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如何将搜索栏与Navigaitonbar一起使用

uisearchdisplaycontroller uisearchcontroller swift ios

user3051673 · 技术社区 · 7 年前

我已经成功地让UISearchController在一个新项目中工作,但当我在自己的项目中尝试做同样的事情时,它的行为会有所不同。

这就是我所做的,让它发挥作用。

情节提要:

这是我的视图控制器代码:

class ViewController: UIViewController, UISearchControllerDelegate, UISearchResultsUpdating, UISearchBarDelegate {

    var searchController : UISearchController!

    override func viewDidLoad() {
        super.viewDidLoad()

        let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let modalVC =  mainStoryboard.instantiateViewController(withIdentifier: "SearchTableViewController_SBID")
        self.searchController = UISearchController(searchResultsController:  modalVC)

        self.searchController.searchResultsUpdater = self
        self.searchController.delegate = self
        self.searchController.searchBar.delegate = self

        self.searchController.hidesNavigationBarDuringPresentation = false
        self.searchController.dimsBackgroundDuringPresentation = true

        self.navigationItem.titleView = searchController.searchBar

        self.definesPresentationContext = true
    }

    func updateSearchResults(for searchController: UISearchController) {

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

我得到的结果是,当我单击搜索栏时,背景将变暗,当我开始键入时,tableview控制器将可见,搜索栏是否仍在tableview控制器的导航栏中可见。

然而,当我尝试在项目中实现相同的内容时,当我开始在搜索栏上键入时,表视图控制器将填满整个屏幕,导航栏不可见。

这是我的项目的情节提要:

请注意,这两个项目都是相似的,只是其中一个是 Navigation Controller -> Tab Bar View Controller ,当我在搜索栏上键入时,它不会显示导航栏。

如何在项目中显示导航栏 导航控制器->选项卡栏视图控制器 ?

这是两个项目的情况:

1 回复 | 直到 7 年前

Jaydeep Vyas 7 年前

情节提要设置

两个视图控制器的编码

class ViewController1: UIViewController,UISearchBarDelegate {
    @IBOutlet weak var lbl1: UILabel!
    var searchBar:UISearchBar? = nil
    override func viewDidLoad() {
        super.viewDidLoad()

        //Code to identify the searchbar
        for view in (self.tabBarController?.navigationItem.titleView?.subviews)!
        {
            if view.isKind(of: UISearchBar.self)
            {
                searchBar = (view as! UISearchBar);
            }
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        //Assign Delegate and blank the search bar text 
        searchBar?.text = ""
        searchBar?.delegate = self

    }
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        lbl1.text = "Tab 1 : \(searchText)"

    }

}
class ViewController2: UIViewController,UISearchBarDelegate {
    @IBOutlet weak var lbl1: UILabel!
    var searchBar:UISearchBar? = nil
    override func viewDidLoad() {
        super.viewDidLoad()

        //Code to identify the searchbar
        for view in (self.tabBarController?.navigationItem.titleView?.subviews)!
        {
            if view.isKind(of: UISearchBar.self)
            {
                searchBar = (view as! UISearchBar);
            }
        }
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        searchBar?.text = ""
        searchBar?.delegate = self
    }
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        lbl1.text = "Tab 2 : \(searchText)"

    }

}

后果