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Home/ Questions/Q 3664660
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Editorial Team
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Editorial Team
Asked: May 19, 20262026-05-19T01:40:19+00:00 2026-05-19T01:40:19+00:00

When I run my application i got this I see in my console this

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When I run my application i got this
I see in my console this message “Unknown class FirstViewController in Interface Builder file.”

I am running TabBar application.

How can I fix this?

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  1. Editorial Team
    Editorial Team
    2026-05-19T01:40:19+00:00Added an answer on May 19, 2026 at 1:40 am

    It looks like you deleted FirstViewController.h & .m from project, but forgot to change view controller’s class in nib file.

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