如何使用自定义编程式UIView更改UILabel的属性[Swift 5]

class CustomView: UIView {
    // 自定义的UIView子类代码
}

class CustomView: UIView {
    var label: UILabel!

    override init(frame: CGRect) {
        super.init(frame: frame)
        setupLabel()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        setupLabel()
    }

    private func setupLabel() {
        label = UILabel()
        label.text = "Hello World"
        label.textColor = UIColor.black
        label.font = UIFont.systemFont(ofSize: 16)
        addSubview(label)
        
        // 添加约束或设置frame来布局label
    }
}

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