如何在Swift中多次设置UIView翻转的动画

import UIKit

// 创建一个UIView对象
let myView = UIView(frame: CGRect(x: 100, y: 100, width: 100, height: 100))
myView.backgroundColor = UIColor.red

// 设置初始状态
myView.transform = CGAffineTransform(scaleX: 0.5, y: 0.5)

// 添加到父视图中
let parentView = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
parentView.backgroundColor = UIColor.white
parentView.addSubview(myView)

// 设置动画效果
UIView.animate(withDuration: 1.0, animations: {
    // 第一次翻转
    myView.transform = CGAffineTransform(rotationAngle: CGFloat.pi)
}, completion: { _ in
    UIView.animate(withDuration: 1.0, animations: {
        // 第二次翻转
        myView.transform = CGAffineTransform(rotationAngle: CGFloat.pi * 2)
    }, completion: { _ in
        // 动画完成后的回调函数
        print("动画完成")
    })
})

// 将父视图添加到主视图中
let mainView = UIView(frame: CGRect(x: 0, y: 0, width: 400, height: 400))
mainView.backgroundColor = UIColor.lightGray
mainView.addSubview(parentView)