ios - 在 AppDelegate 中实例化 UINavigationController

Question

我正在尝试在我的 AppDelegate 中用 rootViewController 实例化一个 UINavigationController。我看过这个网站，但所有示例都来自 Objective-C 或使用的 Storyboard(我正试图摆脱)。 “HomeScreenController”是应用程序的 Root View 。

编辑:这显示在控制台中

2015-07-18 14:42:25.376 FastFactsSwift[4749:343495] Failed to instantiate the default view controller for UIMainStoryboardFile 'Main' 
- perhaps the designated entry point is not set?

我该如何解决这个问题？

---

以下代码只会导致黑屏:

AppDelegate.swift:

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?


func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    // Override point for customization after application launch.

    self.window?.rootViewController = UINavigationController(rootViewController: HomeScreenController())

    return true
}
...

HomeScreenController.swift:

import UIKit

class HomeScreenController: UIViewController, UISearchBarDelegate, UITableViewDelegate{
    override func viewDidLoad(){

        super.viewDidLoad()

        var width = self.view.viewWidth
        var height = self.view.viewHeight

        //Add stuff to the view
}
...

为什么 HomeScreenController 显示为黑屏？

Answer 1

问题不是将 AppDelegate 配置为不使用 Storyboard。

How do I create a new Swift project without using Storyboards?