Obj-C / Using MapKitView and TableView together with delegation - objective-c

Question

I am a very beginner of objective c and I wanted to create a scene about using 2 child view controller in a master view controller which includes MapKit and TableView. I ve searched it on internet for 1 day and but I couldn't make any of solutions since I failed in different steps of each suggestions. I know that there are a lot of way to pass data between View Controllers and I thought the best way is using delegation logic in this situation. (let me know if I am wrong please). By the way, I can update or move the cursor onto specific location WHEN I set a dummy button on MapKitViewController, so MapKit part is not where I am failing at. I am pretty sure that the problem is about communication between 2 View Controllers which are active at the same time.
Problem:
Updating MapView by clicking a table row of TableView which includes location coordinate detail. Both children view are set on a MasterViewController by 2 container views.
Tried so far:
Created a method "goToLocation:(Location*) location" in MapViewController and sent parameters to this method from TableViewController. =>(Lat and Long parameters received by goToLocation() but MapKitView doesn't get updated)
Tried to create a delegate logic between MapView and TableView.=>(Probably I couldn't create it properly. Please see below)
What I want :
I want to know what part I am doing wrong. Is there a easy or proper way to achieve that ?
TableViewController.h
#class TableViewController; //define class
#protocol TableViewDelegate <NSObject> //define delegate protocol
//define delegate method to be implemented within another class
- (void) locationSelected: (TableViewController *) sender object:(Location *) location;
#end
#property (nonatomic, weak) id <TableViewDelegate> delegate; //define TableViewVCDelegate as delegate
TableViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[self notifyNow:[_locations objectAtIndex:indexPath.row]];
}
- (void) notifyNow:(Location *) location {
//this will call the method implemented in your other class
[self.delegate locationSelected:self object:(Location *) location];
NSLog(#"Selected: %#",[location name]);
}
MapViewController.h
//make it a delegate for TableViewVCDelegate
#interface MapViewController : UIViewController <TableViewDelegate>
MapViewController.m
- (void)viewDidLoad {
_tableViewController = [[TableViewController alloc]init];
_tableViewController.delegate = self; //set its delegate to self somewhere
}
!!_ This Method Doesn't Get Triggered _!!
- (void)locationSelected:(TableViewController *)sender object:(Location *)location {
NSLog(#"%# is great!", [location name]);
}
MainViewController.m (Master/Root View Controller)
#import "MainViewController.h"
#import "MapViewController.h"
#import "TableViewController.h"
#interface MainViewController ()
#property (strong, nonatomic) IBOutlet UIView *topCont;
#property (strong, nonatomic) IBOutlet UIView *bottomCont;
#property (strong, nonatomic) IBOutlet UIView *safeArea;
#end
#implementation MainViewController
MapViewController *mapViewVC;
TableViewController *tableViewVC;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self.navigationController setNavigationBarHidden:YES animated:YES];
tableViewVC = [self.storyboard instantiateViewControllerWithIdentifier:#"TableViewController"];
mapViewVC = [self.storyboard instantiateViewControllerWithIdentifier:#"TopChildVC"];
[self addChildViewController:tableViewVC];
[tableViewVC.view setFrame:CGRectMake(0.0f,
0.0f,
self.safeArea.frame.size.width,
self.safeArea.frame.size.height/2)];
[self.bottomCont addSubview:tableViewVC.view];
[tableViewVC didMoveToParentViewController:self];
[self addChildViewController:mapViewVC];
[mapViewVC.view setFrame:CGRectMake(0.0f,
0.0f,
self.safeArea.frame.size.width,
self.safeArea.frame.size.height/2)];
[self.topCont addSubview:mapViewVC.view];
[mapViewVC didMoveToParentViewController:self];
}
#end