如何在UILabel中使用动画师

import QuartzCore

let label = UILabel(frame: CGRect(x: 50, y: 100, width: 200, height: 50))
label.text = "Hello World"
label.textAlignment = .center
label.textColor = UIColor.black

// 创建动画
let animation = CABasicAnimation(keyPath: "position.x")

// 设置动画属性
animation.fromValue = 50
animation.toValue = 200
animation.duration = 2.0
animation.repeatCount = Float.infinity
animation.autoreverses = true

// 将动画添加到UILabel的层上
label.layer.add(animation, forKey: "position")

self.view.addSubview(label)