Question

我正在使用Xcode 9.2，Swift 4.0编写VoIP应用程序，最低iOS版本是10.3。我想接收来电，即使iPhone处于睡眠模式（就像WhatsApp或Viber一样）。我已经知道我必须使用CallKit。但我不知道如何正确接收PUSH通知。我的意思是，我有两种方法可以接收它们。首先是在AppDelegate.swift中，请看（这种方法有效）：

import UIKit
import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

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

        //Getting permissions for Notifications
        //222
        UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) { granted, error in
        }
        application.registerForRemoteNotifications()
        //222

        return true
    }

    //For PUSH Notifications settings

    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
        print("NOTIFICATION ERROR: \(error)")
    }

    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        let pushToken = deviceToken.reduce("", {$0 + String(format: "%02X", $1)}).lowercased()
    }

    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
        // Receiving call?
    }

}

但是，无论我正在做什么，如果iPhone正在睡觉，它也不会触发来电。最近我看到还有另一种接收PUSH通知的方法。请看：

import UIKit
import CallKit
import PushKit

class ViewController: UIViewController, CXProviderDelegate, PKPushRegistryDelegate {

    override func viewDidLoad() {
        let registry = PKPushRegistry(queue: nil)
        registry.delegate = self
        registry.desiredPushTypes = [PKPushType.voIP]
    }

    func providerDidReset(_ provider: CXProvider) {
    }

    func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
        action.fulfill()
    }

    func provider(_ provider: CXProvider, perform action: CXEndCallAction) {
        action.fulfill()
    }

    func pushRegistry(_ registry: PKPushRegistry, didUpdate pushCredentials: PKPushCredentials, for type: PKPushType) {
        print(pushCredentials.token.map { String(format: "%02.2hhx", $0) }.joined())
    }

    func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void) {
        // Receive call?
    }

}

问题是在第一种方法中我有这个PUSH标记：9bcf73ac3d6a68be07c26d8b6a972f5b716cd5308f1a19048b62d19b9b8d4bd1

第二种方法返回此PUSH令牌： 1e40fafb2963161b1bcf1bdde00d625a879c6934e19e2fb32f62b1c9272e956f

他们不平等！怎么会这样？因此，主要问题是：如何接收PUSH通知以及AppDelegate和PushKit方法之间有什么区别以及哪个令牌是正确的？

感谢您的帮助！

Answer 1

首先删除此行application.registerForRemoteNotifications（）

现在来到puskit下面的方法会有正确的令牌

   func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, forType type: PKPushType) {
    print("\(#function) voip token: \(credentials.token)")

    let deviceToken = credentials.token.reduce("", {$0 + String(format: "%02X", $1) })
    print("\(#function) token is: \(deviceToken)")}

并且Push-kit框架没有像远程或本地通知这样的UI，您需要在每次调用以下方法时触发本地通知

func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void) {
    // Receive call?
}

如何正确接收PUSH通知？

1 个答案: