How can i pass object as parameter from a class to another class?

Question

i have three classes.. say one two three.. now i have an object of class one.. i want to pass that object from class two to class three as a parameter by calling a method which is in class three.

what all steps to be taken and kindly explain with examples ..

I’m not really sure what you are up to. Chances are that you would like to do something as asked in [this question](http://stackoverflow.com/questions/4924350)? — zoul, Feb 11 '11 at 10:37
Can I respectfully suggest that if you want to learn objective-c, you attempt to actually learn objective-c (plenty of books and internet sites to help you with that) instead of asking a question of the form "How do I do a very fundamental basic thing in language X". Then attempt to do something with your new-found knowledge, and ask questions if you run into difficulties with the basics. — occulus, Mar 01 '11 at 12:27

score 1 · Answer 1 · edited Feb 12 '11 at 04:51

Is this what you're after?

In your Class2 header declare a method that returns a Class1 pointer.

- (Class1*)objectOfClass1;

Implement Class2,

- (Class1*)objectOfClass1 {return [[Class1 alloc] autorelease];}

In your Class3 header declare a method that accepts an argument of pointer to Class1:

-(void) doSomething:(Class1 *)obj;

Class3 source, implement your logic:

-(void) doSomething:(Class1 *)obj {
    // Use your Class1 object here.
}

And you would call it on Class2 like this:

Class1 *obj1; //Object of class one
Class2 *obj2 = [[Class2 alloc] autorelease]; //object of class two
Class3 *obj3 = [[Class3 alloc] autorelease]; //object of class three

obj1 = [obj2 objectOfClass1]; //retrieve object of class one from object of class two 

[obj3 doSomething:obj1]; //pass object of class one into object of class three

Anyway, I recommend that you take a look at this simple tutorial: Learning Objective-C: A Primer

How can i pass object as parameter from a class to another class?

1 Answers1