我有一个实现 UISearchBarDelegate 的 UITableVIewController，该 View 嵌入在导航 Controller 中。

    class FacilityTableViewController: UITableViewController, UISearchResultsUpdating, UISearchBarDelegate, AmenityFilterDelegate {

        // MARK: - Public Variables

        var targetFacilities = [Int]()
        var searchController: UISearchController = UISearchController(searchResultsController: nil)

        // MARK: - Private Variables

        private var viewModel: FacilityTableViewModel!
        private let parkGreenColor = UIColor(red: 73/255, green: 136/255, blue: 84/255, alpha: 1)
        private var showEmptyMessage = false

        // MARK: - View Lifecycle

        /**
        Setup view after loading
        */
        override func viewDidLoad() {
            super.viewDidLoad()

            trackScreenView("Facility Table View")

            if targetFacilities.isEmpty {
                viewModel = FacilityTableViewModel()
            } else {
                viewModel = FacilityTableViewModel(facilityIds: targetFacilities)
            }

            // Seup search controller
            searchController.searchResultsUpdater = self
            searchController.dimsBackgroundDuringPresentation = false
            searchController.hidesNavigationBarDuringPresentation = false
            searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, searchController.searchBar.frame.origin.y, searchController.searchBar.frame.size.width, 44)
            searchController.searchBar.tintColor = UIColor.whiteColor()
            searchController.searchBar.barTintColor = parkGreenColor
            searchController.searchBar.translucent = false

            self.definesPresentationContext = true

            tableView.tableHeaderView = searchController.searchBar
        }

我发现当我禁用导航栏的半透明属性时，搜索框会向下移动它的位置。

如果我设置 definesPresentationContext = false，则搜索栏不会向下移动，但是如果我在搜索框中输入文本并选择其中一个结果，则生成的模态窗口将无法打开。我收到以下错误:

    2015-03-17 15:06:56.101 VB ParkFinder[16368:2667719] Warning: Attempt to present <UINavigationController: 0x7fa2f9ced930>  on <VB_ParkFinder.FacilityTableViewController: 0x7fa2f9c27ba0> which is already presenting (null)

下面是我的segue代码:

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        let navController = segue.destinationViewController as UINavigationController
        if segue.identifier == "facilityDetailsSegue" {
            let detailsViewController = navController.childViewControllers.last as FacilityDetailsViewController

            if let indexPath = tableView.indexPathForSelectedRow() {
                var facilityId: Int
                if searchController.active {
                    facilityId = viewModel.idForSearchResultsAtIndexPath(indexPath)
                } else {
                    facilityId = viewModel.idForFacilityAtIndexPath(indexPath)
                }

                detailsViewController.currentFacilityId = facilityId
            }
        } else if segue.identifier == "FilterPopover" {
            let aftvc = navController.childViewControllers.last as AmenityFilterTableViewController
            aftvc.delegate = self
        }
    }

我不知道该怎么做。我想让导航栏保持半透明关闭状态，并且我需要能够从搜索结果中启动模式窗口。关于如何实现这一点有什么想法吗？

最佳答案

我遇到了同样的问题，看看

Strange UISearchDisplayController view offset behavior in iOS 7 when embedded in navigation bar

这解决了我的问题。

我猜它可能会被标记为重复，但不确定该怎么做。

关于ios - UISearchController 搜索框在点击时向下移动，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29107727/