Making a Local notification that only repeats on a specific day

Question

I am working on a local notification for an app that should only fire on a specific day and repeat on that day until the user decided to remove it. An example notification is on that fires every Wednesday at 11:00am.

The function - scheduleLocalNotification is triggered when the user presses done on the Time picker.

 var sundayNotification : UILocalNotification! var mondayNotification : UILocalNotification! var tuesdayNotification : UILocalNotification! var wednesdayNotification : UILocalNotification! var thursdayNotification : UILocalNotification! var fridayNotification : UILocalNotification! var saturdayNotification : UILocalNotification! func scheduleLocalNotification() { //Check the Dayname and match fireDate if dayName == "Sunday" { sundayNotification = UILocalNotification() //timeSelected comes from the timePicker i.e. timeSelected = timePicker.date sundayNotification.fireDate = fixNotificationDate(timeSelected) sundayNotification.alertTitle = "Sunday's Workout" sundayNotification.alertBody = "This is the message from Sunday's workout" sundayNotification.alertAction = "Snooze" sundayNotification.category = "workoutReminderID" let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate appDelegate.saveContext() UIApplication.sharedApplication().scheduleLocalNotification(sundayNotification) } else if dayName == "Monday" { mondayNotification = UILocalNotification() mondayNotification.fireDate = fixNotificationDate(timeSelected) mondayNotification.alertTitle = "Monday's Workout" mondayNotification.alertBody = "This is the message from Monday's workout" mondayNotification.alertAction = "Snooze" mondayNotification.category = "workoutReminderID" let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate appDelegate.saveContext() UIApplication.sharedApplication().scheduleLocalNotification(mondayNotification) } else if ..... } } func fixNotificationDate(dateToFix: NSDate) -> NSDate { let dateComponets: NSDateComponents = NSCalendar.currentCalendar().components([NSCalendarUnit.Hour, NSCalendarUnit.Minute], fromDate: dateToFix) dateComponets.second = 0 if dayName == "Sunday" { dateComponets.weekday = 1 //n = 7 } else if dayName == "Monday" { dateComponets.weekday = 2 } else if dayName == "Tuesday" { dateComponets.weekday = 3 } else if dayName == "Wednesday" { dateComponets.weekday = 4 } else if dayName == "Thursday" { dateComponets.weekday = 5 } else if dayName == "Friday" { dateComponets.weekday = 6 } else if dayName == "Saturday" { dateComponets.weekday = 7 } let fixedDate: NSDate! = NSCalendar.currentCalendar().dateFromComponents(dateComponets) return fixedDate }

After doing a check of the day to assign the notification the right UILocalNotification, this still strangely does not work e.g. setting different times on a different days (Sunday at 10:10am and Monday at 10:15am) for the notification does not change anything. The notification still fires on a day I did not select, i.e. Today at both those times instead of those days.

Any clues on what I could be doing wrong or missing? Thanks in advance. :)

@D.Greg Only today! I tried setting it to other days but that test did no succeed. — Gugulethu
– Gugulethu, Commented Mar 10, 2016 at 14:40

D. Greg · Accepted Answer · 2016-03-11 00:39:43Z

After some work, I came up with this. We start by changing the date to the first fire date the user selects.

func setNotificationDay(today: NSDate, selectedDay: Int) -> NSDate { let daysToAdd: Int! let calendar = NSCalendar.currentCalendar() let weekday = calendar.component(.Weekday, fromDate: today) if weekday > selectedDay { daysToAdd = (7 - weekday) + selectedDay } else { daysToAdd = (selectedDay - weekday) } let newDate = calendar.dateByAddingUnit(.Weekday, value: daysToAdd, toDate: today, options: []) return newDate! //if you don't have a date it'll crash }

You can just use NSDate() instead of requiring it as a parameter. I'll leave that up to you.

Now, we need to set the notification. I didn't do anything with your fixNotificationDate(), but you can add it in easily. The key point here is to set notification.repeatInterval = .Weekday or it won't repeat. I also added a dictionary to set the day name. It's better than repeating the code as much as you did.

It does create a second call to NSCalendar, but you can probably find a way to avoid doing that in your code.

func scheduleLocalNotification(date: NSDate) { let dayDic = [1:"Sunday", 2:"Monday", 3:"Tuesday", 4:"Wednesday", 5:"Thursday", 6:"Friday", 7:"Saturday"] let calendar = NSCalendar.currentCalendar() let weekday = calendar.component(.Weekday, fromDate: date) let notification = UILocalNotification() notification.fireDate = date notification.repeatInterval = .Weekday notification.alertTitle = String(format: "%@'s Workout", dayDic[weekday]!) notification.alertBody = String(format: "This is the message from %@'s workout", dayDic[weekday]!) notification.alertAction = "Snooze" notification.category = "workoutReminderID" notification.soundName = UILocalNotificationDefaultSoundName UIApplication.sharedApplication().scheduleLocalNotification(notification) }

And that should solve your problem. I didn't test it because it would take at least a week! ;)

Hope that helps!

Awesome and thanks for the scheduleLocalNotification() that uses the Dict. Definitely a much better approach. I have set up the first notification and it fired. ;) I'll see how the other's do over the coming week. Thanks so much.

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