如何在指定日期前2天触发UserNotifications

Question

如何在指定日期前2天触发UserNotifications

我以前尝试过UserNotification，但我知道我是基于时间间隔的，但我不知道如何才能基于日期触发此通知。谁能帮帮我..谢谢..:)

Answer 1

我想明白了，谢谢你的帮助。El西红柿

func prepareNotification() {

    let content = UNMutableNotificationContent()
    content.title = "Eva Reminder"
    content.body = "2 Days Left Before Your Period Days."
    content.sound = UNNotificationSound.default()

    var components = DateComponents()
    components.day = numberOfDaySelected - 2
    components.hour = 7
    components.minute = 0
    let trigger = UNCalendarNotificationTrigger(dateMatching: components, repeats: true)
    let request = UNNotificationRequest(identifier: "eva.notification", content: content, trigger: trigger)

    UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
}