Re: subclass overwriting superclass ivar
Re: subclass overwriting superclass ivar
- Subject: Re: subclass overwriting superclass ivar
- From: "email@hidden" <email@hidden>
- Date: Thu, 27 May 2010 15:08:35 +0100
On 27 May 2010, at 14:42, Jean-Daniel Dupas wrote:
>>
>>
>> Is there no build support to help with these sorts of class dependencies?
>> Or have I borked my build settings somewhere?
>
>
> If MGS_B is a subclass of MGS_A , it must import the MGS_A header file (else the compiler will complain).
> If you touch a header file, all files that include it should be automatically rebuild on the next build, else this is a bug in Xcode that failed to properly resolve file dependencies.
>
> If you manage to reproduce the issue, fill a radar.
>
> WFIW, a known case where Xcode failed to properly compute dependencies is when you import your header using a macro
>
> #define MYHEADER(header) <Framework/header.h>
>
> #include MYHEADER(MGS_A.h)
>
This was the source of the problem.
While refactoring I had inserted the import statement for MGS_A in a convenience header along with several others.
This convenience header was then imported into MGS_B.h.
The compiler did not complain but it obviously affected the build system as MGS_B did not get rebuilt.
Importing the subclass header directly into MGS_B.h gives the desired behaviour.
Regards
Jonathan Mitchell
Developer
Mugginsoft LLP
http://www.mugginsoft.com_______________________________________________
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