Call method from PresentingViewController after segue pop over - ios

Question

I have two view controllers in my project ViewController and SecondViewController and my ViewController has a button which performs a popover segue to SecondViewController then in my SecondViewController I have a button which I would like to use to a call a method from ViewController and I assumed it was possible using [self presentingViewController] but that pointer is set to nil so I'm not quite sure how to call a method in the first ViewController inside the SecondViewController after a popover segue.
This is the code for my ViewController.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
- (IBAction)dosegue:(id)sender;
-(void)tobecalledfromseguepopover;
#end
ViewController.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
}
-(void)tobecalledfromseguepopover{
NSLog(#"Called from segue popover");
}
- (IBAction)dosegue:(id)sender {
[self performSegueWithIdentifier:#"segueforpopup" sender:self];
}
#end
SecondViewController.h
#import <UIKit/UIKit.h>
#import "ViewController.h"
#interface SecondViewController : UIViewController
- (IBAction)returntocaller:(id)sender;
#end
SecondViewController.m
#import "SecondViewController.h"
#interface SecondViewController()
#end
#implementation SecondViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (IBAction)returntocaller:(id)sender {
[self dismissViewControllerAnimated:YES completion:^{
ViewController* caller = (ViewController*)[self presentingViewController];
if(caller!=nil){
[caller tobecalledfromseguepopover];
}else{
NSLog(#"nil");
}
}];
}
#end
My UI
So any ideas on how I can call tobecalledfromseguepopover inside SecondViewController after the segue? Also is there a way for SecondViewCOntroller to know it's being called from a segue popover?

Answer 1

The usual thing is a delegate architecture. Give the popover a delegate property and set it to self in your prepareForSegue. Now the popover knows where to find the first view controller.
This is often combined with a protocol so that the popover knows the name of the method to be called without worrying about the class of the first view controller, but that part isn’t crucial, especially in Objective C.