如何使用 Sprite Kit 更改背景颜色

Question

我正在尝试在 Swift 中使用 Sprite Kit 制作游戏，但背景颜色有点问题。

我在 Xcode 上开始了一个新项目，并选择了“游戏”预设和 Sprite Kit。 所以我有一个灰色背景的启动项目，白色的“Hello World”和当我按下屏幕时出现的宇宙飞船。

所以我删除了所有我不关心的代码，但是当我启动游戏时，我仍然有灰色背景，即使我尝试在 GameScene.swift 文件中更改它。

这是我的文件：

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.
    return true
  }

func applicationWillResignActive(application: UIApplication) {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
  }

func applicationDidEnterBackground(application: UIApplication) {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
  }

func applicationWillEnterForeground(application: UIApplication) {
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
  }

func applicationDidBecomeActive(application: UIApplication) {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
  }

func applicationWillTerminate(application: UIApplication) {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
  }

}

GameScene.swift

import SpriteKit

class GameScene: SKScene
{
  override func didMoveToView(view: SKView)
  {
    self.backgroundColor = SKColor.whiteColor()
  }

  override func update(currentTime: CFTimeInterval)
  {
    /* Called before each frame is rendered */
  }
}

GameViwController.swift

import UIKit
import SpriteKit


class GameViewController: UIViewController
{

  override func viewDidLoad()
  {
    super.viewDidLoad()
  }

  override func prefersStatusBarHidden() -> Bool
  {
    return true
  }
}

那么如何设置背景为白色呢？

Answer 1

如果GameScene 没有被GameViewController 加载，它不会改变，因为你试图改变背景颜色，因为你删除了那个代码。

所以将此代码添加到您的GameViewController.swift：

override func viewDidLoad() {
    super.viewDidLoad()

    // load your GameScene
    let scene = GameScene(size: view.bounds.size)
    let skView = view as! SKView
    skView.showsFPS = false
    skView.showsNodeCount = false
    skView.ignoresSiblingOrder = true
    scene.scaleMode = .ResizeFill
    skView.presentScene(scene)
}

之后就可以正常使用了。