如何在自定义控件中使UIView居中？

import UIKit

class CustomView: UIView {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        // 初始化控件的frame
        self.frame = CGRect(x: 0, y: 0, width: 200, height: 200)
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        // 使用Auto Layout实现居中布局
        self.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            self.centerXAnchor.constraint(equalTo: self.superview!.centerXAnchor),
            self.centerYAnchor.constraint(equalTo: self.superview!.centerYAnchor)
        ])
        
        // 或者使用手动计算实现居中布局
        /*
        self.frame.origin.x = (self.superview!.frame.width - self.frame.width) / 2
        self.frame.origin.y = (self.superview!.frame.height - self.frame.height) / 2
        */
    }
    
    override func draw(_ rect: CGRect) {
        super.draw(rect)
        
        // 绘制控件的外观
        let context = UIGraphicsGetCurrentContext()
        context?.setFillColor(UIColor.red.cgColor)
        context?.fill(rect)
    }
}