如何为iPhone 8屏幕和iPhone X及以上版本的屏幕设置不同的底部锚点常量？

import UIKit

func isIPhoneXOrAbove() -> Bool {
    if UIDevice.current.userInterfaceIdiom == .phone {
        if #available(iOS 11.0, *) {
            let window = UIApplication.shared.windows[0]
            if window.safeAreaInsets.bottom > 0 {
                return true
            }
        }
    }
    return false
}

import UIKit

let bottomAnchorConstant: CGFloat = isIPhoneXOrAbove() ? 34.0 : 0.0

// 使用Auto Layout设置底部锚点的约束
yourView.bottomAnchor.constraint(equalTo: superview.bottomAnchor, constant: -bottomAnchorConstant).isActive = true