Property nil when using delegate to pass data back to VC - ios

Question

I've got a view in a xib file that I load to my viewController - its a temp view and thus isn't on screen all the time. However the temp view and the main view, use the same view controller class as they both are doing the same job.
Now, in the xib view I load up a second viewControoler - lets call it viewControllerB - which is a UITableView with 197 cells. Once a cell is selected, the view is dismissed and the value of the cell is returned to viewControllerA.
viewControllerB is on the storyboard.
Here is the code I have used:
viewControllerB (The VC I need data back from)
Delegate Protocol:
#protocol CountrySelectedDelegate <NSObject>
-(void)selectedCountry: (id)countryReturned;
#end
#property (strong, nonatomic) id <CountrySelectedDelegate> myDelegate;
Then in the .m file:
Set the delegate:
ViewControllerA *viewA = [[ViewControllerA alloc]init];
self.myDelegate = viewA;
Then I call the delegate in the same file;
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[[self myDelegate] selectedCountry:indexPath.row];
[self dismissViewControllerAnimated:YES completion:nil];
}
Now in viewControllerA:
pragma mark - CountrySelected Delegate
-(void)selectedCountry:(id)countryReturned
{
self.testInt = countryReturned;
}
Now this method does get called by the delegate. Looking in the console: countryReturned is the correct value. Once this method has finished, self.testInt is also the correct value.
Then, in my viewWillAppear method, I simply check the value again to see if its still the same with a NSLog print.
the value is always nil in the viewWillAppear method (Or anywhere else I check it) - I have tried with NSMutableString and NSString - always nil.
Why are my properties / instance variables getting set to nil?
Update:
This is how I show viewControllerB
- (IBAction)countrySelect:(UIButton *)sender
{
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
UITableViewController *vc = [sb instantiateViewControllerWithIdentifier:#"CountrySelection"];
vc.modalTransitionStyle = UINavigationControllerOperationPop;
[self presentViewController:vc animated:YES completion:NULL];
}

Answer 1

On ViewB do the below I guess you have already done
#protocol CountrySelectedDelegate <NSObject>
-(void)selectedCountry: (NSInteger)countryReturned;
#end
#property (week, nonatomic) id <CountrySelectedDelegate> myDelegate;
and in didSelectRowAtIndexPath
if ([[self myDelegate] respondsToSelector:#selector(selectedCountry:)])
{
[[self myDelegate] selectedCountry:indexPath.row];
}
On ViewA
Conform the protocol
#interface ViewA : UIViewController < CountrySelectedDelegate >
create the call ViewB
ViewB *viewBObjc=[[ViewB alloc] init];
[viewBObjc setMyDelegate:self];
[[self navigationController] presentViewController:ViewB animated:YES completion:Nil];
implement the delegate on ViewA
-(void)selectedCountry: (NSInteger)countryReturned
{
NSLog(#"Country Id is :%d", countryReturned);
}

Answer 2

Try this,
Set delegate by
//in ViewControllerB
self.myDelegate = [self parentViewController];
or
- (IBAction)countrySelect:(UIButton *)sender
{
UIStoryboard *sb = [UIStoryboard storyboardWithName:#"Main_iPhone" bundle:nil];
ViewControllerB *vc = (ViewControllerB *)[sb instantiateViewControllerWithIdentifier:#"CountrySelection"];
vc.modalTransitionStyle = UINavigationControllerOperationPop;
vc. myDelegate = self;
[self presentViewController:vc animated:YES completion:NULL];
}