在CAShapeLayer中为不同的角设置动画

// 创建CAShapeLayer对象
let shapeLayer = CAShapeLayer()

// 创建路径
let path = UIBezierPath()

// 绘制矩形
path.move(to: CGPoint(x: 50, y: 50))
path.addLine(to: CGPoint(x: 150, y: 50))
path.addLine(to: CGPoint(x: 150, y: 150))
path.addLine(to: CGPoint(x: 50, y: 150))
path.close()

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

// 设置CAShapeLayer的填充颜色
shapeLayer.fillColor = UIColor.red.cgColor

// 添加CAShapeLayer到视图中
view.layer.addSublayer(shapeLayer)

// 创建角度变化的动画
let animation = CABasicAnimation(keyPath: "transform.rotation.z")
animation.fromValue = 0
animation.toValue = CGFloat.pi * 2
animation.duration = 2
animation.repeatCount = .infinity

// 将动画添加到CAShapeLayer中
shapeLayer.add(animation, forKey: "rotationAnimation")