小编clo*_*mas的帖子

在 Swift 中，我试图实现一个 hide searchBar，它在滚动时变得可见，

我正在用这个

navigationItem.searchController = searchController
navigationItem.hidesSearchBarWhenScrolling = true

我尝试移动上面的代码，但无论searchBar在文件中的何处调用它，它都是可见的ViewController。

有什么可能是overriding这个功能吗？文件中我引用searchBaror 的唯一其他代码searchController如下：

if self.searchController.isActive && searchController.searchBar.text != "" {...

self.searchController.searchBar.placeholder = "Search \(title)"

func updateSearchResults(for searchController: UISearchController) {

if let searchText = searchController.searchBar.text, !searchText.isEmpty {
        filteredArr = defaultArr.filter {...

func configureSearchController () {

    //Setup the Search Controller
    searchController.searchResultsUpdater = self
    searchController.hidesNavigationBarDuringPresentation = true
    searchController.dimsBackgroundDuringPresentation = false
    searchController.searchBar.searchBarStyle = .minimal
    searchController.definesPresentationContext = true
    navigationItem.searchController = searchController
    navigationItem.hidesSearchBarWhenScrolling …