为以编程方式创建的NSLayoutConstraint设置动画

// 创建需要进行布局的视图
let view = UIView()
view.backgroundColor = UIColor.red
view.translatesAutoresizingMaskIntoConstraints = false

// 添加视图到父视图中
superview.addSubview(view)

// 创建约束对象
let leadingConstraint = NSLayoutConstraint(item: view, attribute: .leading, relatedBy: .equal, toItem: superview, attribute: .leading, multiplier: 1.0, constant: 20)
let topConstraint = NSLayoutConstraint(item: view, attribute: .top, relatedBy: .equal, toItem: superview, attribute: .top, multiplier: 1.0, constant: 20)
let widthConstraint = NSLayoutConstraint(item: view, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 100)
let heightConstraint = NSLayoutConstraint(item: view, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 100)

// 添加约束对象到父视图的约束集合中
superview.addConstraints([leadingConstraint, topConstraint, widthConstraint, heightConstraint])

// 设置动画效果
UIView.animate(withDuration: 0.5, animations: {
    // 更改约束对象的constant属性
    leadingConstraint.constant = 200
    topConstraint.constant = 200
    
    // 强制布局变化
    superview.layoutIfNeeded()
})