Ios Swift 4中未校准通知触发器的问题

我在设置由DateComponents确定的UNCalendarNotificationTrigger类型的通知时遇到问题

//set content
let content = UNMutableNotificationContent()
content.title = "My Notification Management Demo"
content.subtitle = "Timed Notification"
content.body = "Notification"
content.body = "Notification pressed \(pressed) times"
content.categoryIdentifier = "message"

//set trigger possible problem
let formatted = DateFormatter()
formatted.dateFormat = "yyyy-MM-dd'T'HH:mm:ssxxxxx"
formatted.date(from: "2018-01-19T02:29:50+0000")

var dateInfo = DateComponents()
dateInfo.calendar = formatted.calendar

let trigger = UNCalendarNotificationTrigger(
    dateMatching: dateInfo,
    repeats: false
)

//Create the request
let request = UNNotificationRequest(
    identifier: "my.notification",
    content: content,
    trigger: trigger
 )

 //Schedule the request
 UNUserNotificationCenter.current().add(request) { (error : Error?) in
     print("all ok")
 }

当我请求获取挂起的通知时，数组很宽

  UNUserNotificationCenter.current().getPendingNotificationRequests(completionHandler: {requests -> () in
        print("\(requests.count) requests -------")
        for request in requests{
            print(request.identifier)
        }
    })

---

具有相同、更简单的日期组件，如小时=20和分钟10。没有显示任何内容，我可以通过getPendingnotifications查看request.trigger。。。但时间一直是19点…：/您是否检查了从

UNUserNotificationCenter.current（）返回的错误。添加
？DateComponents只有一个日历，它实际上并不约束触发器。