后退按钮显示然后迅速消失

Question

Issue : Upon displaying the second view, the Back button shows and then quickly disappears.
I'd like the Back button to persist on the second view.

Setup: 2 views.
The button that opens the second view is done via a "Show" segue.

SecondVC:

override func viewDidAppear(_ animated: Bool) {
        let controller = TipJarViewController<TipJarOptions>()
        self.present(controller, animated: false, completion: nil)
}

It seems to happen because of how I'm doing the viewDidAppear . It seems that I'm replacing the entire view with the self.present . I'm not sure what to search for or modify so it can still show the Back button.

Bonus question: Wondering if I'm placing this code in the wrong section. On the transition to the second view the screen is blank for a bit and then will show the view's contents. This doesn't seem like an optimal user experience. Open to any suggestions here.

After moving present to first VC via Frankenstein's suggestion

Answer 1

You don't need to segue into the second controller and then present. Instead, present directly instead of show the controller keeping it as rootViewController of a UINavigationController . Do this on the action:

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)

    let controller = UINavigationController(rootViewController: 
    TipJarViewController<TipJarOptions>())
    present(controller, animated: false, completion: nil)
}

Edit: To add back button in TipJarViewController , here is the code:

override func viewDidLoad() {
    super.viewDidLoad()

    navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Back", style: .plain, target: self, action: #selector(handleBack))
}

@objc func handleBack() {
    dismiss(animated: true)
}