Using Timer To Schedule Notifications Triggering - ios

Question

I am trying to schedule a Timer to fire at a specific date and time, based on what the user selects in UIDatePicker. When the Timer fires, I want to set up a repeating notification (UNTimeIntervalNotificationTrigger) every 60 seconds. The Timer seems to fire and the console shows the notification being added without error, but I never receive a notification. What am I doing wrong?
#IBAction func triggerNotification(_ sender: Any) {
if (reminderText.text!.count > 0)
{
let timer = Timer(fireAt: datePicker.date, interval: 0, target: self, selector: #selector(setUpReminder), userInfo: nil, repeats: false)
RunLoop.main.add(timer, forMode: RunLoopMode.commonModes)
self.dismiss(animated: true, completion: nil)
reminderText.text = ""
}
}
#objc func setUpReminder()
{
let content = UNMutableNotificationContent()
let identifier = reminderText.text!
content.title = "Your Reminder"
content.body = identifier
content.badge = 1
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 60.0, repeats: true)
let request = UNNotificationRequest(identifier: identifier, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request){
(error) in
if error != nil
{
print("here error in setting up notification")
print(error!)
} else
{
print("notification scheduled")
}
}
}

Answer 1

func sendNotification(){
let content = UNMutableNotificationContent()
content.title = "Timer"
content.body = "30 Seconds"
content.sound = UNNotificationSound.default()
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 0.001, repeats: false)
let request = UNNotificationRequest(identifier: "timer.request", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { (error) in
if let error = error{
print("Error posting notification:\(error.localizedDescription)")
} else{
print("notification scheduled")
}
}
}
#objc func setUpReminder()
{
UNUserNotificationCenter.current().requestAuthorization(
options: [.alert,.sound])
{(granted, error) in
self.sendNotification()
}
}
this is working code you were just assigning wrong timeinterval :)