Different Facebook accounts Objective-C -

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i start integration of facebook on iphone app.

i can log , profile picture , name, when try switch account (not developer account), error :

fbloginview encountered error=error domain=com.facebook.sdk code=2 "the operation couldn’t completed. (com.facebook.sdk error 2.)"

i search on internet don't find solution, don't know how fix :/

thx !

[edit] : in fact, app on facebook developer account in 'sandbox mode' so, developers , testers launch app on iphone !!


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