在App Delegate中管理两个故事板

Question

我决定避免使用自动布局,所以我正在尝试实现代码,以使我的应用程序根据屏幕大小管理两个不同的故事板.

我一直在关注这个教程:http://pinkstone.co.uk/how-to-load-a-different-storyboard-depending-on-screen-size-in-ios/

我在尝试将Objective C代码转换为Swift时遇到问题.

这是我目前在AppDelegate中的代码:

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

func grabStoryboard() -> UIStoryboard {
    var storyboard = UIStoryboard()
    var height = UIScreen.mainScreen().bounds.size.height

    if height == 480 {
        storyboard = UIStoryboard(name: "Main3.5", bundle: nil)
    } else {
        storyboard = UIStoryboard(name: "Main", bundle: nil)
    }
    return storyboard
}

func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
    // Override point for customization after application launch.   

    var storyboard: UIStoryboard = self.grabStoryboard()

    self.window?.rootViewController.storyboard.instantiateInitialViewController()
    self.window?.makeKeyAndVisible()

    return true
}

该应用程序运行,我没有错误,但无论我是在3.5英寸设备或4英寸设备上运行应用程序,我只是得到4英寸的故事板.

我哪里错了？

Answer 1

问题在于:

self.window?.rootViewController.storyboard.instantiateInitialViewController()

您应该使用此代替:

self.window?.rootViewController = storyboard.instantiateInitialViewController()

编辑:我已删除,as UIViewController因为不再需要它.