iOS v10 或更低版本：如何以编程方式在导航栏底部添加 UISearchController

Posted 2023-03-13

【中文标题】iOS v10 或更低版本：如何以编程方式在导航栏底部添加 UISearchController

【英文标题】：iOS v10 or lower: How to add UISearchController in the bottom of navigation bar Programmatically

【发布时间】：2018-11-06 06:39:14

【问题描述】：

我的应用的最低 ios 版本是 10.3。我可以在 iOS 11 的导航栏底部添加搜索栏。但是对于较低版本的 iOS 11，我想要相同的搜索栏，它应该是程序化的。请帮忙。谢谢

fileprivate func _setupNavigationBar() 
    let searchController = UISearchController(searchResultsController: nil)
    searchController.searchResultsUpdater = self
    searchController.obscuresBackgroundDuringPresentation = false
    searchController.searchBar.placeholder = "Search Here"
    if #available(iOS 11.0, *) 
        navigationItem.searchController = searchController
     else 
        // TODO: ????????????????
    
 

【问题讨论】：

您可以将其放置为titleView，或者创建自己的自定义导航栏

【参考方案1】：

class ViewController: UIViewController, UISearchControllerDelegate 

var controladorDeBusca: UISearchController!

var resultsTableViewController: ResultsTableViewController?

override func viewDidLoad() 
    super.viewDidLoad()

    resultsTableViewController = storyboard!.instantiateViewController(withIdentifier: "resultsTableViewController") as? ResultsTableViewController

    setUpSearchAtNaviagtion()


func setUpSearchAtNaviagtion() 

    controladorDeBusca = UISearchController(searchResultsController: resultsTableViewController)
    controladorDeBusca.delegate = self
    controladorDeBusca.searchResultsUpdater = resultsTableViewController
    controladorDeBusca.dimsBackgroundDuringPresentation = true
    definesPresentationContext = true

    controladorDeBusca.loadViewIfNeeded()

    //Configura a barra do Controlador de busca
    controladorDeBusca.searchBar.delegate = resultsTableViewController
    controladorDeBusca.hidesNavigationBarDuringPresentation = false
    controladorDeBusca.searchBar.placeholder = "Search place"
    controladorDeBusca.searchBar.sizeToFit()
    controladorDeBusca.searchBar.barTintColor = navigationController?.navigationBar.barTintColor
    controladorDeBusca.searchBar.tintColor = self.view.tintColor

    //Adiciona a barra do Controlador de Busca a barra do navegador
    navigationItem.titleView = controladorDeBusca.searchBar

试试这个..

【讨论】：

我不想通过替换导航栏的标题视图来设置搜索栏。我只想将它添加到导航栏下方。如果我点击座位栏进行编辑，导航栏会被滚动到顶部隐藏。