'NSInvalidArgumentException', reason: '-[UINavigationController setMed:]: unrecognized selector sent to instance 0x746dda0' - ios

Question

I am making an app that will help people with certain health conditions manage their medication. I have created a modal to add medication which works and saves the new medication using core data.
I am now trying to allow people to edit their medication after it has been saved. To do this I am trying to send a managed object of the medication to a "fibromappMedsEditViewController" and assign the information in the viewDidLoad method of the class.
I keep getting this error:
'NSInvalidArgumentException', reason: '-[UINavigationController setMed:]: unrecognized selector sent to instance 0x746dda0'
Could anybody tell me what I am doing wrong?
relevant methods in fibromappMedsListViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{ //selMed declared at top of file as NSManagedObject *selMed;
selMed = [self.meds objectAtIndex:indexPath.row];
NSLog(#"SELECTED MED: %#",[selMed valueForKey:#"name"] );
UIStoryboardSegue *segueString = [NSString stringWithFormat:#"%#",#"editMeds"];
NSLog(#"%#",segueString);
[self performSegueWithIdentifier:#"editMeds" sender:indexPath];
}
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
NSLog(#"%#",segue.destinationViewController);
NSLog(#"%#",[selMed valueForKey:#"name"] );
fibroMappMedsEditViewController *dest = segue.destinationViewController;
dest.med = selMed;
}
The fibroMappMedsEditViewController.h
#import <UIKit/UIKit.h>
#interface fibroMappMedsEditViewController : UITableViewController
- (IBAction)saveChanges:(id)sender;
- (IBAction)deleteBtnPressed:(id)sender;
- (IBAction)dosageChanged:(id)sender;
- (IBAction)maxDosageChanged:(id)sender;
- (IBAction)cancel:(id)sender;
- (IBAction)typeChanged:(id)sender;
#property (weak, nonatomic) IBOutlet UITextField *tbName;
#property (weak, nonatomic) IBOutlet UITextField *tbDose;
#property (weak, nonatomic) IBOutlet UITextField *tbMaxDose;
#property (weak, nonatomic) IBOutlet UITextField *tbType;
#property (weak, nonatomic) IBOutlet UIStepper *stepperDose;
#property (weak, nonatomic) IBOutlet UIStepper *stepperMaxDose;
#property (weak, nonatomic) IBOutlet UISegmentedControl *changeMeasure;
#property (strong, nonatomic) NSManagedObject *med;
#end
The fibroMappMedsEditViewController.m - just the parts I altered that affect the way the controller loads
#import "fibroMappMedsEditViewController.h"
#import "fibroMappAppDelegate.h"
#import <CoreData/CoreData.h>
#interface fibroMappMedsEditViewController ()
#end
#implementation fibroMappMedsEditViewController
#synthesize tbName;
#synthesize tbDose;
#synthesize tbMaxDose;
#synthesize tbType;
#synthesize med;
double dose;
double maxDose;
- (void)viewDidLoad
{
[super viewDidLoad];
tbName.text = [med valueForKey:#"name"];//name is a string in the model
tbDose.text = [med valueForKey:#"dose"];//dose is a double in the model
tbMaxDose.text = [med valueForKey:#"maxDose"];//maxDose is a double in the model
tbType.text = [med valueForKey:#"type"];//type is a string in the model
}
If you need to see anything else please just ask.
Also, I am using storyboards for this app.

Answer 1

It appears from that log, that your fibroMappMedsEditViewController (which should start with a capital letter BTW) is embedded in a navigation controller. You need to get to that navigation controller's root view controller.
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
UINavigationController *nav = segue.destinationViewController;
fibroMappMedsEditViewController *dest = (fibroMappMedsEditViewController *)nav.topViewController;
dest.med = selMed;
}