BACKGROUND
I am buidling a chat messaging applicaiton and I faced a problem handling push notificaton when user receiving message from the sender.
WHAT I WANT TO ACHIEVE
Like Whatsapp does, after I received the push notification and I turned on the airplane mode, I still can see the message contents while I open the app. so, I believe it has gotten the message while receiving the notification.
PROBLEM
I cannot find a good way to handle the remote chat message push notification when the user opens the app through its icon on the home screen instead of pressing or doing another action on the notification.
WHAT I TRIED
I manually loaded the message when the app did apear, but this is not like the tested behavior on Whatsapp. I tried this third party socket library, but iOS killed the listening service once the app was closed, it is not applicable to what I want to build.
MY QUESTION
If still using the push notification or background mode remote notification, is that any way to able to handle the push notification when the app is not running?
I also find out about the Apple PushKit, I not sure if this is only allowed for VoIP providing apps. Does anyone know if Apple will accept my app to be published to their AppStore if I use the PushKit for only text messaging?
The untimate question, how can Whatsapp achieve this? Does it use PushKit as well?
