Also not to shabby:
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html
<https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html>
regards,
Lars
> Am 31.05.2020 um 22:32 schrieb Daniel Boyd <[email protected]>:
>
> I think this is a better intro guide:
>
> http://www.gnustep.org/resources/documentation/Developer/Base/ProgrammingManual/manual_1.html
>
> <http://www.gnustep.org/resources/documentation/Developer/Base/ProgrammingManual/manual_1.html>
>
> As for why your code isn’t compiling, tough to say without seeing hello.m,
> but couple thoughts: did you include
>
> #import <Object.h>
>
> And in your interface declaration, did you include the “ : Object” at the
> end: e.g.
>
> @interface Greeter : Object
>
> I haven’t used Object.h (I use Foundation.h as in the example I included).
> GNUStep objects are typically instantiated with [[obj alloc] init] rather
> than [obj new]
>
> Sent from my iPhone
>
>> On May 31, 2020, at 2:53 PM, Patrick Cardona via Discussion list for the
>> GNUstep programming environment <[email protected]> wrote:
>>
>> Hi All experienced Objective-C Dev
>>
>> I begun this Beginner Guide about Objective C :
>>
>> http://gnustep.made-it.com/BG-objc/
>>
>> But my beginning is not glorious...
>>
>> pi@raspberrypi:~/CoursObjectiveC $ ls
>> hello hello.m
>> pi@raspberrypi:~/CoursObjectiveC $ gcc -lobjc hello.m -o hello
>> hello.m: In function ‘main’:
>> hello.m:39:2: warning: ‘Greeter’ may not respond to ‘+new’
>> myGreeter=[Greeter new];
>> ^~~~~~~~~
>> hello.m:39:2: warning: (Messages without a matching method signature
>> hello.m:39:2: warning: will be assumed to return ‘id’ and accept
>> hello.m:39:2: warning: ‘...’ as arguments.)
>> hello.m:43:2: warning: no ‘-free’ method found
>> [myGreeter free];
>> ^
>> pi@raspberrypi:~/CoursObjectiveC $ ./hello
>> Erreur de segmentation
>>
>> Is this Beginner's Guide up to date ?
>>
>> Regards
>>
>> --
>> Bien cordialement,
>> Patrick CARDONA
>>
>>
