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()
}
}
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!
答案 0 :(得分:24)
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。