Method in Date extension not found in one class while works in another

Question

I've a small extension for the Date type with some simple helper methods like

    func dateByAdding(components: DateComponents) -> Date?
    {
        return Calendar.current.date(byAdding: components, to: self)
    }

Now there's one class where Xcode 13.0 beta 2 keeps telling me Type 'Date' has no member 'dateByAdding' while in another class the extension works as expected.

All files are 100% swift and all relevant files have a Target Membership of the same target.

I've tried the usual things like removing the Derived Data folder, but without success. Any ideas what could cause this?

796

Posted by

just.do.it

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Answer 1

Did you do the option-clean build folder ?

Where is the extension defined ? In which file ? Is in in the another class the extension works as expected

If so, try to define outside of any class.

Posted by

Claude31

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Answer 2

If I press ⌥, "Clean Build Folder" becomes disabled. Is there still a difference in current Xcode versions?

The extension is defined in its own file.

Posted by

just.do.it

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Answer 3

Exact, I did not notice option-clean was now disabled. Just use Clean Build Folder.

Could you show the 2 class definitions and post a screen copy of the Identity and type Inspector info for the files of the 2 classes ?

Posted by

Claude31

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Answer 4

This seems to be an issue with Xcode 12 beta 2. I opened the project in Xcode 12.5.1 and was able to use the methods in the Date Extension without any problem and compile the project.

Now also in Xcode 13 beta 2 the Date Extension is found in this class and I can use the methods from it.

Posted by

just.do.it

May be opening the project in 12.5 did correct some issue. And then reopening in 13.0 worked ?

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Claude31

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Method in Date extension not found in one class while works in another

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