如何在CAShapeLayer中更改区域？

// 导入必要的库
import UIKit

// 创建CAShapeLayer对象
let shapeLayer = CAShapeLayer()

// 创建路径对象
let path = UIBezierPath()

// 设置路径的起始点和形状
path.move(to: CGPoint(x: 50, y: 50))
path.addLine(to: CGPoint(x: 100, y: 100))
path.addLine(to: CGPoint(x: 150, y: 50))
path.close()

// 将路径设置给CAShapeLayer
shapeLayer.path = path.cgPath

// 更改区域：移动路径的起始点
path.move(to: CGPoint(x: 100, y: 100))
path.addLine(to: CGPoint(x: 150, y: 150))
path.addLine(to: CGPoint(x: 200, y: 100))
path.close()

// 更新CAShapeLayer的路径
shapeLayer.path = path.cgPath