推送并呈现视图控制器

Question

I am using a Navigation Controller as a root View Controller and on starting the app a ViewController VC1 appears which has a button that on pressing (with the help of segue) takes you to VC2 which has a table view and 5 cells, Now I Want to use push instead of Segue or present a modal for going to VC3 from VC2 (on click of cells).

I have used

let displayVC : ForWebViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ForWebViewController") as! ForWebViewController


self.navigationController?.pushViewController(displayVC, animated: false)

The code has been placed under the action of 1st cell's click but nothing happens.
Can anyone help

Answer 1

以编程方式添加导航控制器

let navController = UINavigationController.init(rootViewController: VC2)

Answer 2

• make sure you have a navigationController
• make sure the displayVC is properly instantiated

---

let displayVC : ForWebViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ForWebViewController") as! ForWebViewController

present(displayVC, animated: true, completion: nil)

or

navigationController?.pushViewController(displayVC, animated: true)

Answer 3

objective C:

PulseNavigationController * VC3 =(PulseNavigationController*)navigationcontroller;

[homeNavictrl pushViewController:VC3 animated:YES];

swift:

let VC3 = NewViewController()

self.navigationController?.pushViewController(VC3, animated: true)

Answer 4

Use this code and your storyboard ID

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    print(indexPath.section, indexPath.row)//It will print index and section
    let hvc = self.storyboard?.instantiateViewController(withIdentifier: "Your Storyboard ID") as! ForWebViewController//Here replace your class name
    self.navigationController?.pushViewController(hvc, animated: true)
}

Answer 5

There might be one of the possible things because of which you are facing the issue. Do check the below points:

1. Have you set the delegate of tableView to VC2 . You can do it in the storyboard itself or in viewDidLoad() of VC2 , write the below code:

self.tableView.delegate = self

2. Check if the navigationController instance is not nil in the below code:

self.navigationController?.pushViewController(displayVC, animated: false)