UISearchController导致黑屏Swift 2.0

时间:2015-10-22 21:47:15

标签: ios xcode swift uitableview uisearchbar

我在 iOS 9中使用Swift 2.0 时遇到了一个奇怪的问题。我在UISearchController中添加了tableViewController,但这会导致一个奇怪的黑屏问题。当我按下搜索栏并写一些东西时,它显示我的过滤结果没有任何问题,但当我点击另一个标签栏按钮,如书签,之后我点击tableViewController 观看次数最多再次显示黑幕像屏幕截图。

有我的 tableViewController ;

import UIKit

class CitiesTableViewController: UITableViewController, UISearchResultsUpdating {

// MARK: - Class Properties

private var cities = [String]()
private var veterinaries = [Veterinary]()
private var filteredVeterinaries = [Veterinary]()
private var resultSearchController: UISearchController!

// MARK: - TableViewController Life Cycle Methods

override func viewDidLoad() {
    super.viewDidLoad()
    self.getCitiesList()
    self.configureResultsSearchController()
}

override func viewDidDisappear(animated: Bool) {
    super.viewDidDisappear(animated)
    self.resultSearchController.active = false
}

// MARK: - Configuring Search Bar Controller

private func configureResultsSearchController() {
    self.resultSearchController = UISearchController(searchResultsController: nil)
    self.resultSearchController.searchResultsUpdater = self
    self.resultSearchController.dimsBackgroundDuringPresentation = false
    self.resultSearchController.hidesNavigationBarDuringPresentation = false
    self.resultSearchController.searchBar.sizeToFit()
    self.resultSearchController.searchBar.placeholder = "Klinik veya ilçe adı"
    self.tableView.tableHeaderView = self.resultSearchController.searchBar
}

// MARK: - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView) -> Int { return 1 }
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if self.resultSearchController.active { return self.filteredVeterinaries.count }
    else { return self.cities.count }
}

// MARK: - Table view Delegate Methods

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    if (self.resultSearchController.active) {
        self.performSegueWithIdentifier(Constants.ShowDetailViewControllerSegueIdentifier, sender: nil)
    } else {
        self.performSegueWithIdentifier(Constants.ShowTownsTableViewControllerSegueIdentifier, sender: nil)
    }
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier(Constants.CellIdentifier, forIndexPath: indexPath)
    if (self.resultSearchController.active) {
        cell.textLabel?.text = self.filteredVeterinaries[indexPath.row].name
        cell.detailTextLabel?.text = self.filteredVeterinaries[indexPath.row].address
        return cell
    } else {
        cell.textLabel?.text = self.cities[indexPath.row]
        return cell
    }
}

// MARK: - PARSE Query Methods

private func getCitiesList() {
    let parseQueries = ParseQueries()
    parseQueries.downloadListData() {
        (let parseResults) in
        if let veterinaries = parseResults as? [Veterinary] {
            self.veterinaries = veterinaries
            for vet in veterinaries {
                if let city = vet.city {
                    self.cities.append(city)
                }
            }
            dispatch_async(dispatch_get_main_queue()) {
                self.cities = HelperMethods().removeDuplicatesAndSort(array: self.cities)
                self.tableView.reloadData()
            }
        }
    }
}

// MARK: - UISearchController Delegate Methods

func updateSearchResultsForSearchController(searchController: UISearchController) {
    self.filteredVeterinaries.removeAll(keepCapacity: false)
    if let searchBarText = searchController.searchBar.text{
        let searchText = searchBarText.lowercaseString
        // Searching with Veterinary Name and Veterinary City
        self.filteredVeterinaries = self.veterinaries.filter({$0.name?.lowercaseString.rangeOfString(searchText) != nil})
        self.filteredVeterinaries += self.veterinaries.filter({$0.town?.lowercaseString.rangeOfString(searchText) != nil})
        tableView.reloadData()
    }
}

这是来自iOS 9模拟器的黑屏图像,与真实设备相同。 enter image description here

我认为当我点击searchBar时它会消除我的tableView,它无法再次初始化。这是一个错误还是什么?

我该如何解决这个问题?

谢谢!

2 个答案:

答案 0 :(得分:24)

朋友,在viewDidLoad()插入此代码行:

self.definesPresentationContext = true

看看我如何放(第29行):

click here to see

答案 1 :(得分:0)

我最近遇到了同样的问题,我可以轻松解决。 已在 viewDidLoad()中定义self.definesPresentationContext = true,但未解决此问题。

在上述问题中,您可能会在点按 MostViewed 标签栏项时直接显示CitiesTableViewController

为了避免黑屏,您可以在UINavigationController中嵌入 CitiesTableViewController ,并在点击tabbar项时尝试显示navigationcontroller。

此解决方案可避免黑屏问题。