使用自动布局约束旋转后对齐UILabel文本

// 创建UILabel
let label = UILabel()
label.text = "Hello, World!"

// 将UILabel添加到父视图中
view.addSubview(label)

// 禁用AutoresizingMask，启用Auto Layout
label.translatesAutoresizingMaskIntoConstraints = false

// 创建约束
let leadingConstraint = label.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20)
let topConstraint = label.topAnchor.constraint(equalTo: view.topAnchor, constant: 20)

// 添加约束
NSLayoutConstraint.activate([leadingConstraint, topConstraint])

// 在旋转设备时更新约束
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    super.viewWillTransition(to: size, with: coordinator)
    
    coordinator.animate(alongsideTransition: { _ in
        // 更新约束
        leadingConstraint.constant = 50
        topConstraint.constant = 50
    }, completion: nil)
}