[Syphor]

How can i use a variable (NSString) "bam" from a different implementation called "bang"???

I tried something like this:

Code:
NSString *bam = [[NSString alloc] initWithFormat:@"bam - %@", bang.bam];

But no such luck. an anyone help me?

[Ibson]

What exactly is this "implementation" of bang? An instance, a method, a class? You could declare it as a static variable, an external variable, it all depends on what you want to do.

[tobli]

I guess you mean from a different object (or instance), not implementation. Anyway, the correct object oriented solution is to write an accessor method and use, in this case, [bang bam] to access the bam variable. The accessor is in most cases trivial, just:
- (<variable type>)bam
{
return bam;
}

Another way of accessing the variable is to use the -> operator. The . operator (that you used in your code) won't work since Cocoa always uses pointers to objects. That said, never ever use this method, always use accessors.

Hope this helps

[Ibson]

OK, I think what you're asking is that you have an instance of an object called "bang" that you want to access that ivar "bam" from in that case you need...accessor methods!
Add this method to your "Bang" class (class names should be capitalized):

Code:
- (NSString *)bam
{
    return bam;
}

Then to access your string, call [bang bam]. As a side note, you don't actually need this. Instead of bang.bam, the correct way to write it is bang->bam, which accesses the bam ivar in the bang object. Don't get into the habit of this though; it's poor style and goes against the abstract OO concepts behind Objective-C.

[Ibson]

Ahh tobli bet me to it!