手动创建的UIWindow是错误的大小

Question

我正在学习如何在没有Interface Builder(即故事板,xib等)的情况下创建iOS应用程序.下面是我正在使用的基本应用程序委托类.问题是,显示时UIWindow不会耗尽设备的全屏(参见附件截图).这发生在我测试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

问题是我没有发布图像或故事板.由于某些原因没有这个,应用程序默认为3.5"大小.相信此评论:必须提供启动故事板或xib,除非应用程序需要全屏

Answer 2

这总是对我有用（尽管我没有看到任何明显的区别）。您介意也分享您的 ShapesViewController 代码吗？

更新至swift 4.2

var window: UIWindow?

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    window = UIWindow(frame: UIScreen.main.bounds)
    window?.rootViewController = ViewController()
    window?.makeKeyAndVisible()
    return true
}