swift - 将 UISearchBar 与 Firebase 数据库一起使用

Question

我正在尝试将 UISearchBar 与 Firebase 一起使用，但是当我尝试输入任何正确的词时出现错误

• 我的代码是

  @IBOutlet weak var tableView: UITableView!
  @IBOutlet weak var searchBar: UISearchBar!
  var isSearching: Bool = false
  //list to store all the artist
  var hotelList = [hotelsModel]()
  var filterHotels = [hotelsModel]()
  func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
  
  if isSearching{
      return filterHotels.count
  } else {
  return hotelList.count
    }
  }
  
  func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
  //creating a cell using the custom class
  let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! hotelsTableViewCell
  
  //the artist object
  let hotel: hotelsModel
  //getting the artist of selected position
  hotel = hotelList[indexPath.row]
  
  //adding values to labels
  cell.lblName.text = hotel.name
  cell.lblLocation.text = hotel.location
  cell.appSuggest.text = hotel.appSuggest
  cell.price.text = hotel.price
  cell.canceletion.text = hotel.cancelation
  cell.paymentNeeded.text = hotel.paymentNeeded
  if isSearching{
      cell.lblName?.text = filterHotels[indexPath.row].name
  }
  
  return cell
  }
  func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
  
  if searchBar.text == nil || searchBar.text == "" {
      isSearching = false
      view.endEditing(true)
      tableView.reloadData()
  } else {
      isSearching = true
      filterHotels = hotelList.filter({$0.name == searchBar.text})
      tableView.reloadData()
  }
  }
  

• 在这一行

  if isSearching{
  
      cell.lblName?.text = filterHotels[indexPath.row].name
  }
  

  

• 这是我的代码文件如果有人可以检查一下

  https://github.com/HaMaDaRaOuF/UISearchBar-Firabse

谢谢

Answer 1

我会建议你改变过滤过程(smth like this):

func filterContentForSearchText(_ searchText: String) {

    let pred = NSPredicate(format: "name contains[cd] %@", searchText)
    filteredHotels = hotelList?.filtered(using: pred) as? [hotelsModel]

    tableView.reloadData()
}

并将 isSearching 变量更改为:

var isSearching: Bool {
    return searchBar.text != ""
}

使用调试器查看导致崩溃的行上的 indexPath.row 值。