iOS method in data controller isn't being called - ios

Question

I am trying to call a method in my data controller object to load the data for my application, but for some reason it is not being called. Below is what I have done to initialize it. Any help would be greatly appreciated.
ViewController:
header file:
#import <UIKit/UIKit.h>
#class DetailViewController;
#class DataController;
#import <CoreData/CoreData.h>
#import "JointCAD.h"
#interface TableViewController : UITableViewController {
}
#property (nonatomic, assign) DataController *dataController;
#end
implementation file:
#import "TableViewController.h"
#import "DataController.h"
#implementation TableViewController
#synthesize dataController;
- (void)viewDidLoad {
[dataController refreshData];
}
#end
Data Controller:
header file:
#import <Foundation/Foundation.h>
#import "JointCAD.h"
#import "JointCADXMLParser.h"
#import "TFHpple.h"
#interface DataController : NSObject {
TFHpple *xpathParser;
}
- (void)refreshData;
- (void)initXMLParser;
- (void)noCallsMessage;
- (void)noInternetMessage;
#end
implementation file:
#import "DataController.h"
#implementation DataController
XMLParser *xmlParser;
- (void)refreshData {
NSLog("Some Method");
}

Answer 1

Is 'dataController' Object being set by some other class? - I believe that's why you have set it as a property? Right?
If No, then Remove the property,#synthesize of 'dataController' and try simple allocation of your 'dataController' object and then try calling your method.
Hope it helps.

Answer 2

You either need to initialize "DataController" prior to actually calling one of it's methods, or you need to make the method, "refreshData" a class by changing it's "-" to a "+".
If you need an instance callback instead. You need to rewrite "viewDidLoad" like this:
- (void)viewDidLoad {
DataController *dataController = [[DataController alloc] init];
[dataController refreshData];
}
And get rid of the property declaration of dataController because you haven't initialized it. If you would prefer a property declaration instead, simply allocate the viewcontroller prior to calling a function from it.
- (void)viewDidLoad {
dataController = [[DataController alloc] init];
[dataController refreshData];
}
One last thing to note is that I (and probably Ray) assume that you're using a storyboard configuration. If you are using a xib configuration, you need to add initWithNibName: to each initialization of the view controller.
I hope that's helpful!