UNUserNotificationCenter Swift - 在特定情况下不会触发本地通知

我在应用程序中使用本地通知时遇到问题。

我正在安排带有自定义内容和自定义操作类别的本地通知。它在 iOS 11 中进行调度和触发，但在 iOS 10 中则不然。

根据文档，它应该也可以在 iOS 10 中运行。

为什么我的代码在这种特定情况下不起作用？

代码如下：

AppDelegate.swift

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    .......

    if #available(iOS 10.0, *) {
        UNUserNotificationCenter.current().delegate = self
    }
    .......

    return true
}

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
    
    completionHandler([.alert, .sound, .badge])
}

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
    
    print("Local Notification :: ", response)
}

自定义操作代码

func configureNotificationCenter() {

    let actionRemindAgain = UNNotificationAction(identifier: NTConstants.LocalNotification.action.remindMeAgain, title: "Remind me Again!⏰", options: [.authenticationRequired])
    let actionViewDetails = UNNotificationAction(identifier: NTConstants.LocalNotification.action.viewDetails, title: "View Details!", options: [.foreground])
    let actionClose = UNNotificationAction(identifier: NTConstants.LocalNotification.action.dismiss, title: "Dismiss", options: [])
    
    //Event Category
    let eventCategory = UNNotificationCategory(identifier: NTConstants.LocalNotification.category.reminder, actions: [actionRemindAgain, actionViewDetails, actionClose], intentIdentifiers: [], options: [])
    
    //Register Category
    UNUserNotificationCenter.current().setNotificationCategories([eventCategory])
}

时间表代码

func scheduleLocalNotification() {
    
    self.configureNotificationCenter()
    
    //Local Notification
    let content = UNMutableNotificationContent()
    content.title = notifyTitle
    content.subtitle = notifySubTitle
    content.body = notifyDesc
    
    //Category
    content.categoryIdentifier = "reminder"
    
    //Trigger
    let scheduleDate = Date(timeIntervalSince1970: TimeInterval(scheduleTimeInterval / 1000)) //My Schedule Data
    let triggerDate = Calendar.current.date(byAdding: .hour, value: -2, to: scheduleDate) // Should be call before 2 hours
    let dateComponents = Calendar.current.dateComponents([.year, .month, .day, .hour, .minute], from: triggerDate!)
    
    let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: false)
    
    //Request
    let request = UNNotificationRequest(identifier: "notification_\((notifyId))", content: content, trigger: trigger)
    
    //Add Request
    UNUserNotificationCenter.current().add(request) { (error) in
        if let error = error {
            NTPrint("Unable to add notification : \(error.localizedDescription)")
        }
        else {
            NTPrint("Scheduled :: ", request.identifier)
        }
    }
}

此代码成功运行并安排本地通知。结果如下：

<UNNotificationRequest: 0x18d65360; 

identifier: notification_111, 

content: <UNNotificationContent: 0x18daead0; 

    title: Event..!!, 
    subtitle: 31 Mar at 2:00 PM to 01 Apr at 12:00 PM, 
    body: , 
    categoryIdentifier: reminder, 
    launchImageName: , 
    peopleIdentifiers: (), 
    threadIdentifier: , 
    attachments: (), 
    badge: (null), 
    sound: (null), 
    hasDefaultAction: YES, 
    defaultActionTitle: (null), 
    shouldAddToNotificationsList: YES, 
    shouldAlwaysAlertWhileAppIsForeground: NO, 
    shouldLockDevice: NO, 
    shouldPauseMedia: NO, 
    isSnoozeable: NO, 
    fromSnooze: NO, 
    darwinNotificationName: (null), 
    darwinSnoozedNotificationName: (null), 

    trigger: <UNCalendarNotificationTrigger: 0x18d51470; 
        dateComponents: <NSDateComponents: 0x18da3320>
        Calendar Year: 2018
        Month: 3
        Leap month: no
        Day: 31
        Hour: 12
        Minute: 00, 
    repeats: NO
>>

中午 12 点设置正确，因为我在 2 小时前设置。它在 iOS 11 设备上运行良好。但在 iOS 10 中不起作用。更新后的代码有什么问题吗？或者还有什么需要处理的吗？

要生成本地通知，内容.body不得为空或空白。

万一在解析时blank就正文而言，iOS 10不会生成本地推送。但它可以在 iOS 11 中运行。

的价值内容.body是关键问题。