ios - 搜索栏在点击时隐藏

您好，我在 UIView 上添加了搜索栏。当我运行我的代码时，我可以看到我的搜索栏，但是当我在搜索栏中点击它时它会隐藏起来，当我再次点击屏幕上的某个地方时它是可见的。我现在没有遇到这个问题。请帮忙。

 var searchView:UIView = {
        var search = UIView()
        search.translatesAutoresizingMaskIntoConstraints = false
        search.backgroundColor = UIColor.gray
        return search
    }()

   lazy var searchController : UISearchController = {
        var searchController = UISearchController(searchResultsController: nil)
        //searchController.searchResultsUpdater = self
        searchController.hidesNavigationBarDuringPresentation = false
        searchController.searchBar.barTintColor = UIColor.gray
        searchController.searchBar.layer.borderWidth = 1
        searchController.searchBar.layer.borderColor = UIColor.gray.cgColor
        //searchController.dimsBackgroundDuringPresentation = false
        searchController.definesPresentationContext = true
        searchController.searchBar.sizeToFit()
        searchController.searchBar.translatesAutoresizingMaskIntoConstraints = false
        return searchController
    }()
func setUpView(){
    view.addSubview(searchView)
    searchView.addSubview(searchController.searchBar)

    searchView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
    searchView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
    searchView.topAnchor.constraint(equalTo: view.topAnchor,constant:64).isActive = true
    searchView.heightAnchor.constraint(equalToConstant: 65).isActive = true

    searchController.searchBar.leftAnchor.constraint(equalTo: searchView.leftAnchor).isActive = true
    searchController.searchBar.rightAnchor.constraint(equalTo: searchView.rightAnchor).isActive = true
    searchController.searchBar.topAnchor.constraint(equalTo: searchView.topAnchor,constant:10).isActive = true
    searchController.searchBar.widthAnchor.constraint(equalTo: searchView.widthAnchor).isActive = true
    }

我也在 ViewDidLoad()-:

中给出了这一行

self.extendedLayoutIncludesOpaqueBars = true

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Best Answer-推荐答案

我发现 UISearchController 的 searchBar 在设置 translatesAutoresizingMaskIntoConstraints = false 时效果不佳。作为一种解决方法，我将搜索栏嵌入到具有所需约束的占位符 View 中:

let searchBarPlaceholderView = UIView()
searchBarPlaceholderView.addSubview(searchController.searchBar)
searchBarPlaceholderView.translatesAutoresizingMaskIntoConstraints = false
searchBarPlaceholderView.heightAnchor.constraint(equalToConstant: 56).isActive = true
stackView.addArrangedSubview(searchBarPlaceholderView)

注意，searchController.searchBar 的 translatesAutoresizingMaskIntoConstraints 属性设置为 true。

关于ios - 搜索栏在点击时隐藏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45223386/