Pointers / Referencing

[EJDSlayer]

Hi Everyone,

I was wondering if anyone had any comprehensible guides on how to reference a pointer in Objective C / Xcode.

What I'm trying to do:

Say I have a class called Person which stores a name and ID. I have a list of these classes called personList, which contains 20 instances of Person. I then have a function called EditPerson(Person *) which takes in an individual Person for editing and stores them in editP.

How can I make the changes in editP overwrite the data in personList(i).

I can do this no problem in C++ using the following : editP = &personList(i). Is there anything similar I can use in Objective C?

Thanks,
Slayer

[Duncan C]

Originally Posted by EJDSlayer

Hi Everyone,

I was wondering if anyone had any comprehensible guides on how to reference a pointer in Objective C / Xcode.

What I'm trying to do:

Say I have a class called Person which stores a name and ID. I have a list of these classes called personList, which contains 20 instances of Person. I then have a function called EditPerson(Person *) which takes in an individual Person for editing and stores them in editP.

How can I make the changes in editP overwrite the data in personList(i).

I can do this no problem in C++ using the following : editP = &personList(i). Is there anything similar I can use in Objective C?

Thanks,
Slayer

The equivalent container object in Cocoa is an NSArray.

Look up NSArray and/or NSMutableArray.

An NSArray contains an ordered list of objects.

You'd get object i from an array with coe like this:

Person* editP;
editP = [personList objectAtIndex: i];