Mac 3D graphic w/o game template

Ref: https://www.weheartswift.com/introduction-scenekit-part-1/
Macbook pro (OS X EI Captian 10.11.5)
Xcode 7.3.1
案例以Single View Template 始，依序加入SceneKit Framework, PrimitivesScene.swift(建置繼承SCNView       類別的PrimitivesScene類別)，在PrimitivesScene類別建構元方法中建置3D物件，在ViewController的載入方法(viewDidLoad)中加入以PrimitivesScene類別建置的場景物件與，相機等物件．細部步驟：
1. Open New SingleView
2. 加入SceneKit Framework
   2.1 選取專案目標(Target)
   2.2 選取  Build Phases
   2.3 在Link Binary With Libraries 選取+ (加入程式庫)
   2.4 搜尋SceneKit.framework

3. 專案中建立新類別(加入檔案 PrimitivesScene.swift)

空白檔案僅有 import Foundation

import Foundation

//---- 依序建立繼承SCNScene類別的場景類別

import SceneKit

// 3.1. Add class  繼承 SCNScene

class PrimitivesScene : SCNScene {

// 3.2. Add init() method and required ... (auto fixed)

    override init() {

        super.init()

// 3.3. Add  圓

        let sphereGeometry = SCNSphere(radius: 0.5)

        let sphereNode = SCNNode(geometry: sphereGeometry)

        self.rootNode.addChildNode(sphereNode)

// 3.4. Add 2nd circle

        let secondSphereGeometry = SCNSphere(radius: 1.0)

        let secondSphereNode = SCNNode(geometry: secondSphereGeometry)

        secondSphereNode.position = SCNVector3(x: 3.0, y: 0.0, z: 0.0)

        self.rootNode.addChildNode(secondSphereNode)

        

    }

    // 3.1.2 選取自動修正產生

    required init?(coder aDecoder: NSCoder) {

        fatalError("init(coder:) has not been implemented")

    }

    

    

}

3.5 3.2-3.4 可先測試完再依序加入

4. viewController.swift 建置程序

// 4.2.配合MVC的方式，先在 Main.storyboard 加入 Scene Kit View 物件

import UIKit

// 4.1. Add import

import SceneKit

class ViewController: UIViewController {

// 4. 3, 以輔助視窗將(View)Main.storyboad的控制項連結至(Control)類別

//          Connect Scene Kit View

    @IBOutlet weak var scnview: SCNView!

    override func viewDidLoad() {

        super.viewDidLoad()

// Do any additional setup after loading the view, typically from a nib.

//  4.2-4.3 取代原範例       let scnview = self.view as! SCNView 

        scnview.scene = PrimitivesScene()

        scnview.backgroundColor = UIColor.blackColor()

        scnview.autoenablesDefaultLighting = true

        scnview.allowsCameraControl = true

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}

5. Result