UISearchBar 高度自动改变大小 Swift

Question

这是我正在尝试做的事情：

截图来自Iphone:

我正在开发一个简单的应用程序并以编程方式添加 uisearchbar 但我真的很困惑为什么要像第二张图片一样从顶部显示额外的 space 。但是当我写的时候，uisearchbar 改变了我们的位置，就像第一张图片一样。

这是我的代码：

let searchController = UISearchController(searchResultsController: nil)

override func viewDidLoad() {
    super.viewDidLoad()

 self.searchController.obscuresBackgroundDuringPresentation = false
 self.searchController.searchBar.placeholder = "Search"
 self.searchController.searchBar.barStyle = .black
 self.searchController.searchBar.delegate = self
 self.definesPresentationContext = true
 if #available(iOS 11.0, *) {
 navigationItem.searchController = searchController
    } else {
        // Fallback on earlier versions
        navigationItem.titleView = searchController.searchBar
    }
   }

extension starControl: UISearchBarDelegate{

func searchBarTextDidBeginEditing(_ searchBar: UISearchBar)
{
    //Show Cancel
    searchBar.setShowsCancelButton(true, animated: true)
    searchBar.tintColor = .black
}

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String)
{

}

func searchBarSearchButtonClicked(_ searchBar: UISearchBar)  
{
    searchBar.setShowsCancelButton(false, animated: true)
    searchBar.resignFirstResponder()

    guard let term = searchBar.text , term.isEmpty == false else {

        return
    }
}

func searchBarCancelButtonClicked(_ searchBar: UISearchBar)
{
    searchBar.setShowsCancelButton(false, animated: true)
    searchBar.text = String()
    searchBar.resignFirstResponder()
 }
}

谁能告诉我如何解决这个问题，我已经尝试解决这个问题但还没有结果。

如有任何帮助，我们将不胜感激。

提前致谢。

Answer 1

这是最新的 swift4.2 代码和搜索栏的最新功能只是将此功能放在控制器中并从 viewDidLoad 调用。

func setupNavBar() {
        self.title = "Controller title"
        self.navigationController?.navigationBar.prefersLargeTitles = false
        self.navigationController?.navigationItem.largeTitleDisplayMode = .always
        let searchController = UISearchController(searchResultsController: nil)
        searchController.searchBar.delegate = self
        navigationItem.searchController = searchController
    }

UISearchBar 高度自动改变大小 Swift

UISearchBar Height Automatic Size Change Swift

ios

swift

uisearchbar