在macOS SceneKit上居中显示多行SCNtext

import SceneKit

let scene = SCNScene()

// 创建 SCNText 对象
let textGeometry = SCNText(string: "Hello\nWorld", extrusionDepth: 1.0)
textGeometry.font = UIFont.systemFont(ofSize: 12)
textGeometry.alignmentMode = .center

// 创建 SCNNode 并将 SCNText 添加到节点
let textNode = SCNNode(geometry: textGeometry)

// 计算文本的边界框
let (min, max) = textGeometry.boundingBox
let width = max.x - min.x
let height = max.y - min.y

// 设置节点的位置以使其居中
textNode.position = SCNVector3(x: 0 - width / 2, y: 0, z: 0)

// 将节点添加到场景中
scene.rootNode.addChildNode(textNode)

// 创建 SCNView 并设置场景
let scnView = SCNView(frame: CGRect(x: 0, y: 0, width: 800, height: 600))
scnView.scene = scene
scnView.allowsCameraControl = true
scnView.showsStatistics = true

// 将 SCNView 添加到窗口
if let window = NSApplication.shared.mainWindow {
    window.contentView?.addSubview(scnView)
}