how to achieve whats app (iOS version) notification handling after killing whatsapp by swipe up

Till now after searching what i know is, in iOS , notifications cannot be handled, once the app is killed , and after that app is launched by tapping app icon.

i want to achieve what whatsapp does, i.e.

1) i kill whatsapp from multitasking swipe up. 2) i receive whatsapp 1 new message push notification. 3) then without launching whatsapp(through app icon or through notification) i disconnect mobile data/ wifi or any internet connection. 4) after disconnecting all connections, i launch whatsapp BY LAUNCHING IT FROM APP ICON(and not from notification). 5) then i find that those notification message is already shown at the top chat as the new message with message count.

Now, my concern is, how does whats app handle push notification, even after app is killed.

How do I manage WhatsApp notifications?

Open WhatsApp > tap More options > Settings > Notifications. You can change notifications for messages, groups, and calls by choosing: Whether to turn conversation tones for incoming and outgoing messages on or off. Notification tone or ringtone.

PushKit is the only solution...

For ref:- https://developer.apple.com/library/ios/documentation/NetworkingInternet/Reference/PushKit_Framework/