#swtws

ChildViewController.swift

final class HogeViewController: UIViewContoller {
  private lazy var searchViewController: SearchViewController = {
    let vc = SearchViewController()
    self.addChildViewController(vc)
    self.view.addSubview(vc.view)
    vc.view.snp_makeConstraints { $0.edges.equalToSuperview() }
    vc.didMoveToParentViewController(self)
    return vc
  }()
}

extension HogeViewController: UISearchBarDelegate {
   func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
      // 以下の最初の参照時に初めてsearchViewControllerが初期化される
      searchViewController.search(searchText)
   }
}