在 AppDelegate Swift 中获取本地通知的正文或标识符

问题描述

我想在应用程序收到操作响应时访问 AppDelegate.swift 中的应用程序数据.我试图使用

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping() -> Void) {如果 response.actionIdentifier == "check" {//对应用程序的数据做一些事情}完成处理程序()}

方法，但我无法找到数据，因为我无法获得通知的标识符或其正文.有人可以帮我吗?非常感谢你们.

更多代码:

//设置通知内容让内容 = UNMutableNotificationContent()content.title = "预定任务"content.body = taskDescriptionTextField.text！内容.徽章 = 1content.sound = UNNotificationSound.default()content.categoryIdentifier = "alertCategory"//设置通知触发时间让日期 = datePicker.datelet dateCompenents = Calendar.current.dateComponents([.year,.month,.day,.hour,.minute,.second], from: date)让触发器 = UNCalendarNotificationTrigger(dateMatching: dateCompenents, repeats: false)//添加请求let request = UNNotificationRequest(identifier: taskDescriptionTextField.text!, content: content, trigger: trigger)UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

解决方案

做:

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping() -> Void) {print("原始标识符为:\(response.notification.request.identifier)")打印(原始正文是:\(response.notification.request.content.body)")打印(在通知中点击")}

基本上是这样，你得到一个 UNNotificationResponse 实例.该对象有两个属性.

• var actionIdentifier: String
• var notification: UNNotification <-- 你需要使用这个.

也可以找到一个非常好的 UNUserNotification 框架教程 这里

如果您想知道用户在收到通知时选择了哪个操作(他们只是点击它吗?！他们是否刚刚关闭它?！)还是他们选择了 customAction?！)

//来自 Apple 文档:用户可以从中选择的操作标识符:

* UNNotificationDismissActionIdentifier 如果用户关闭了通知* UNNotificationDefaultActionIdentifier 如果用户从通知中打开了应用程序* 用于其他操作的已注册 UNNotificationAction 的标识符

它的意思是，你可以用来做这样的事情:

switch actionIdentifier {case UNNotificationDismissActionIdentifier://通知被用户拒绝//做点什么完成处理程序()case UNNotificationDefaultActionIdentifier://应用程序是从通知中打开的//做点什么完成处理程序()//做其他事情案例自定义操作:完成处理程序()默认:完成处理程序()}

要创建自定义操作，您必须:

• 在类别中创建一个动作
• 注册类别

有关更多信息，请参阅 WWDC 2016 预先通知

I want to access my application data in AppDelegate.swift whenever the app receives an action response. I was trying to use the

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

    if response.actionIdentifier == "check" {
        //do something to the app's data
    }

    completionHandler()

}

method, but I can't locate the data because I can't get the notification's identifier nor its body text. Could somebody help me on that? Thank you guys so much.

More Code:

//Setting content of the notification
let content = UNMutableNotificationContent()
content.title = "Scheduled Task"
content.body = taskDescriptionTextField.text!
content.badge = 1
content.sound = UNNotificationSound.default()
content.categoryIdentifier = "alertCategory"
//Setting time for notification trigger
let date = datePicker.date
let dateCompenents = Calendar.current.dateComponents([.year,.month,.day,.hour,.minute,.second], from: date)
let trigger = UNCalendarNotificationTrigger(dateMatching: dateCompenents, repeats: false)
//Adding Request
let request = UNNotificationRequest(identifier: taskDescriptionTextField.text!, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)

解决方案

Do:

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

    print("original identifier was : \(response.notification.request.identifier)")
    print("original body was : \(response.notification.request.content.body)")
    print("Tapped in notification")
}

Basically what it is, is that you get a UNNotificationResponse instance back. That object has two properties.

• var actionIdentifier: String
• var notification: UNNotification <-- You need to use this one.

Also a very very good tutorial for UNUserNotification framework can be found here

---

You only use the actionIdenfier if you want to find out which action did the user choose when they were presented a notification (Did they just just tap on it?! Did they just dismiss it?! Or did they select on a customAction?!)

// From Apple documentation: the action identifier that the user can chose from:

What it means is, you can use to do something like:

switch actionIdentifier {
case UNNotificationDismissActionIdentifier: // Notification was dismissed by user
    // Do something
    completionHandler()
case UNNotificationDefaultActionIdentifier: // App was opened from notification
    // Do something
    completionHandler()
    // Do something else
case customAction:
    completionHandler()
default:
    completionHandler()
}

To create custom actions you must:

• create an action inside a category
• register the category

For more information see this moment from WWDC 2016 Advance Notifications

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