ios - 搜索栏未显示在导航栏 iOS 11 上

Question

我正在将 viewController 推送到我想要搜索栏的地方，但搜索栏根本没有显示。下面是代码。我错过了什么吗？

var searchController = UISearchController(searchResultsController: nil)
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "Search here..."
definesPresentationContext = true
searchController.searchBar.delegate = self
searchController.searchBar.sizeToFit()
if #available(iOS 11.0, *) {

    self.navigationItem.searchController = searchController
} else {
    // Fallback on earlier versions
    navigationItem.titleView = searchController.searchBar
    navigationItem.titleView?.layoutSubviews()
}

Answer 1

您需要将这一行添加到您的代码中:

navigationItem.hidesSearchBarWhenScrolling = false

这会在滚动时移除隐藏的 searchBar，并在推送 View Controller 时显示它。