location of objects in class

my class have these objects :

NSString *first;
NSString *last;
NSString *address;
NSInteger num;
NSString *gender;

I want to define an array which has the location of these objects, which I can modify the locations later and also I want to be开发者_StackOverflow able to search for specific object, also I want to be able to modify the values in the array if there where changes in the class objects.

Thanks