Set time from DatePicker for reminder - swift

Question

Example (I try to create something like this.
Now u can see, here you may choose time and interval)
I created reminder, where a user can choose how often to receive notifications (every 2 days, every 3 days etc.), but I also want the user to be able to choose the time. I know how to create reminder which will send notifications at the selected time, but I have to use UNCalendarNotificationTrigger, and problem is that I use UNTimeIntervalNotificationTrigger. Thank you
#IBOutlet weak var picker: UIPickerView!
#IBOutlet weak var timePicker: UIDatePicker!
#IBAction func setReminderBtnTapped(_ sender: Any) {
let content = UNMutableNotificationContent()
content.title = "Test"
content.body = "Blablabla"
content.sound = .default
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: TimeInterval((picker.selectedRow(inComponent: 1)+1)*(24*3600)), repeats: true)
let request = UNNotificationRequest(identifier: "blabla.reminder", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { (error) in
if let error = error {
print("error")
}
}
print("Notification added")
}

Answer 1

try this code:
private func setLocalNotification(hour: Int, minute: Int, completionHandler: #escaping (Bool) -> Void) {
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .badge, .sound]) { [weak self] (granted, error) in
guard let self = self else {
return
}
let center = UNUserNotificationCenter.current()
center.removeAllPendingNotificationRequests()
guard error == nil else {
completionHandler(false)
return
}
if granted {
let content = UNMutableNotificationContent()
content.title = "title"
content.sound = UNNotificationSound.default
content.badge = 1
var dateComponents = DateComponents()
dateComponents.hour = hour
dateComponents.minute = minute
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
center.add(request)
completionHandler(true)
return
}
completionHandler(false)
}
}
and you can call by get date from datePicker like this:
let date = self.timepPicker.date
let calendar = Calendar.current
let hour = calendar.component(.hour, from: date) // get hour
let minutes = calendar.component(.minute, from: date) // get minute
self.setLocalNotification(hour: hour, minute: minutes) { [weak self] isSet in
guard let self = self else {
return
}
if !isSet {
let center = UNUserNotificationCenter.current()
center.removeAllPendingNotificationRequests() // remove previus notification
}
}
update answer for
repeat X time in every n day:
create extension from date for create simple date getDateComponents:
extension Date {
public func getDateComponents() -> DateComponents {
let dateComponents = Calendar.current.dateComponents([.hour, .minute, .second, .day], from: self)
return dateComponents
}
}
and update setLocalNotification function:
private func setLocalNotification(repeatCount: Int, jumpNextDay: Int, hour: Int, minute: Int) {
let center = UNUserNotificationCenter.current()
center.requestAuthorization(options: [.alert, .badge, .sound]) { (granted, error) in
let center = UNUserNotificationCenter.current()
center.removeAllPendingNotificationRequests()
guard error == nil else {
return
}
if granted {
let content = UNMutableNotificationContent()
content.title = "title"
content.sound = UNNotificationSound.default
content.badge = 1
// create date from hour and minute based on current
let firstDate = Calendar.current.date(bySettingHour: hour, minute: minute, second: 0, of: Date())!
let firstTimeInterval = firstDate.timeIntervalSince1970 // get timeInterval
// example run for
// repeat count 5 and jump 2
// 2 4 6 8 10
for i in stride(from: jumpNextDay, to: jumpNextDay * (repeatCount + 1), by: jumpNextDay) {
// create next day
// 86400 next time interval added to first time interval
// create time interval from first date
// 2 next day = firstTimeInterval + 2 * 86400
let timeIntervalForTrigger = firstTimeInterval + Double((i * 86400))
// create date from time interval
let date = Date.init(timeIntervalSince1970: timeIntervalForTrigger)
// create datecomponnet
let dateComponents = date.getDateComponents()
let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: false)
let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
center.add(request)
}
}
}
}
and call:
let date = self.timepPicker.date
let calendar = Calendar.current
let hour = calendar.component(.hour, from: date) // get hour
let minutes = calendar.component(.minute, from: date) // get minute
self.setLocalNotification(repeatCount: 2, jumpNextDay: 2, hour: hour, minute: minutes)