swift - 如何在 Swift 中添加 SKSpriteNode 到场景中？

Question

我尝试将 SKSpriteNode 子类化为 GameObject，并且我想在游戏场景类之外实例化对象。这是我从 SKSpriteNode 派生的 GameObject 代码:

import SpriteKit

public class GameObject: SKSpriteNode {

    init( texture: SKTexture?, color: UIColor, size: CGSize, position:CGPoint, name:String ) 
    {   
        objectSize = size;
        objectName = name;
        objectSprite = texture;
        //call superclass here
        super.init(texture: texture, color: color, size: size);
        self.position = position;
    }

    convenience init(_ _x:CGFloat, _ _y:CGFloat, _ _object:String )// Default initializer
    {
        let texture = SKTexture(imageNamed: _object);
        let position = CGPoint(x:_x, y:_y);
        self.init(  texture: texture,color: UIColor(),size: texture.size(), position: position, name: _object);
    }

    //Overloaded initializer with size as extra argument
    convenience init(_ _x:CGFloat, _ _y:CGFloat, _ _size:Int, _ _object:String)
    {
        //size for the SKSpriteNode.
        let texture = SKTexture(imageNamed: _object);
        let position = CGPoint(x:_x, y:_y);
        self.init(  texture: texture, color: UIColor(), size: CGSize(width: _size, height: _size),position: position, name: _object);
    }

要实例化从 GameObject 派生的玩家，我必须编写:

let player = PlayerShip(100, 100, "PlayerShip")
addChild(player)

但是，addChild() 在 gameScene 之外不起作用。我的目标是实例化 PlayerShip 类中的子弹，但我不知道如何实现。有人有建议吗？

Answer 1

如果您想在 GameScene 之外执行此操作，您需要一种具有对 GameScene 引用的全局属性。然后你可以调用:

myGameScene.AddChild(player)