Swift - Sprite套件物理-将动态切换为true和false

import SpriteKit

class GameScene: SKScene {
    var dynamicNode: SKSpriteNode!
    
    override func didMove(to view: SKView) {
        // 创建一个物理体
        let physicsBody = SKPhysicsBody(circleOfRadius: 50)
        physicsBody.isDynamic = true // 初始状态为动态
        
        // 创建一个节点并添加物理体
        dynamicNode = SKSpriteNode(color: .blue, size: CGSize(width: 100, height: 100))
        dynamicNode.position = CGPoint(x: frame.midX, y: frame.midY)
        dynamicNode.physicsBody = physicsBody
        addChild(dynamicNode)
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        // 切换isDynamic属性
        dynamicNode.physicsBody?.isDynamic.toggle()
        
        // 改变节点颜色以反映状态变化
        dynamicNode.color = dynamicNode.physicsBody?.isDynamic == true ? .blue : .red
    }
}