为来自 API 的数据的 tableView 单元格设置 UISearchController

Question

我真的很难为我的 tableView 实现 UISearchController，我按照 Sean Allen 的视频解释并像他一样做了，但我想问题出在我身上，我想不通。

我希望当用户想要搜索要实时更新的单元格时，他正在打字并且他将搜索的主要内容是 cell.veturaOutlet.text = currentVechicle.Plate

如果你有时间帮忙，请帮忙，因为我是 Swift 的新手，我真的很喜欢它，只是一开始每个人遇到的这些小问题

this is a pic of how the cells looks like!

class MonitorimiViewController: UIViewController {


@IBOutlet weak var monitorimiTableView: UITableView!
@IBOutlet weak var loaderMonitorimi: UIActivityIndicatorView!


var listOfVechicle: [Vehicles] = []
var filteredVehicles: [Vehicles] = []
var listOfVehicles = [Vehicles]()    


override func viewDidLoad() {
    super.viewDidLoad()
    fetchAndReloadData()
    configureSearchController()
    
    loaderMonitorimi.hidesWhenStopped = true
    loaderMonitorimi.startAnimating()
    
    Timer.scheduledTimer(withTimeInterval: 5, repeats: false) { [self] _ in
        monitorimiTableView.reloadData()
        configureTableView()
        loaderMonitorimi.stopAnimating()
    }
}


func configureTableView() {
    monitorimiTableView.delegate = self
    monitorimiTableView.dataSource = self
    monitorimiTableView.rowHeight = 225
}

func configureSearchController() {
    let searchController = UISearchController()
    searchController.searchResultsUpdater = self
    searchController.searchBar.delegate = self
    searchController.searchBar.placeholder = "Search"
    navigationItem.searchController = searchController
}


func fetchAndReloadData(){
    APICaller.shared.getVehicles(for: APICaller.shared.id!) {[weak self] (result) in
        guard let self = self else { return }
        
        switch result {
        case .success(let vehicle):
            self.listOfVechicle = vehicle
            DispatchQueue.main.async {
                self.monitorimiTableView.reloadData()
            }
        case .failure(let error):
            print(error)
      }
    }
  }
}


    extension MonitorimiViewController: UITableViewDelegate, UITableViewDataSource, UISearchResultsUpdating, UISearchBarDelegate{
func updateSearchResults(for searchController: UISearchController) {
    guard let filter = searchController.searchBar.text, !filter.isEmpty else { return 
    }
    
    filteredVehicles = filteredVehicles.filter { [=11=].Plate!.lowercased().contains(filter.lowercased()) }
    monitorimiTableView.reloadData()
    }


func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return listOfVechicle.count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(withIdentifier: "monitorimiCell", for: indexPath) as? MyCustomCell1 else {return UITableViewCell()}
    let currentVechicle = listOfVechicle[indexPath.row]
    
    
    cell.veturaOutlet.text = currentVechicle.Plate
    cell.shpejtsiaAktualeOutlet.text = currentVechicle.Speed!
    cell.perditsuarOutlet.text = "\(currentVechicle.LastCommunicationDate!.convertToDisplayForm())"
    cell.pasagjereOutlet.text = "\(currentVechicle.Passengers!) Person/a"
    cell.vozitesiOutlet.text = "\(currentVechicle.Driver!)"

    
    return cell
  }
}

Answer 1

你可以使用这个：

var initialListOfVechicles: [Vehicles] = []
var vehicles: [Vehicles] = []

保留一个包含所有数据 (initialListOfVechicles)，另一个 (vehicles) 用于操作列表（即过滤）并填充 tableView。

APICaller.shared.getVehicles(for: APICaller.shared.id!) {[weak self] (result) in
    guard let self = self else { return }
        
    switch result {
    case .success(let vehicle):
        self.initialListOfVechicles = vehicle
        self.vehicles = self.initialListOfVechicles
        ...
}



func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return vehicles.count
}


func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell = tableView.dequeueReusableCell(withIdentifier: "monitorimiCell", for: indexPath) as? MyCustomCell1 else {return UITableViewCell()}
    let currentVechicle = vehicles[indexPath.row]
    ...
}

当你想过滤时：

func updateSearchResults(for searchController: UISearchController) {
    guard let filter = searchController.searchBar.text, !filter.isEmpty else { 
        vehicles = initialListOfVechicles
        monitorimiTableView.reloadData()
        return
    }
    
    vehicles = initialListOfVechicles.filter { [=12=].Plate!.lowercased().contains(filter.lowercased()) }
    monitorimiTableView.reloadData()
}

旁注：
[=15=].Plate! 如果 Plate 为 nil，这将导致崩溃。即，为什么它在第一个地方是可选的？
建议以小写开头的变量命名，因此应该是 plate 而不是 Plate。如果来自 JSON，你可以使用 CodingKeys 来正确匹配它们（即 plate 是键 Plate），并使用 keyDecodingStrategy.

为来自 API 的数据的 tableView 单元格设置 UISearchController

set up UISearchController for tableView cells for data coming from API

xcode

swift