UISearchController - 键盘未显示 [英] UISearchController - Keyboard not showing

问题描述

我正在使用 UISearchController 并且除了两件事外，搜索功能有效.也许它们是相关的:a) 键盘不显示.所以我不能按搜索"按钮b) 在我的主 TableView 中，我访问了样式为Subtitle"的原型单元格.搜索进行时，显示的单元格为基本"样式.在这两种情况下(TableViewController 和 SearchViewController)，我使用相同的单元格标识符.

I am using the UISearchController and the search function works except for two things. Perhaps they are related: a) The keyboard does not show. So I cannot press the "Search" button b) In my main TableView I access the prototype cell that has the style "Subtitle". When the search is going on, the cell that shows is "Basic" style. In both cases (TableViewController and SearchViewController) I use the same cell identifier.

有什么想法吗?部分代码如下:

Any ideas? Here some of the code:

class OverviewTableViewController: UITableViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let resultsController = SearchResultsController()
        resultsController.birds = birds
        searchController = UISearchController(searchResultsController: resultsController)
        //searchController.dimsBackgroundDuringPresentation = true

        let searchBar = searchController.searchBar
        searchBar.scopeButtonTitles = ["One", "Two"]
        searchBar.placeholder = "Search"
        searchBar.sizeToFit()
        tableView.tableHeaderView = searchBar
        searchController.searchResultsUpdater = resultsController

和第二类:

class SearchResultsController: UITableViewController, UISearchResultsUpdating {

    var items: [Item] = []
    var filtered: [Item] = []

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
}

// MARK: - UISearchResultsUpdating Conformance

func updateSearchResultsForSearchController(searchController: UISearchController) {
    //searchController.hidesNavigationBarDuringPresentation = true
    let searchString = searchController.searchBar.text
    let buttonIndex = searchController.searchBar.selectedScopeButtonIndex
    filtered.removeAll(keepCapacity: true)

    if !searchString.isEmpty {
        for item in items {
            ...
            }
        }

    self.tableView.reloadData()

    }
}

推荐答案

我有同样的问题，基本上如果你的父类有一个 UISearchController 以及你的子类并且你正在设置

I had the same issue and basically if your parent class has a UISearchController as well as your child class and you're setting the

self.definesPresentationController = YES

在您的父类中，您子类的搜索控制器不会显示键盘.我花了一段时间才弄清楚，但这就是正在发生的事情.

in your parent class, your child class' search controller won't have the keyboard showing. Took me a while to figure out but this is what is happening.

解决方法是在父类即将推送子类时设置self.definesPresentationController = NO，并设置self.definesPresentationController = YES父类的 viewWillAppear...

The way to fix it is to set the self.definesPresentationController = NO when your parent class is about to push the child class and set self.definesPresentationController = YES in the viewWillAppear of your parent class...

希望这也能帮助到那里的人.

Hope this helps someone out there too.

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