// 創(chuàng)建searchResultVC
let searchResultVC = UIViewController()
// 設(shè)置背景顏色為紅色
searchResultVC.view.backgroundColor = UIColor.red
let searchController = UISearchController(searchResultsController: searchResultVC)
// 設(shè)置背景顏色
searchController.view.backgroundColor = UIColor (red: 0.97, green: 0.97, blue: 0.97, alpha: 1.0)
// 默認(rèn)為YES,設(shè)置開始搜索時背景顯示與否
// searchController.dimsBackgroundDuringPresentation = false
// 默認(rèn)為YES,控制搜索時，是否隱藏導(dǎo)航欄
// searchController.hidesNavigationBarDuringPresentation = false
// 將搜索框視圖設(shè)置為tableView的tableHeaderView
tableView.tableHeaderView = searchController.searchBar

// 搜索框
let bar = searchController.searchBar
// 樣式
bar.barStyle = .default
// 設(shè)置光標(biāo)及取消按鈕的顏色
bar.tintColor = RGBA(r: 0.12, g: 0.74, b: 0.13, a: 1.00)
// 設(shè)置代理
bar.delegate = self

// 去除背景及上下兩條橫線
bar.setBackgroundImage(UIImage(), for: .any, barMetrics: .default)

// 右側(cè)語音
bar.showsBookmarkButton = true
bar.setImage(#imageLiteral(resourceName: "VoiceSearchStartBtn"), for: .bookmark, state: .normal)
監(jiān)聽語音按鈕的點擊
// MARK:- UISearchBarDelegate
extension LXFContactViewController: UISearchBarDelegate {
  func searchBarBookmarkButtonClicked(_ searchBar: UISearchBar) {
    LXFLog("點擊了語音按鈕")
  }
}