ios - 手动创建的 UIWindow 大小错误

Question

我正在学习如何在没有 Interface Builder 的情况下创建 iOS 应用程序(即 Storyboard、xibs 等)。下面是我正在使用的基本应用程序委托(delegate)类。问题是当显示 UIWindow 时，它没有用完设备的全屏(见附件截图)。这发生在我测试过的所有设备和模拟器上。为什么不使用全屏？

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
  lazy var window: UIWindow? = {
    debugPrint("AppDelegate: Creating Window")

    let screen: UIScreen = UIScreen.mainScreen()
    let window: UIWindow = UIWindow.init(frame: screen.bounds)

    window.backgroundColor = UIColor.whiteColor()

    return window
  }()

  lazy var rootViewController: ShapesViewController = {
    debugPrint("AppDelegate: Creating Root View Controller")

    let rootViewController = ShapesViewController.init(nibName: nil, bundle: nil)

    return rootViewController
  }()

  func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {
    debugPrint("AppDelegate: applicationWillEnterForeground")

    window?.rootViewController = rootViewController
    window?.makeKeyAndVisible()

    return true
  }
}

Answer 1

问题原来是我没有启动图像或 Storyboard。出于某种原因，如果没有这个，应用程序默认为 3.5"大小。归功于此评论:A launch storyboard or xib must be provided unless the app requires full screen