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Editorial Team
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Asked: 2026-06-09T20:10:40+00:00

I am working on a Iphone Application. I need to use C++ code inside

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I am working on a Iphone Application. I need to use C++ code inside MainViewController class. For that I renamed the MainViewController.m to MainViewController.mm in order to accept C++ code.

However after doing that it looks like it lost the link with the MainViewController.h file. I can no longer synthesize properties declared in the .h file and can no longer create action in the header file. It can’t find the .mm file. and if I try to “Jump to definition” it says Symbol not found

How can I fix that. Thank you for any help

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1 Answer

  1. Editorial Team

    Close and reopen the Xcode project

    if that fails, Build and remove any errors which may have been introduced as a result of changing the type to compile as.

    if that fails, Clean All and rebuild.

    if that fails, got to the Organizer, choose “Projects” > *YOUR_PROJECT* and Delete its Derived Data.

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