Repeating local notifications for specific days of week (Swift 3 IOS 10)

Question

I am trying to schedule local notifications for specific days of week (e.g. Monday, Wednesday and etc) and then repeat them weekly. This is how the screen for setting notifi

Answer 1

 let content = UNMutableNotificationContent()
 content.title = NSString.localizedUserNotificationString(forKey: "Wake up!", arguments: nil)
 content.body = NSString.localizedUserNotificationString(forKey: "Rise and shine! It's morning time!",
                                                                arguments: nil)
 content.categoryIdentifier = "TIMER_EXPIRED"

 let weekdaySet = [6,5]

   for i in weekdaySet {

        var dateInfo = DateComponents()
        dateInfo.hour = 16
        dateInfo.minute = 44
        dateInfo.weekday = i
        dateInfo.timeZone = .current

        let trigger = UNCalendarNotificationTrigger(dateMatching: dateInfo, repeats: true)
        let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
        center.add(request) { (error : Error?) in

        if let theError = error {
                print(theError.localizedDescription)
                }
            }
       }

Answer 2

You can use below function to get Date from selected picker value:

    //Create Date from picker selected value.
    func createDate(weekday: Int, hour: Int, minute: Int, year: Int)->Date{

        var components = DateComponents()
        components.hour = hour
        components.minute = minute
        components.year = year
        components.weekday = weekday // sunday = 1 ... saturday = 7
        components.weekdayOrdinal = 10
        components.timeZone = .current

        let calendar = Calendar(identifier: .gregorian)
        return calendar.date(from: components)!
    }

    //Schedule Notification with weekly bases.
    func scheduleNotification(at date: Date, body: String, titles:String) {

        let triggerWeekly = Calendar.current.dateComponents([.weekday,.hour,.minute,.second,], from: date)

        let trigger = UNCalendarNotificationTrigger(dateMatching: triggerWeekly, repeats: true)

        let content = UNMutableNotificationContent()
        content.title = titles
        content.body = body
        content.sound = UNNotificationSound.default()
        content.categoryIdentifier = "todoList"

        let request = UNNotificationRequest(identifier: "textNotification", content: content, trigger: trigger)

        UNUserNotificationCenter.current().delegate = self
        //UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
        UNUserNotificationCenter.current().add(request) {(error) in
            if let error = error {
                print("Uh oh! We had an error: \(error)")
            }
        }
    }

After getting a value from picker pass picker hour, minute and year with selected week day as (Sunday = 1, Monday = 2, Tuesday = 3, Wednesday = 4, thursday = 5, Friday = 6, Saturday = 7) to function func createDate(weekday: Int, hour: Int, minute: Int, year: Int) to get notification fire date on weekly bases, and after getting date call function func scheduleNotification(at date: Date, body: String, titles:String) for schedule a notification.