Trigger notification weekly Swift 3 - swift3

Question

I am trying to make a schedule, in which I need to remember all the weeks I have class such as Monday at certain time. The problem is that if I assign weekday = 1 (Sunday) when I print the variable triggerWeekly it tells me that weekday = 2, so by performing the tests I do not receive such notification. I need to know why this happens
let weekday = 1 //Sunday 19 Mar
let calendar = NSCalendar.current
var date = DateComponents()
date.weekday = weekday
date.hour = 1
date.minute = 5
let ultimateDate = calendar.date(from: date)
let triggerWeekly = Calendar.current.dateComponents([.weekday, .hour, .minute], from:
ultimateDate!)
print(triggerWeekly) // hour: 1 minute: 5 second: 0 weekday: 2 isLeapMonth: false
let trigger = UNCalendarNotificationTrigger(dateMatching: triggerWeekly, repeats: true)
let identifier = "curso\(String(Index))"
let request = UNNotificationRequest(identifier: identifier,
content: content, trigger: trigger)

Answer 1

You can set your trigger to repeat every monday at 1:05am as follow:
import UserNotifications
let trigger = UNCalendarNotificationTrigger(dateMatching: DateComponents(hour: 1, minute: 5, weekday: 2), repeats: true)
print(trigger.nextTriggerDate() ?? "nil")
let content = UNMutableNotificationContent()
content.title = "title"
content.body = "body"
// make sure you give each request a unique identifier. (nextTriggerDate description)
let request = UNNotificationRequest(identifier: "identify", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { error in
if let error = error {
print(error)
return
}
print("scheduled")
}
Don't forget to ask the user permission to schedule notifications before trying to schedule your notification:
UNUserNotificationCenter.current().requestAuthorization(options:[.badge, .alert, .sound]) { granted, error in
if granted {
print("authorized")
}
}