UITableViewController --> UIViewController Pushing Data Issues

Question

I am trying to push data to a UIViewController from a UITableViewController. When the user presses a climb it is going to push to the UIViewController and display 3 different specs in 3 labels which I have placed on my UIViewController. It is pushing to the detail view, but is not displaying any information. I will post my code:

FourthTableViewController.h

#import <UIKit/UIKit.h>

@interface FourthTableViewController : UITableViewController

@property (nonatomic, strong) NSString *sectionName;

@end

FourthTableViewController.m

#import "FourthTableViewController.h"
#import "DetailViewController.h"

@interface FourthTableViewController ()

@end

@implementation FourthTableViewController
{
NSArray *climbs;
}

- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

//populating arrays
NSDictionary *dict = @{@"Alabama Section 1":@[@"Alabama Climb 1", @"Alabama Climb 2", @"Alabama   
Climb 3"], @"Georgia Section 1": @[@"Georgia Climb 1", @"Georgia Climb 2", @"Georgia Climb 3"], 
@"Tennessee Section 1":@[@"Tennessee Climb 1", @"Tennessee Climb 2", @"Tennessee Climb 3"], 
@"Colorado Section 1":@[@"Colorado Climb 1", @"Colorado Climb 2", @"Colorado Climb 3"]};

climbs = dict[self.sectionName];

}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return climbs.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"ClimbCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

//if cell doesn't have anything in it, creates a new one
if(cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}

cell.textLabel.text = climbs[indexPath.row];
cell.textLabel.font = [UIFont fontWithName:@"Chalkduster" size:17];

return cell;
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:@"ShowDetails"])
{
    DetailViewController *detailViewController = [segue destinationViewController];
    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

    int row = [indexPath row];
}

}

DetailViewController.h

#import <UIKit/UIKit.h>

@interface DetailViewController : UIViewController
{
IBOutlet UILabel *Type;
IBOutlet UILabel *Coordinates;
IBOutlet UILabel *Grade;
}

@property (strong, nonatomic) NSString *detailLabelContents;
@property (weak, nonatomic) IBOutlet UILabel *detailLabel;

@property (nonatomic, strong) NSString *climbName;

@end

DetailViewController.m

#import "DetailViewController.h"
#import "FourthTableViewController.h"

@interface DetailViewController ()

@end

@implementation DetailViewController
{
NSArray *specs;
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.

//populating arrays
NSDictionary *dict = @{@"Alabama Climb 1":@[@"Alabama Spec 1", @"Alabama Spec 2", @"Alabama Spec 
3"], @"Georgia Climb 1": @[@"Georgia Spec 1", @"Georgia Spec 2", @"Georgia Spec 3"], @"Tennessee 
Climb 1":@[@"Tennessee Spec 1", @"Tennessee Spec 2", @"Tennessee Spec 3"], @"Colorado Climb 
1":@[@"Colorado Spec 1", @"Colorado Spec 2", @"Colorado Spec 3"]};

specs = dict[self.climbName];

self.detailLabel.text = self.detailLabelContents;

if ([_climbName isEqualToString:@"Alabama Climb 1"])
{
    Type.text = @"Really Hard";
    Coordinates.text = @"10.32145, -83.498621";
    Grade.text = @"V10";
}
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

I know that my issue is in my segue, but am unsure of how to get the information from my if statement to push to the detail view to the 3 labels.

I am not looking for someone to hold my hand and tell me the answer, just some proper guidance and constructive criticism.

Thanks

Answer 1

if you want to set data in your destination view controller (the controller you are pushing) you use the prepareForSegue method like this:

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"ShowDetails"]){
        UIViewController *vc = [segue destinationViewController];

        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

        int row = [indexPath row];

        vc.climbName = ...;
        vc. detailLabelContents = ...;
    }
}

most likely you will have to cast the destinationViewController to the ViewController class you are using e.g. DetailViewController *vc = (DetailViewController*)[segue destinationViewController]; then just set what ever property you want to store your data in. With the NSIndexPath you can access your local data just like you would in cellForRowAtIndexPath