Issue with self.navigationController and pushViewController - objective-c

Question

I am having trouble pushing from a tableview to a detail view. When I click the tableview cell, the cell highlights but does not push to the detail view. I am using this to transition to the detail view:
[self.navigationController pushViewController:detailViewController animated:YES];
I have read that this is a common issue, but am somehow unable to figure out a solution. My full .m file is below. If anyone has any recommendations that would be amazing. Thank you!
#import "ViewController.h"
#import "DetailViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = #"title";
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *url = [NSURL URLWithString:#"http://website.com/json.php"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
news = [NSJSONSerialization JSONObjectWithData:data options:nil error:nil];
[mainTableView reloadData];
}
- (int)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [news count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"MainCell"];
if(cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"MainCell"];
}
cell.textLabel.text = textForMyLabel;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle: #"Back" style: UIBarButtonItemStyleBordered target: nil action: nil];
[[self navigationItem] setBackBarButtonItem: newBackButton];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
detailViewController.title = [[news objectAtIndex:indexPath.row] objectForKey:#"name"];
detailViewController.newsArticle = [news objectAtIndex:indexPath.row];
[self.navigationController pushViewController:detailViewController animated:YES];
}

Answer 1

you try:
[self presentModalViewController: detailViewController animated:YES];

Answer 2

You can perform push oly with a UINavigationController, the above code will work if your Controller is UINavigationController. Since your trying to integrate two projects just check whether the RootViewController is a UINavigationController.