swift - Swift 3 - 本地通知的 didReceiveRemoteNotification 函数未触发

Question

当应用程序在前台运行/未运行时，我已设法安排通知并将其显示给用户。现在我需要ViewController在点击此通知时显示一个。

我知道这didReceiveRemoteNotification是用户点击通知时调用的函数。在我的情况下，这个函数永远不会被触发。

应用委托：

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

    let center = UNUserNotificationCenter.current()
    center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
            // Enable or disable features based on authorization.
        }

        return true
}

//didReceiveRemoteNotification goes here

didReceiveRemoteNotification 函数：

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
        if ( application.applicationState == UIApplicationState.active)
        {
            print("Active")
            // App is foreground and notification is recieved,
            // Show a alert.
        }
        else if( application.applicationState == UIApplicationState.background)
        {
            print("Background")
            // App is in background and notification is received,
            // You can fetch required data here don't do anything with UI.
        }
        else if( application.applicationState == UIApplicationState.inactive)
        {
            print("Inactive")
            // App came in foreground by used clicking on notification,
            // Use userinfo for redirecting to specific view controller.
        }
}

这是我的AppDelegate. 我错过了什么吗？

Answer 1

对于UserNotifications您需要使用的框架UNUserNotificationCenterDelegate，因此在方法中实现UNUserNotificationCenterDelegate并AppDelegate设置委托didFinishLaunchingWithOptions。

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

    let center = UNUserNotificationCenter.current()
    center.delegate = self
    center.requestAuthorization(options: [.alert, .sound]) { (granted, error) in
        // Enable or disable features based on authorization.
    }

    return true
}

现在您需要实现userNotificationCenter(_:willPresent:withCompletionHandler:)和userNotificationCenter(_:didReceive:withCompletionHandler:)方法来获取通知。

func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {

    //Handle notification
}

func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
    // pull out the buried userInfo dictionary
    let userInfo = response.notification.request.content.userInfo

    if let customData = userInfo["customData"] as? String {
        print("Custom data received: \(customData)")

        switch response.actionIdentifier {
        case UNNotificationDefaultActionIdentifier:
            // the user swiped to unlock
            print("Default identifier")

        case "show":
            // the user tapped our "show more info…" button
            print("Show more information…")
            break

        default:
            break
        }
    }

    // you must call the completion handler when you're done
    completionHandler()
}

您还可以查看此AppCoda教程Introduction to User Notifications Framework in iOS 10以获取更多详细信息。