将UILabel添加到自定义UIView，但不在UIImage视图上显示

import UIKit

class CustomView: UIView {
    private var label: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        
        // 创建UILabel并设置属性
        label = UILabel()
        label.text = "Hello World"
        label.font = UIFont.systemFont(ofSize: 16)
        label.textColor = UIColor.black
        
        // 将UILabel添加到CustomView
        addSubview(label)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        // 调整UILabel的位置和大小
        label.frame = bounds
    }
    
    override func draw(_ rect: CGRect) {
        // 将UILabel添加到CustomView的图层上
        layer.addSublayer(label.layer)
    }
}

let customView = CustomView(frame: CGRect(x: 0, y: 0, width: 200, height: 100))
parentView.addSubview(customView)