UNUserNotificationCenter没有被调用

时间:2016-11-23 07:15:53

标签: ios swift

当我发送推送通知时,应用程序位于前台willPresent被调用。永远不会调用didReceive。当应用程序在后台并收到推送通知时,会显示警报,但应用程序从不会调用didReceivewillPresent

在项目>功能,我检查了背景模式Location updatesRemote notifications。位置更新适用于不相关的代码。

我还启用了推送通知。这是正常的,因为他们正在收到。

我已在UNUserNotificationCenter中实施了AppDelegate通知内容,请参阅下文:

import UserNotifications
...

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {
...

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

    // MARK: - Push Notifications

    func registerForPushNotifications(application: UIApplication) {
        let notificationCenter = UNUserNotificationCenter.current()
        notificationCenter.delegate = self
        notificationCenter.requestAuthorization(options: [.badge, .sound, .alert], completionHandler: {(granted, error) in
            if (granted)
            {
                UIApplication.shared.registerForRemoteNotifications()
            }
            else{
                //Do stuff if unsuccessful...
                print("Unsuccessful in registering for push notifications")
            }
        })
    }

    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        //convert the deviceToken to a string
        let deviceTokenString = deviceToken.map { String(format: "%02.2hhx", arguments: [$0]) }.joined()

        let ud = UserDefaults.standard
        ud.set(deviceTokenString, forKey: "deviceToken")
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        //Handle the notification
        print("User Info = ",notification.request.content.userInfo)
        completionHandler([.alert, .badge, .sound])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        //handle the notification
        print("Push notification: ",response.notification.request.content.userInfo)

        ... code to import the notification data into Core Data.

        completionHandler()
    }

...
}

为什么没有调用didReceive的任何想法?

这是收到的推送通知:

[AnyHashable("aps"): {
    alert = "[name] has added you as a friend.";
    category = "NEWS_CATEGORY";
    "related_user_id" = 55;
    sound = default;
    type = "friend_request";
}]

iOS 10.1,Swift 3。

3 个答案:

答案 0 :(得分:6)

我发现获得许可后需要设置委托。

否则,当您第一次在应用程序中吃午餐时,您会在获得权限之前注册委托,并且didReceive函数不会触发-这仅在您第一次运行应用程序时发生,杀死并重新启动后就可以了。

见下文:

Tick

答案 1 :(得分:1)

当您收到通知时,

didReceive 不会被执行,当用户对收到的通知执行操作时会执行该通知

来自https://peter.sh/experiments/chromium-command-line-switches/

的Apple文档
  

要求您的应用知道用户为给定通知选择了哪个操作。

这意味着当用户对收到的通知执行操作时会调用此方法(按下通知,向下滑动等)

答案 2 :(得分:0)

如果您点按通知横幅,系统会调用willPresent方法。

如果您希望在后台处理推送通知而无需点击横幅,则应将{" content-available":1}附加到通知有效负载。此类推送通知称为 silent 推送。这将创建通知横幅/警报,就像正常推送一样,您必须自己创建横幅。

当您收到带有" content-available"的推送通知时,当应用在后台时,将调用didReceive委托方法。

N.B。您还必须添加“远程通知”#39;在plist文件的UIBackgroundModes键中。