How to check whether session live or expired in Quickblox iOS SDK?

问题

I know that, any session will be expired after last request (made before 2 hours) to the Quickblox server. When I create a session, I'm able to find [QBBaseModule sharedModule].tokenExpirationDate but I'm not sure how it works and how should I check for whether session is live or expired?

1. How to check whether session is live or expired?

2. If I create a session, I'll get [QBBaseModule sharedModule].tokenExpirationDate for next 2 hours, now within an hour I'll made a request to the server, would it update [QBBaseModule sharedModule].tokenExpirationDate date too?

回答1:

1. By checking tokenExpirationDate.
2. tokenExpirationDate is updated in every response from QuickBlox. So answer is - yes.

来源：https://stackoverflow.com/questions/27074234/how-to-check-whether-session-live-or-expired-in-quickblox-ios-sdk