你好我的搜索功能有一个非常奇怪的问题。我已经成功实现了搜索功能。我正在从后端服务获取数据。问题是在某些阶段，根据键入的关键字，建议区域（tableView）中的数据没有准确加载。我还在控制台上打印了结果，以检查我是否获得了针对关键字的准确结果，并且控制台显示了准确的结果，只是建议区域有时不会加载准确的结果。例如在我的应用程序中如果我想搜索城市“拉合尔”。我输入了完整的字母“拉合尔”
它表明了这一点
但是当我按 x 图标或退格键删除“e”时，它会显示准确的结果
我只是作为一个例子来展示它。这几乎一直在发生。你能看看我的代码，看看我在做什么错吗？
class CountryTableViewController: UITableViewController, UISearchResultsUpdating {
var dict = NSDictionary()
var filteredKeys = [String]()
var resultSearchController = UISearchController()
var newTableData = [String]()
override func viewDidLoad() {
super.viewDidLoad()
self.resultSearchController = ({
let controller = UISearchController(searchResultsController: nil)
controller.searchResultsUpdater = self
controller.dimsBackgroundDuringPresentation = false
controller.searchBar.sizeToFit()
self.tableView.tableHeaderView = controller.searchBar
return controller
})()
self.tableView.reloadData()
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (self.resultSearchController.active) {
return self.filteredKeys.count
} else {
return dict.count
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CountryTableViewCell
if(self.resultSearchController.active){
let cityName = (((self.dict["\(indexPath.row)"] as?NSDictionary)!["Country"] as?NSDictionary)!["city_name"] as?NSString)
let stateName = (((self.dict["\(indexPath.row)"] as?NSDictionary)!["Country"] as? NSDictionary)!["state_name"] as? NSString)
let shortName = (((self.dict["\(indexPath.row)"] as?NSDictionary)!["Country"] as? NSDictionary)!["short_country_name"] as? NSString)
if (cityName != "-" || shortName != "-"){
cell.stateNameLabel.text = stateName as? String
cell.cityNameLabel.text = cityName as? String
cell.shortNameLabel.text = shortName as? String
}
return cell
}else{
if let cityName = (((self.dict["\(indexPath.row)"] as?NSDictionary)!["Country"] as?NSDictionary)!["city_name"] as?NSString){
cell.cityNameLabel.text = cityName as String
}
return cell
}
}
func updateSearchResultsForSearchController(searchController: UISearchController) {
let searchWord = searchController.searchBar.text!
getCountriesNamesFromServer(searchWord)
self.filteredKeys.removeAll()
for (key, value) in self.dict {
let valueContainsCity: Bool = (((value as? NSDictionary)?["Country"] as? NSDictionary)?["city_name"] as? String)?.uppercaseString.containsString(searchWord.uppercaseString) ?? false
let valueContainsCountry: Bool = (((value as? NSDictionary)?["Country"] as? NSDictionary)?["country_name"] as? String)?.uppercaseString.containsString(searchWord.uppercaseString) ?? false
if valueContainsCity || valueContainsCountry{ self.filteredKeys.append(key as! String) }
}
self.tableView.reloadData()
}
func getCountriesNamesFromServer(searchWord:String){
let url:String = "http://localhost"
let params = ["keyword":searchWord]
ServerRequest.postToServer(url, params: params) { result, error in
if let result = result {
print(result)
self.dict = result
}
}
}
}