Question

我试图复制WhatsApp如何向主叫方设备发出有关来电的信号，当来电者开始呼叫关闭该WhatsApp的用户时。根据锁定屏幕，呼叫接收器的设备似乎是以大约1秒的间隔重复接收推送通知，说“＆＃34;来自UserName＆＃34;”。但最值得注意的是，通知不会堆积。似乎每个有关来电的通知都会被下一个此类通知所取代。当呼叫者放弃呼叫时，被呼叫者端的最后一个呼入呼叫通知被＆＃34;未接呼叫＆＃34;通知。

如何以这种方式实现推送通知的替换/删除？

Answer 1

您可以使用“ apns-collapse-id”。它将用相同的ID替换Notification内容

https://developer.apple.com/documentation/usernotifications/unnotificationrequest/1649634-identifier

https://medium.com/the-guardian-mobile-innovation-lab/how-to-replace-the-content-of-an-ios-notification-2d8d93766446

Answer 2

WhatsApp使用静默通知来触发本地通知的显示。应用可以替换本地通知。这是我最后一次改变他们的过程。他们现在可能会使用Push Kit消息，因为它们是VoIP应用程序。

Answer 3

Whatsapp，Skype或任何其他与VOIP相关的应用程序都使用推送工具包。

在有效负载中使用content-available = 1使其成为静默推送通知。

即使您的应用处于终止状态（已终止状态），静音推送通知也会在后台调用您的应用，因此它将允许您安排本地通知。

为来电时间表本地通知
一旦获得未接来电的有效负载，取消来电本地通知并安排未接来电本地通知
注意 - 传入或未接来电本地通知对象始终保留在NSUserDefault中，以确保即使重新启动设备也可以取消其可用性。
您可以在localnotification.userInfo

Pushkit代码

import UIKit
import PushKit


class AppDelegate: UIResponder, UIApplicationDelegate,PKPushRegistryDelegate{



func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {


    let types: UIRemoteNotificationType = [.Alert, .Badge, .Sound]
    application.registerForRemoteNotificationTypes(types)

    self. PushKitRegistration()

    return true
}



//MARK: - PushKitRegistration

func PushKitRegistration()
{

    let mainQueue = dispatch_get_main_queue()
    // Create a push registry object
    if #available(iOS 8.0, *) {

        let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)

        // Set the registry's delegate to self

        voipRegistry.delegate = self

        // Set the push type to VoIP

        voipRegistry.desiredPushTypes = [PKPushTypeVoIP]

    } else {
        // Fallback on earlier versions
    }


}


@available(iOS 8.0, *)
func pushRegistry(registry: PKPushRegistry!, didUpdatePushCredentials credentials: PKPushCredentials!, forType type: String!) {
    // Register VoIP push token (a property of PKPushCredentials) with server

    let hexString : String = UnsafeBufferPointer<UInt8>(start: UnsafePointer(credentials.token.bytes),
        count: credentials.token.length).map { String(format: "%02x", $0) }.joinWithSeparator("")

    print(hexString)


}


@available(iOS 8.0, *)
func pushRegistry(registry: PKPushRegistry!, didReceiveIncomingPushWithPayload payload: PKPushPayload!, forType type: String!) {
    // Process the received push

    // As per payload schedule local notification / cancel local notification


}

}

各种pushkit有效载荷

{
    "aps": {
        "content-available": 1,
        "screen": "IncomingCall",
        "alertTitle": "Mr ...",
        "alertBody": "Call from ...",
        "category": "INCOMINGCALL_CATEGORY",
        "data": "Any specific data you want to pass"
    }
}

如何在接收设备上用另一个替换推送通知？

3 个答案: