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我的應用程序加載到視圖控制器中，告訴用戶爲什麼他們應該接受推送通知。直到他們按下此視圖控制器上的繼續按鈕後，我才希望它們接受推送通知。這意味着我需要將代碼包含在我的初始視圖控制器中的某處，我們稱之爲BeforePromptController。我在使用Firebase以防萬一。如何提示用戶接受AppDelegate之外的推送通知？
這是我在AppDelegate中的工作代碼（但是我想對其進行更改，以便在用戶按下BeforePromptController中的Continue按鈕後發生提示）。我試着只包含的AppDelegate這裏的重要組成部分..
import UIKit
import Firebase
import FirebaseMessaging
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, FIRMessagingDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
FIRApp.configure()
if #available(iOS 10.0, *) {
let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(
options: authOptions,
completionHandler: {_, _ in })
// For iOS 10 display notification (sent via APNS)
UNUserNotificationCenter.current().delegate = self
// For iOS 10 data message (sent via FCM)
FIRMessaging.messaging().remoteMessageDelegate = self
} else {
let settings: UIUserNotificationSettings =
UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
return true
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
if application.applicationState == UIApplicationState.active {
var pushNotificationMessage = ""
if let aps = userInfo["aps"] as? NSDictionary {
if let alert = aps["alert"] as? NSDictionary {
if let message = alert["message"] as? NSString {
pushNotificationMessage = message as String
}
} else if let alert = aps["alert"] as? NSString {
pushNotificationMessage = alert as String
}
}
let notificationAlert = UIAlertController(title: nil, message: pushNotificationMessage, preferredStyle: .alert)
let defaultAction = UIAlertAction(title: "OK", style: .default, handler: {
(alert: UIAlertAction!) -> Void in
})
defaultAction.setValue(Constants.activePushNotificationOKColor, forKey: "titleTextColor")
notificationAlert.addAction(defaultAction)
self.window?.rootViewController?.present(notificationAlert, animated: true, completion: nil)
}
}
}