Some of my favorite convenience initializers for UIView subclass

UIView+Initializers.swift

import UIKit

extension UIView {
    convenience init(_ maskIntoConstraints: Bool) {
        self.init()
        self.translatesAutoresizingMaskIntoConstraints = maskIntoConstraints
    }
}

extension UILabel {
    convenience init(text: String?, font: UIFont, color: UIColor? = nil, alignment: NSTextAlignment? = nil) {
        self.init(false)
        self.text = text
        self.font = font
        self.textColor = color
        self.numberOfLines = 0
        self.textAlignment = alignment ?? .left
    }
}

extension UITextField {
    convenience init(text: String?, font: UIFont) {
        self.init(false)
        self.text = text
        self.font = font
        self.translatesAutoresizingMaskIntoConstraints = false
    }
}

extension UIScrollView {
    convenience init(bounceVertical: Bool) {
        self.init(false)
        self.alwaysBounceVertical = bounceVertical
    }
}

extension UIButton {

    convenience init(title: String) {
        self.init(false)
        self.setTitle(title, for: .normal)
    }

    convenience init(title: String? = nil, target: Any?, action: Selector, for f: UIControl.Event? = .touchUpInside) {
        self.init(false)
        self.setTitle(title, for: .normal)
        addTarget(target, action: action, for: f!)
    }

    convenience init(image: UIImage?, target: Any?, action: Selector, for f: UIControl.Event? = .touchUpInside) {
        self.init(false)
        self.setImage(image, for: .normal)
        addTarget(target, action: action, for: f!)
    }
}

extension UITableView {
    convenience init(style: Style, dataSource: UITableViewDataSource, delegate: UITableViewDelegate?) {
        self.init(frame: .zero, style: style)
        self.dataSource = dataSource
        self.delegate = delegate
        self.translatesAutoresizingMaskIntoConstraints = false
    }
}

extension UIImageView {
    convenience init(_ image: UIImage?, tint: UIColor? = nil) {
        self.init(false)
        self.image = image
        self.tintColor = tint
    }

    convenience init(_ contentMode: ContentMode) {
        self.init(false)
        self.contentMode = contentMode
    }

    convenience init(_ image: UIImage?, contentMode: ContentMode) {
        self.init(false)
        self.image = image
        self.contentMode = contentMode
    }
}

extension UISlider {
    convenience init(value: Float, minValue: Float, maxValue: Float) {
        self.init(false)
        self.minimumValue = minValue
        self.maximumValue = maxValue
        self.value = value
    }
}

extension UISegmentedControl {
    convenience init(titles: [String], selectedIndex: Int? = nil) {
        self.init(items: titles)
        translatesAutoresizingMaskIntoConstraints = false

        if let index = selectedIndex {
            self.selectedSegmentIndex = index
        }
    }
}

extension UIStackView {
    convenience init(spacing: CGFloat, axis: NSLayoutConstraint.Axis) {
        self.init(false)
        self.spacing = spacing
        self.axis = axis
    }
}