为什么它不能在 swift 2 的操场上显示任何东西? [英] why it cannot show anything in playground in swift 2?

问题描述

我尝试使用 spriteKit 在辅助编辑器的操场上展示一些东西.然而，什么都没有显示.下面是代码.如果有人可以显示结果(蓝色矩形)，请通知我.如果不是，请找出问题所在.

I try to use spriteKit to show something in playground in assistant editor. However, nothing showed. Below is the code. And if any one can show the results (a blue rectangle), please inform me. If not, please figure out where the problem is.

import UIKit
import SpriteKit

let view:SKView = SKView(frame: CGRectMake(0, 0, 1000, 800))
let scene:SKScene = SKScene(size: CGSizeMake(1000, 800))
scene.scaleMode = SKSceneScaleMode.AspectFit

let blueBox: SKSpriteNode = SKSpriteNode(color: UIColor.blueColor(), size: CGSizeMake(300, 300))
blueBox.position = CGPointMake(512, 384)
scene.addChild(blueBox)

view.presentScene(scene)

推荐答案

您可以通过单击边栏中的 QuickLook(眼睛)或带圆圈的加号按钮来查看视图的当前状态.但是要查看您的 SpriteKit 场景动画，您可能需要实时视图.为此，您需要 XCPlayground 框架.

You can see the current state of a view by clicking the QuickLook (eye) or circled-plus button in the sidebar. But to see your SpriteKit scene animate, you probably want a live view. For that, you need the XCPlayground framework.

import XCPlayground
XCPShowView("my SpriteKit view", view)

有关详细信息，请阅读探索和在 Xcode 帮助中评估 Playground 中的 Swift 代码或观看 WWDC 2014 session 408:斯威夫特游乐场.

For details, read up on Exploring and Evaluating Swift Code in a Playground in Xcode Help or watch WWDC 2014 session 408: Swift Playgrounds.

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