facebook - How does an iOS app keep a FBSession from expiring? -

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i have read fbsession automatically renews/refreshes it's token, looking through sdk time seems extend life of token when session open request returns new token expiration.

will session/token renewed result of other actions?

edit: in 'facebook' class there 'extendaccesstoken' method following comment:

/** * attempt extend access token. * * access tokens typically expire within 30-60 days. when user uses * app, app should periodically try obtain new access token. once * access token has expired, app can no longer renew it. app has * ask user re-authorize obtain new access token. * * ensure app has fresh access token active users, it's * recommended call extendaccesstokenifneeded in application's * applicationdidbecomeactive: uiapplicationdelegate method. */

but method seems separate fbsession.

by using fbsession token, token extended automatically newest sdk: https://github.com/facebook/facebook-ios-sdk/blob/master/src/fbsession.m#l236-l260


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