Dismiss modal, then immediately push view controller - ios

Question

How can I dismiss a modal and then immediately push another view?
I am adding this code in a didSelectRowAtIndexPath:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"Main" bundle:nil];
ChatTableViewController *chatVC = (ChatTableViewController*)[storyboard instantiateViewControllerWithIdentifier:#"chatVC"];
[self dismissViewControllerAnimated:YES completion:^{
[[self navigationController] pushViewController:chatVC animated:YES];
}];
The modal view dismisses, but nothing happens after. Any ideas?

Answer 1

You can't push a view controller into a view dismissed, if it's dismissed it disappears so it's not logical to push another view, cause the parent view controller is deleted. Probably you have this:
- ViewController 1 --> Modal ViewController 2 -->Wanted to dismiss VC2 and push VC3
What you have to do is
- ViewController 1 --> Modal ViewController 2 --> Dismiss VC2 --> Push VC3 on VC1
You can do it with notifications. The most efficient way is to use delegates, create a delegate on VC2 that notifies V1 when it dismisses and then just push VC3.

Answer 2

No, it cant be done that quickly as far as I know, you need to add a delay betwwn the dissmiss and the navigation of another controller, only then will it execute else it would crash an error saying, trying to push a controller while dismissing other

Answer 3

This answer tries to solve the original problem asked above.
A,B,C viewControllers. A is the root VC of a navigationController.
A-> modally_presents -> B-> dismissing_modally_prsented_B_and_automatically_pushing -> C
Note: All presentation and dismissals are done using segues.
I have marked important sequence of actions.
class CViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
}
/************************************************************/
protocol BDelegate: class {
func BDelegateFunc(someRandomString: String)
}
class BViewController: UIViewController {
weak var delegate: BDelegate?
var name: String?
override func viewDidLoad() {
super.viewDidLoad()
name = "swappy"
}
#IBAction func btnClicked(_ sender: Any) {
// 3 DISMISS using segue
performSegue(withIdentifier: "unwindToAViewController", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// 4
print(segue.identifier)
}
deinit {
// 6
print(String(describing: type(of: self)) + #function)
delegate?.BDelegateFunc(someRandomString: name!)
}
}
/************************************************************/
class AViewController: UIViewController, BDelegate {
override func viewDidLoad() {
super.viewDidLoad()
}
#IBAction func btnClicked(_ sender: Any) {
// 1 MODAL
performSegue(withIdentifier: "presentBFromA", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "presentBFromA" {
// 2
let vc = segue.destination as! BViewController
vc.delegate = self
} else if segue.identifier == "showCFromA" {
// 8 This will finally push C in navigationController
print(segue.identifier)
}
}
#IBAction func unwindToAViewController(segue: UIStoryboardSegue) {
// 5
print(#function)
}
func BDelegateFunc(someRandomString: String) {
// 7
print(someRandomString)
performSegue(withIdentifier: "showCFromA", sender: self)
}
}