, sample code:

- (void)setNotification
{
    //Set notification after confirmation of saved data

    Class cls = NSClassFromString(@"UILocalNotification");
    reminderNotification = [[cls alloc] init];

    if (cls != nil) 
    {        
       NSDateFormatter *dateFormat = [[[NSDateFormatter alloc]init]autorelease];
       [dateFormat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
       NSDate *notificationDate = [dateFormat dateFromString:textField2.text];
       reminderNotification.fireDate = notificationDate;
       reminderNotification.timeZone = [NSTimeZone defaultTimeZone];
       NSString *reminderText = [NSString stringWithFormat:@"%@  %@ on %@",textField.text,textField1.text,strDate];
       reminderNotification.alertBody = reminderText;
       reminderNotification.alertAction = @"View";
       reminderNotification.soundName = @"lazy_afternoon.mp3";
       reminderNotification.applicationIconBadgeNumber = 1;
       NSDictionary *userDict = [NSDictionary dictionaryWithObject:self.textField1.text forKey:kReminder];
       reminderNotification.userInfo = userDict;
       [[UIApplication sharedApplication] scheduleLocalNotification:reminderNotification];
       [reminderNotification release];
    }
}

Can anyone direct me on the right path, how to cope with this task.

Thanks to everyone in advance :)

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2 answers

Use this method to schedule a notification where the notification identifier must be unique

 -(void) scheduleNotificationForDate:(NSDate *)date AlertBody:(NSString *)alertBody ActionButtonTitle:(NSString *)actionButtonTitle NotificationID:(NSString *)notificationID{

    UILocalNotification *localNotification = [[UILocalNotification alloc] init];
    localNotification.fireDate = date;
    localNotification.timeZone = [NSTimeZone localTimeZone];
    localNotification.alertBody = alertBody;
    localNotification.alertAction = actionButtonTitle;
    localNotification.soundName = @"yourSound.wav";

    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:notificationID forKey:notificationID];
    localNotification.userInfo = infoDict;

    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}

Use this method to cancel a special notification using this identifier

- (void)cancelLocalNotification:(NSString*)notificationID {
    //loop through all scheduled notifications and cancel the one we're looking for
    UILocalNotification *cancelThisNotification = nil;
    BOOL hasNotification = NO;

    for (UILocalNotification *someNotification in [[UIApplication sharedApplication] scheduledLocalNotifications]) {
        if([[someNotification.userInfo objectForKey:notificationID] isEqualToString:notificationID]) {
            cancelThisNotification = someNotification;
            hasNotification = YES;
            break;
        }
    }
    if (hasNotification == YES) {
        NSLog(@"%@ ",cancelThisNotification);
        [[UIApplication sharedApplication] cancelLocalNotification:cancelThisNotification];        
    }
}

Link: UILocalNotification

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, , , , , .

for(UILocalNotification *aNotif in [[UIApplication sharedApplication] scheduledLocalNotifications]) {
        if([[aNotif.userInfo objectForKey:@"id"] isEqualToString:nId]) {
            [[UIApplication sharedApplication]cancelLocalNotification:aNotif];
        }
    }

.

+3

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