test playground

//: Playground - noun: a place where people can play

import UIKit

class AView: UIView {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        customInitialisation()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        customInitialisation()
    }
    
    var label: UILabel {
        let label = UILabel(frame: CGRect(x: 10, y: 10, width: 100, height: 30))
        label.font = UIFont.systemFont(ofSize: 24.0)
        label.text = "my label"
        return label
    }
    
}

extension AView {
    func customInitialisation() {
        addSubview(label)
        backgroundColor = .red
        label.backgroundColor = .blue
        label.textColor = .white
    }
}

let view = AView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))