Question

我想在用户选定的小时之间向用户显示本地通知，并且每半小时重复一次通知，直到所选小时的限制到来，并且每天重复此通知。我使用过这段代码

let components = calendar.dateComponents(in: .current, from: date)
     var triggerDate = DateComponents()
            triggerDate.hour = components.hour
            triggerDate.minute = components.minute
            let trigger = UNCalendarNotificationTrigger(dateMatching: triggerDate, repeats: true)

但是这只是在用户选择的特定时间每天重复通知，但我想在特定时间每半小时重复一次。我使用了UNNotifications.Any帮助将非常感谢。谢谢

Answer 1

如果要在所选时间之间每隔半小时显示本地通知，则必须为每小时设置不同的通知，并使用不同的通知标识符：

var dateStart = "Pass Your Start Date for Notification."
let dateEnd = "Pass Your End Date for Notification."

//Check Start Date is less then End Date is not.        
while dateStart < dateEnd {

     dateStart = dateStart.addingTimeInterval(0.5 * 60 * 60) //Add half an hour to start time

    //Schedule notification With body and title.
    scheduleNotification(at: dateStart, body: "Show Me", titles: "Remainder")

}

通过以下函数实施通知：

//Schedule Notification with Daily bases.
func scheduleNotification(at date: Date, body: String, titles:String) {

    let triggerDaily = Calendar.current.dateComponents([.hour,.minute,.second], from: date)

    let trigger = UNCalendarNotificationTrigger(dateMatching: triggerDaily, repeats: true)

    let content = UNMutableNotificationContent()
    content.title = titles
    content.body = body
    content.sound = UNNotificationSound.default()
    content.categoryIdentifier = "todoList"

    let request = UNNotificationRequest(identifier: "NotificationAt-\(date))", content: content, trigger: trigger)

    UNUserNotificationCenter.current().delegate = self
  //UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
    UNUserNotificationCenter.current().add(request) {(error) in
        if let error = error {
            print("Uh oh! We had an error: \(error)")
        }
    }
}

在dateStart变量中传递开始Date，在dateEnd变量中传递Date结束日期。

每天和每半小时重复UNNotifications

1 个答案: