Re: Unimplemented Selector Warning 3

Subject: Re: Unimplemented Selector Warning 3
From: "Gerriet M. Denkmann" <email@hidden>
Date: Tue, 21 Aug 2012 23:44:59 +0700

On 21 Aug 2012, at 22:07, Andy Lee <email@hidden> wrote:

On Aug 21, 2012, at 2:18 AM, Gerriet M. Denkmann <email@hidden> wrote:

(I hope you don't see this more than once - some problems with Mail)

I messed around with my Build Settings - activating more warnings. (Almost) always a good idea.

I have:
NSView *someSubclassOfView = ....;
if ( [ someSubclassOfView respondsToSelector: @selector(getRow:column:forPoint:) ] )
{
// this is a browser or a matrix or something else
// do something...
}

And get a warning: "Unimplemented selector 'getRow:column:forPoint:'".

What line is the warning coming from? If you are doing

   BOOL isOnCell = [someSubclassOfView getRow:&row
                                       column:&column
                                     forPoint:point];

The problem might be that someSubclassOfView is declared as an NSView. You can fix with a cast:

   BOOL isOnCell = [(NSTableView *)someSubclassOfView getRow:&row
                                                      column:&column
                                                    forPoint:point];

But when I do:

if ( [ (NSMatrix *)someSubclassOfView respondsToSelector: @selector(getRow:column:forPoint:) ] )

I get the same error message. Same with casting to NSTableView.

Same problem with:
#import "Server.h" // declares: - (void) reset;
[ currentServers makeObjectsPerformSelector: @selector(reset) ];

And:
#import "SomeClass.h" // declares: - (void) someMethod: something;
SomeClass *someClass = ...;
[ someClass performSelectorOnMainThread: @selector(someMethod:) withObject: nil waitUntilDone: NO ];

I don't know about these. Is the warning definitely coming from the performSelector lines?

Xcode highlights this line in yellow. And puts a warning triangle in front of it. So it seems like "Yes".

What are the warnings you activated? I can try to reproduce the problem.

I activated many. Tried to set them to "No" to get rid of the warnings, but no success.

Here some stuff which gets included:

ARCHS = $(ARCHS_STANDARD_64_BIT)

SDKROOT = macosx

VALID_ARCHS = i386 x86_64

COMBINE_HIDPI_IMAGES = YES

GCC_WARN_UNINITIALIZED_AUTOS = YES

CLANG_WARN__DUPLICATE_METHOD_MATCH = YES

CLANG_ANALYZER_SECURITY_FLOATLOOPCOUNTER = YES

CLANG_ANALYZER_SECURITY_INSECUREAPI_RAND = YES

CLANG_ANALYZER_SECURITY_INSECUREAPI_STRCPY = YES

GCC_WARN_FOUR_CHARACTER_CONSTANTS = YES

CLANG_WARN_IMPLICIT_SIGN_CONVERSION = YES

CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = YES

GCC_WARN_STRICT_SELECTOR_MATCH = YES

CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES

GCC_WARN_MULTIPLE_DEFINITION_TYPES_FOR_SELECTOR = YES

Kind regards,

Gerriet.

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References:
	>Unimplemented Selector Warning 3 (From: "Gerriet M. Denkmann" <email@hidden>)
	>Re: Unimplemented Selector Warning 3 (From: Andy Lee <email@hidden>)

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