如果没有Storyboard，如何初始化自定义ViewController？

Question

I do not have storyboard enabled. I am initializing the viewcontroller like so:

var customViewController = CustomViewController();

then doing this says customViewController is nil:

self.navigationController!.pushViewController(customViewController, animated: true)

Answer 1

I tried and succeeded

import Foundation
class MyCustomViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = UIColor.redColor()
    }
}

and push

var customViewController = MyCustomViewController()
self.navigationController?.pushViewController(customViewController, animated: true)

have anything in your CustomViewController ?