使用计时器计划通知触发

Question

我正在尝试根据用户在UIDatePicker中选择的内容安排计时器在特定日期和时间触发。当计时器触发时，我想每 60 秒设置一次重复通知 (UNTimeIntervalNotificationTrigger(。计时器似乎已触发，控制台显示正在添加通知而没有错误，但我从未收到通知。我做错了什么？

@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()
}
}

这是您刚刚分配错误时间间隔的工作代码:)