Ios 向导航添加完整的搜索栏

我正在向导航栏添加一个搜索栏，如下所示

    searchBar.showsCancelButton = false
    searchBar.placeholder = "Search"
    searchBar.delegate = self
    searchBar.enablesReturnKeyAutomatically = true
    self.navigationItem.titleView = searchBar

---

但是我有一个工具栏按钮项目，有没有办法隐藏它，并使搜索栏保持完整的长度呢？

试试下面的代码：

注意：当搜索栏处于活动状态时，使用按钮隐藏功能更新代码；当按下取消按钮时，代码返回

class ViewController: UIViewController,UISearchControllerDelegate, UISearchResultsUpdating, UISearchBarDelegate {

var resultSearchController : UISearchController!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    self.resultSearchController = UISearchController(searchResultsController:  nil)

    self.resultSearchController.searchResultsUpdater = self
    self.resultSearchController.delegate = self
    self.resultSearchController.searchBar.delegate = self
    self.resultSearchController.hidesNavigationBarDuringPresentation = false
    self.resultSearchController.dimsBackgroundDuringPresentation = true
    self.definesPresentationContext = true 

    self.navigationItem.titleView = resultSearchController.searchBar

    navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Your Button", style: .plain, target: self, action: #selector(addTapped))

}

func updateSearchResults(for searchController: UISearchController) {

    // You have to implement search delegate method here to make it work.

    if resultSearchController.isActive == true {

        self.navigationItem.rightBarButtonItem = nil
    }  else {       

    navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Your Button", style: .plain, target: self, action: #selector(addTapped))
    }
   }


func addTapped() {
    // You can do your stuff here. when your button pressed...
    print("Button Pressed")

   } 
}

输出：

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你有没有查看我的更新……啦啦队老师，我无法提升我的声誉，但谢谢你