Self sizing chat cells

Self-Sizing-TableView-Cells-pt1.swift

import UIKit

class ChatCell: UITableViewCell {
    lazy var iconImageView: UIImageView = {
        let imageView = UIImageView()
        let icon = UIImage(named: "icons8-Sheep on Bike")
        imageView.translatesAutoresizingMaskIntoConstraints = false
        imageView.backgroundColor = .clear
        imageView.layer.cornerRadius = 25
        imageView.contentMode = .scaleAspectFit
        imageView.image = icon

        return imageView
    }()

    lazy var messageBackground: UIView = {
        let backgroundView = UIView()
        backgroundView.translatesAutoresizingMaskIntoConstraints = false
        backgroundView.backgroundColor = #colorLiteral(red: 0, green: 0.5898008943, blue: 1, alpha: 1)
        backgroundView.layer.cornerRadius = 10
        return backgroundView
    }()

    lazy var messageLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.numberOfLines = 0
        label.backgroundColor = .clear
        label.textColor = .white

        return label
    }()

    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        layoutViews()
    }

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

    func layoutViews() {
        contentView.addSubview(iconImageView)
        contentView.addSubview(messageBackground)
        messageBackground.addSubview(messageLabel)

        NSLayoutConstraint.activate([
            iconImageView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 8),
            iconImageView.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 8),
            iconImageView.widthAnchor.constraint(equalToConstant: 50),
            iconImageView.heightAnchor.constraint(equalTo: iconImageView.widthAnchor),
            iconImageView.bottomAnchor.constraint(lessThanOrEqualTo: contentView.bottomAnchor, constant: -5),
            messageBackground.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 8),
            messageBackground.bottomAnchor.constraint(lessThanOrEqualTo: contentView.bottomAnchor, constant: -8),
            messageBackground.leadingAnchor.constraint(equalTo: iconImageView.trailingAnchor, constant: 12),
            messageBackground.trailingAnchor.constraint(lessThanOrEqualTo: contentView.trailingAnchor, constant: -70),
            messageLabel.trailingAnchor.constraint(lessThanOrEqualTo: messageBackground.trailingAnchor, constant: -5),
            messageLabel.topAnchor.constraint(equalTo: messageBackground.topAnchor, constant: 5),
            messageLabel.bottomAnchor.constraint(equalTo: messageBackground.bottomAnchor, constant: -5),
            messageLabel.leadingAnchor.constraint(equalTo: messageBackground.leadingAnchor, constant: 5)
            ])
    }
}