Instance of a class that I don't inherit from in Objective C

Question

How can I create an Instance of a Class that I do not inherit from and override functions for it?

I Have I class called GetData and a viewController called SocialViewController.

@interface GetData : NSObject<NSURLConnectionDelegate> and

@interface SocialViewController:  UITableViewController<UITableViewDataSource>

Every time I try to create a instance of GetData in my SocialViewController implementation and override the functions it doesn't work and the functions in GetData are executed instead.

How can I create a instance of GetData in SocialViewController when SocialViewController inherits from UITableViewControler and not GetData?

@implementation SocialViewController

GetData myGetData;

- (void)viewDidLoad {
    [super viewDidLoad];
    myGetData = [GetData alloc];

    NSString someString = @"my init string"

    [myGetData initWithValue:someString];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    //The method that I'm trying to override 
}

Answer 1

You need to create a class which is a subclass of GetData in order to override methods. So more like:

@interface MyGetData : GetData @end
@implementation MyGetData

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
    //The method that I'm trying to override 
}

@end


@implementation SocialViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString someString = @"my init string";

    myGetData = [[MyGetData alloc] initWithValue:someString;
}