如何使用swift在表视图中搜索多个数据？

Question

我使用viewController创建一个搜索栏，在viewController中有一个tableview单元格，其中有两个标签名为：countryName和number。我还把uisearchbar放在viewController中。

在这个问题上，我只能搜索不是countryName的数字，

如何搜索数字和countryNames？

我的代码：

模型

import Foundation
import UIKit

struct ModelData {
    var countryName: String
    var numbers: String
}

dateBeliVitzel

class DataTableViewCell: UITableViewCell {
    @IBOutlet weak var numbers: UILabel!
    @IBOutlet weak var countryName: UILabel!
}

视图控制器

import UIKit
import Alamofire
import SwiftyJSON

class ViewController: UIViewController{
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var countrySearch: UISearchBar!

    var searchedCountry = [ModelData]()
    var searching = false
    var dataJson = [modelData]()

    override func viewDidLoad() {
        super.viewDidLoad()

        countrySearch.delegate = self
        fetchData()
    }

    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if searching{
            return searchedCountry.count
        } else{
            return dataJson.count
        }
    } 

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier:"DataTableViewCell", for: indexPath) as! DataTableViewCell
        if searching {
            cell?.numbers.text = searchedCountry[indexPath.row]
            cell?.countryName.text = searchedCountry[indexPath.row]
        } else {
            cell?.numbers.text = dataJson[indexPath.row]
            cell?.countryName.text = dataJson[indexPath.row]
        }
        return cell
    }
}

从url调用json：

func fetchData(){

    DispatchQueue.main.async {

        let url = ""

        Alamofire.request(url, method: .get, encoding: URLEncoding.default).responseJSON{
            (response) in
            switch response.result{
            case .success(let value):
                let json = JSON(value)
                if let data = json["data"].array{
                    for item in data{

                        self.tableView.reloadData()

                        let numbers = item["numbers"].stringValue
                        let countryName = item["countryName"].string

                        let data = ModelData(countryName: countryName, numbers: numbers)
                        self.dataJson.append(data)

                    }
                }

            case .failure(let error):
                print(error)
            }
        }
    }
}

这是扩展viewController：

extension ViewController: UISearchBarDelegate{
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {

        searchedCountry = dataJson.filter({$0.numbers.lowercased().prefix(searchText.count) == searchText.lowercased()})

        searchedCountry = dataJson.filter({$0.countryName.lowercased().prefix(searchText.count) == searchText.lowercased()})         
        searching = true
        self.tableView.reloadData()
    }
}

Answer 1

在你的searchBar函数中，searchedCountry只会搜索countryName：

//This filter will be replaced by the next filter 
searchedCountry = dataJson.filter({$0.numbers.lowercased().prefix(searchText.count) == searchText.lowercased()})

searchedCountry = dataJson.filter({$0.countryName.lowercased().prefix(searchText.count) == searchText.lowercased()}) 

searchedCountry设置两次，numbers过滤器将被countryName取代

您将不得不搜索多个选项，如下所示：

searchedCountry = dataJson.filter({$0.countryName.lowercased().prefix(searchText.count) == searchText.lowercased() || $0.numbers.lowercased().prefix(searchText.count) == searchText.lowercased()})