将UIImageView或UITextView添加到自定义UIButton类的正确方法是什么？

import UIKit

class CustomButton: UIButton {
    private var imageView: UIImageView?
    private var textView: UITextView?

    func addImageView(image: UIImage) {
        imageView = UIImageView(image: image)
        imageView?.frame = bounds
        imageView?.contentMode = .scaleAspectFit
        addSubview(imageView!)
    }

    func addTextView(text: String) {
        textView = UITextView(frame: bounds)
        textView?.text = text
        textView?.textAlignment = .center
        addSubview(textView!)
    }
}

let customButton = CustomButton(frame: CGRect(x: 0, y: 0, width: 200, height: 50))
customButton.addImageView(image: UIImage(named: "image.png")!)
customButton.addTextView(text: "Button Text")