SearchBar mit benutzerdefinierten Klasse

Question

Ich bin ein Anfänger auf iOS-Entwicklung und ich habe ein Problem, wenn ich versuche, die UISearchBar in einem UITableView zu verwenden. Ich weiß nicht, wie Sie die benutzerdefinierte Klasse in einer Tabellenansicht verwenden, die die Daten mit einer Suchleiste filtert. Bitte, würden Sie das Problem beheben? Unten ist die benutzerdefinierte Klasse:

// Data.swift 
// SearchBarWithTableView 

class Food { 
var FoodName:String = "" 
var FoodQuantity:String = "" 
var FoodGroup:String = "" 
var FoodImage:String = "" 
var FoodCarbs:Int = 0 
var FoodCalories:Int = 0 

init(foodName:String,foodGroup:String,foodQuantity:String,foodImage:String,foodCarbs:Int,foodCalories:Int) { 
    self.FoodName = foodName 
    self.FoodQuantity = foodQuantity 
    self.FoodGroup = foodGroup 
    self.FoodImage = foodImage 
    self.FoodCarbs = foodCarbs 
    self.FoodCalories = foodCalories 
}} 

ViewController.swift

import UIKit 

class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate{ 

    @IBOutlet weak var SearchBarTableView:UITableView! 
    @IBOutlet weak var SearchBar:UISearchBar! 




    var searchActive:Bool=false 
    var filteredData=[Food]() 

    let allData:[Food]=[Food(foodName: "Rice", foodGroup: "Beans", foodQuantity: "5 scope",foodImage:"1S.jpg", foodCarbs:15,foodCalories: 80), 
         Food(foodName: "Apple", foodGroup: "Frutie", foodQuantity: "One",foodImage:"S-2.jpg", foodCarbs: 15, foodCalories: 80), 
         Food(foodName: "ban 1",foodGroup: "Beans",foodQuantity:"One",foodImage:"3S.jpg",foodCarbs: 15,foodCalories: 80), 
         Food(foodName: "ban 2", foodGroup: "Beans", foodQuantity: "half pieace",foodImage:"4-S.jpg", foodCarbs: 25, foodCalories: 140)] 



    override func viewDidLoad() { 

     super.viewDidLoad() 

     SearchBarTableView.delegate=self 
     SearchBarTableView.dataSource=self 
     SearchBar.delegate=self 
     filteredData=allData 
     print(filteredData.count) 
     print("-----------") 
     print(allData.count) 
     SearchBar.returnKeyType=UIReturnKeyType.done 
     definesPresentationContext=true 
    } 
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
      let cell=tableView.dequeueReusableCell(withIdentifier: "cell") 
       var Text:String 
       if searchActive { 
        Text=filteredData[indexPath.row].FoodName 
       }else{ 
        Text=allData[indexPath.row].FoodName 
       } 
       cell?.textLabel?.text=filteredData[indexPath.row].FoodName 
       return cell! 
      } 

     func searchBar(_ searchBar: UISearchBar, textDidChange `searchText: String) {` 
      if SearchBar.text == nil || SearchBar.text == "" { 
       searchActive=false 
       view.endEditing(true) 
       SearchBarTableView.reloadData() 
      }else{ 
       searchActive=true 
    /* here is the problem */ 
       // filteredData=allData.filter({$0 === searchBar.text!}) 
       } 
      } 
     func numberOfSections(in tableView: UITableView) -> Int { 
      return 1 
     } 
     func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 

      if searchActive { 
       return filteredData.count 
      } 
      return allData.count 
     } 

     override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
      if segue.identifier=="Go"{ 
      if let indexPath=SearchBarTableView.indexPathForSelectedRow{ 
       let destinationVC=segue.destination as! DetailsViewController 
       destinationVC.namE=allData[indexPath.row].FoodName 
       destinationVC.quntitY=allData[indexPath.row].FoodQuantity 
       destinationVC.calorieS=allData[indexPath.row].FoodCalories 
       destinationVC.carbS=allData[indexPath.row].FoodCarbs 
      } 
     } 
     } 
    } 

Answer 1

func searchBar(_ searchBar: UISearchBar, textDidChange `searchText: String) {` 
     if SearchBar.text == nil || SearchBar.text == "" { 
      searchActive=false 
      view.endEditing(true) 
      SearchBarTableView.reloadData() 
     }else{ 
      searchActive=true 

       filteredData=allData.filter({$0.FoodName === searchBar.text!}) 
      SearchBarTableView.reloadData() 


      } 
     } 

Answer 2

func updateSearchResults(for searchController: UISearchController) { 
    if let searchText = searchController.searchBar.text, !searchText.isEmpty { 
     self.filteredData = self.allData.filter{ 
      var found = false 
      for str in ($0 as! NSDictionary) { 
       if(str.key as! String == "foodName") 
       { 
        var strin = str.value as! String; 
        strin = strin.lowercased(); 
        let search = searchText.lowercased() 
        found = strin.contains(search); 
       }      
      } 
      return found 
     } 
    } 
    else { 
     self.Array = response as! [Any] 
    } 
    tableView.reloadData() 
} 

Verwendung obige Verfahren.