推送通知像Whatsapp或Viber一樣接收即時消息

Question

當Whatsapp（或Viber）iOS應用程序完全關閉（從後臺移除）時，按預期通過推送通知處理消息接收。
當您從推送通知中喚醒Whatsapp（或Viber）時，它會立即顯示所有收到的消息，而不會明確地從服務器上下載任何時間。
實際上，它看起來像每個推送通知喚醒應用程序有足夠的時間來下載已發送的消息，這是我相信，iOS中不可能的。

有沒有人有一個想法他們是如何實現的，快速接收一堆消息？

Answer 1

你應該使用PushKit，在您的Xcode項目>功能面板中啓用IP語音背景模式一起。這樣，VoIP推送通知可以喚醒您的應用程序，因此您可以處理收到的數據並顯示它。與標準推送通知相比，VoIP推送還有幾個優勢。更多信息可以在here找到。

Answer 2

無論是在後臺模式還是在終止模式下，您的應用都會在後臺調用。您的應用程序將在您當地的通知播放之前處於活動狀態（最長30秒）。

使用下面的結構來實現您的任務。

使用下面

<?php 

// Put your device token here (without spaces): 


     $deviceToken = '123456789'; 
// 


// Put your private key's passphrase here: 
$passphrase = 'ProjectName'; 

// Put your alert message here: 
$message = 'My first push notification!'; 



$ctx = stream_context_create(); 
stream_context_set_option($ctx, 'ssl', 'local_cert', 'PemFileName.pem'); 
stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase); 

// Open a connection to the APNS server 
$fp = stream_socket_client(
// 'ssl://gateway.push.apple.com:2195', $err, 
    'ssl://gateway.sandbox.push.apple.com:2195', $err, 
    $errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx); 

if (!$fp) 
    exit("Failed to connect: $err $errstr" . PHP_EOL); 

echo 'Connected to APNS' . PHP_EOL; 

// Create the payload body 

$body['aps'] = array(
        'content-available'=> 1, 
        'alert' => $message, 
        'sound' => 'default', 
        'badge' => 0, 
        ); 



// Encode the payload as JSON 

$payload = json_encode($body); 

// Build the binary notification 
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload; 

// Send it to the server 
$result = fwrite($fp, $msg, strlen($msg)); 

if (!$result) 
    echo 'Message not delivered' . PHP_EOL; 
else 
    echo 'Message successfully delivered' . PHP_EOL; 

// Close the connection to the server 
fclose($fp); 

使用此simplepush.php文件命令創建PEM文件，並用它在上面的代碼

$ openssl x509 -in aps_development.cer -inform der -out PushCert.pem 

# Convert .p12 to .pem. Enter your pass pharse which is the same pwd that you have given while creating the .p12 certificate. PEM pass phrase also same as .p12 cert. 
$ openssl pkcs12 -nocerts -out PushKey1.pem -in pushkey.p12 

Enter Import Password: 

MAC verified OK 

Enter PEM pass phrase: 

Verifying - Enter PEM pass phrase: 

# To remove passpharse for the key to access globally. This only solved my stream_socket_client() & certificate capath warnings. 
$ openssl rsa -in PushKey1.pem -out PushKey1_Rmv.pem 

Enter pass phrase for PushChatKey1.pem: 

writing RSA key 

# To join the two .pem file into one file: 
$ cat PushCert.pem PushKey1_Rmv.pem > ApnsDev.pem 

之後去simplepush.php位置和消防指揮 - > php simplepush.php

這樣你就可以測試你的推送工具包通知設置體系結構。

https://www.raywenderlich.com/123862/push-notifications-tutorial

Download

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 
    // From here you have to schedule your local notification 

} 

} 

讓我知道如果你需要更多的幫助。 祝您有個愉快的編碼。