我的应用程序已注册为后台模式：IP语音，后台提取和远程通知。
我使用下面的代码成功收到了voip推送通知，但我无法启动应用程序来接听电话。收到voipPush后，如何在没有任何用户互动的情况下启动应用程序？
import UIKit
import PushKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, PKPushRegistryDelegate {
var voipRegistry:PKPushRegistry!
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
voipRegistry = PKPushRegistry(queue: dispatch_get_main_queue())
voipRegistry.delegate = self
voipRegistry.desiredPushTypes = Set([PKPushTypeVoIP])
print("VOIP Push registered")
return true
}
func pushRegistry(registry: PKPushRegistry!, didUpdatePushCredentials credentials: PKPushCredentials!, forType type: String!) {
let voipToken: String! = credentials.token.description
print("\n\n##### PushKit credential: \n\n", voipToken)
}
func pushRegistry(registry: PKPushRegistry!, didReceiveIncomingPushWithPayload payload: PKPushPayload!, forType type: String!) {
let data = payload.dictionaryPayload
print("\n\n##### Received PushKit Data: \n\n", data)
let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let videocallViewController = storyboard.instantiateViewControllerWithIdentifier("videocallViewController")
window!.rootViewController = videocallViewController
}
}