在SceneKit iOS中使用平移手势旋转节点

import UIKit
import SceneKit

class ViewController: UIViewController {

    var sceneView: SCNView!
    var node: SCNNode!
    var lastPosition: CGPoint!

    override func viewDidLoad() {
        super.viewDidLoad()

        // 创建SCNView实例
        sceneView = SCNView(frame: view.bounds)
        view.addSubview(sceneView)

        // 创建场景和相机
        let scene = SCNScene()
        sceneView.scene = scene
        let cameraNode = SCNNode()
        cameraNode.camera = SCNCamera()
        scene.rootNode.addChildNode(cameraNode)
        cameraNode.position = SCNVector3(x: 0, y: 0, z: 5)

        // 创建一个节点
        node = SCNNode()
        let geometry = SCNBox(width: 1, height: 1, length: 1, chamferRadius: 0)
        node.geometry = geometry
        scene.rootNode.addChildNode(node)

        // 添加平移手势
        let panGesture = UIPanGestureRecognizer(target: self, action: #selector(handlePan(_:)))
        sceneView.addGestureRecognizer(panGesture)
    }

    @objc func handlePan(_ gesture: UIPanGestureRecognizer) {
        if gesture.state == .began {
            lastPosition = gesture.location(in: sceneView)
        } else if gesture.state == .changed {
            let currentPosition = gesture.location(in: sceneView)
            let deltaX = Float(currentPosition.x - lastPosition.x)
            let deltaY = Float(currentPosition.y - lastPosition.y)

            // 计算旋转角度
            let angleX = deltaX * 0.01
            let angleY = deltaY * 0.01

            // 应用旋转动作到节点
            let rotation = SCNAction.rotateBy(x: 0, y: CGFloat(angleX), z: CGFloat(angleY), duration: 0)
            node.runAction(rotation)

            lastPosition = currentPosition
        }
    }
}