SoompiBlog - Layout Driven UI example.swift

class ArticleView: UIView {

  var totalCommentCount: Int = 0 {
    didSet {
      setNeedsLayout()
    }
  }
  
  var hasComment: Bool = false {
    didSet {
      setNeedsLayout()
    }
  }

  override func layoutSubviews() {
    super.layoutSubviews()
    reactionInfoView.commentCount = totalCommentCount
    commentsTableHeaderView.isHidden = !hasComment
  }
  
  lazy var reactionInfoView: ReactionInfoView = {
    let view = ReactionInfoView()
    view.translatesAutoresizingMaskIntoConstraints = false
    view.backgroundColor = .white
    return view
  }()
  
  lazy var commentsTableView: ContentFitTableView = {
    let tableView = ContentFitTableView()
    tableView.translatesAutoresizingMaskIntoConstraints = false
    tableView.estimatedRowHeight = 154
    tableView.rowHeight = UITableView.automaticDimension
    return tableView
  }()
  
  // ...
  
}