VOIP push notification - ios

Question

I want to play sound when my app kill in background mode. For this I am using VOIP notification. My method is call and sound play in foreground mode. But in background mode method call sound not fire. Here is my code snippet.
func pushRegistry(registry: PKPushRegistry, didReceiveIncomingPushWithPayload payload: PKPushPayload, forType type: String) {
var a = payload.dictionaryPayload
// NSBundle.mainBundle().pathForResource(<#T##name: String?##String?#>, ofType: <#T##String?#>)
let url = NSBundle.mainBundle().URLForResource("demo", withExtension: "mp3")!
do {
player = try AVAudioPlayer(contentsOfURL: url)
guard let player = player else { return }
player.prepareToPlay()
player.play()
} catch let error as NSError {
print(error.description)
}
}

Answer 1

Once you receive pushkit payload. You have to schedule local notification with sound file. Your sound file plays max for 30 seconds.
import UIKit
import PushKit
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,PKPushRegistryDelegate {
var window: UIWindow?
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
}
}
Refer