Builder patter + dot call

import UIKit

class ViewBuilder {

    private var view = UIView()

    func frame(_ frame: CGRect) -> ViewBuilder {
        view.frame = frame
        return self
    }
    func color(_ backgroundColor: UIColor) -> ViewBuilder {
        view.backgroundColor = backgroundColor
        return self
    }

    func build() -> UIView {
        return view
    }
}

let view = ViewBuilder()
    .frame(CGRect.zero)
    .color(.red)
    .build()