05-15-2009, 09:00 AM

I am having a really hard time moving to objective-c /cocoa in terms of the .h and .m files.

I understand what they are, but I don't get what goes where.

My biggest issues right now is

how can I internalize variables for use inside a specific function

PHP Code:

-(void)afunctionImade{
var1 = 1;

var2 = 5;


var3 = var1 + var2;
return var3;
} 


if i try to build and go on this i get the error

"var1 undeclared (first use in this function)"
and so on for each variable.

I ONLY want to use those vars inside of that exact function, I don't want them to be accessed anywhere else. Why do I have to declare it somewhere? Or how do i declare it so that is it only used inside that function?

Thanks in advance,
Chris

05-15-2009, 09:26 AM

It doesn't look as though you've defined an object type for your variables...
You'd need to write:

int var1 = 1;

(Unlike PHP, you can't use variables without types like that in Objective-C - or many other languages).

Once declared, you can access the variable directly:

var1 = 5*12;

05-15-2009, 12:55 PM

To add to what Aptmunich said, your problem here seems to have been more of a lack of understanding of the C language rather than with Objective-C. You may want to take a step back and find some C language tutorials or books to dive into and gain an understanding of before you start adding Objective-C's extensions to the mix.