将两个视图包含在父系视图中，并执行下列操作：

if let firstIndex = view.subviews.firstIndex(of: view1), let secondIndex = view.subviews.firstIndex(of: view2) {
        let firstViewFrame = view1.frame

        UIView.animate(withDuration: 1, animations: {
            self.view1.frame = self.view2.frame
            self.view2.frame = firstViewFrame
            self.view.exchangeSubview(at: firstIndex, withSubviewAt: secondIndex)
        })
    }

看看答案here。
编辑：我可以使用Autolayout约束来实现上述动画。基本上我所做的是最初为两个视图设置固定约束。并设置两组变化的约束- startConstraints和endConstraints。只需激活和取消激活约束即可完成工作。Check out the demo.以下是我的代码：

class ViewController: UIViewController {
var view1: UIView = {
    let v = UIView()
    v.backgroundColor = .red
    return v
}()

var view2: UIView = {
    let v = UIView()
    v.backgroundColor = .blue
    return v
}()

var button: UIButton = {
    let b = UIButton()
    b.setTitle("Animate", for: .normal)
    b.setTitleColor(.black, for: .normal)
    return b
}()

var fixedConstraints: [NSLayoutConstraint]!
var startConstraints: [NSLayoutConstraint]!
var endConstraints: [NSLayoutConstraint]!

override func viewDidLoad() {
    super.viewDidLoad()
    view.addSubview(view1)
    view.addSubview(view2)
    view.addSubview(button)
    
    view1.translatesAutoresizingMaskIntoConstraints = false
    view2.translatesAutoresizingMaskIntoConstraints = false
    button.translatesAutoresizingMaskIntoConstraints = false
    
    fixedConstraints = [
        button.centerXAnchor.constraint(equalTo: view.centerXAnchor),
        button.centerYAnchor.constraint(equalTo: view.centerYAnchor),
        view1.centerXAnchor.constraint(equalTo: view.centerXAnchor),
        view2.centerXAnchor.constraint(equalTo: view.centerXAnchor),
        view1.heightAnchor.constraint(equalToConstant: 100),
        view1.widthAnchor.constraint(equalToConstant: 100),
        view2.heightAnchor.constraint(equalToConstant: 100),
        view2.widthAnchor.constraint(equalToConstant: 100),
    ]
    
    startConstraints = [
        view1.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 0),
        view.safeAreaLayoutGuide.bottomAnchor.constraint(equalTo: view2.bottomAnchor),
    ]
    
    startConstraints.append(contentsOf: fixedConstraints)
    NSLayoutConstraint.activate(startConstraints)
    
    button.addTarget(self, action: #selector(animateSwitchingOfViews), for: .touchUpInside)
}

@objc
private func animateSwitchingOfViews(){
    endConstraints = [
        view2.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 0),
        view.safeAreaLayoutGuide.bottomAnchor.constraint(equalTo:view1.bottomAnchor)
    ]
    endConstraints.append(contentsOf: fixedConstraints)
    
    UIView.animate(withDuration: 2, animations: {
        NSLayoutConstraint.deactivate(self.startConstraints)
        NSLayoutConstraint.activate(self.endConstraints)
        self.view.layoutIfNeeded()
    })
}

}

最新消息：我通过使用transform修复了它。我尝试了很多次动画约束，尝试了顶部/底部约束之间的每一种可能的交互，但它要么什么都不做，要么只是bug我的视图并将其发送到地狱。我甚至在与同事的支持电话中坚持动画约束。他们也是。然而，在谷歌搜索绝望措施后，最后我使用了viewController.myView.myLabel.transform = CGAffineTransform（转换X：0，y：236）。
当然，您可以将其简化为：转换= CGAffineTransform（平移X：0，y：236）。这个值是任意的，我不确定它是否会在某一天崩溃或导致不希望的行为。我在iPhone 8和iPhone 13上测试了它，在这两个动画中表现都很好（A视图下降，B视图上升，点击切换并执行相反的操作，等等...）。
边注：如果你要使用这个，当你需要你的视图“回到”它们开始的地方时，你不需要复制/粘贴值。我分别为A和B使用了236和-236，但是为了恢复它们，我需要使用-2和2，否则它会超级bug。我不知道为什么。但是它工作！谢谢大家

假设您想要“交换中心”，并且不想修改约束/常量，则***可以***使用变换。
但是，您可以像这样执行，而不是硬编码值：

// if the views are in their "original" positions
if ownAccountTransferView.transform == .identity {
    let xOffset = fromAccountTypeView.center.x - ownAccountTransferView.center.x
    let yOffset = fromAccountTypeView.center.y - ownAccountTransferView.center.y
    UIView.animate(withDuration: 1.0, animations: {
        self.ownAccountTransferView.transform = CGAffineTransform(translationX: xOffset, y: yOffset)
        self.fromAccountTypeView.transform = CGAffineTransform(translationX: -xOffset, y: -yOffset)
    })
} else {
    UIView.animate(withDuration: 1.0, animations: {
        self.ownAccountTransferView.transform = .identity
        self.fromAccountTypeView.transform = .identity
    })
}