populate fetched data to tableView using UISearchController - ios

Question

I am fetching data from an API and works fine when i type in a city in console. The problem i am facing now is with UISearchController and tableView in the code below i want to populate my searched city in the tableView. Now it does not show up anything when i run the app, except in my console that logs my request when a searched in the searchbar
LOG:
Search text: London
Creating request..
Task started
City name: London
Success! JSON decoded
this means using the searchfunction with the APIrequest works, except that i cant see it in my tableView
here is my viewController
import UIKit
class ViewController: UIViewController{
#IBOutlet weak var tblView: UITableView!
let mWeather = WeatherAPI()
var weatherArray = [WeatherStruct]()
var filteredWeatherArray : [String] = []
// dummy data
let originalArray = ["gothenburg", "london", "stockholm", "new york", "washington DC", "thailand", "china", "spain", "paris"]
var searching: Bool {
if weatherArray.count > 0 {
return true
} else {
return false
}
}
let searchController: UISearchController = UISearchController(searchResultsController: nil)
override func viewDidLoad() {
super.viewDidLoad()
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "type in your city here"
navigationItem.searchController = searchController
tblView.delegate = self
tblView.dataSource = self
}
}
// MARK: - extensions
extension ViewController: UISearchResultsUpdating {
func updateSearchResults(for searchController: UISearchController) {
let searchText = searchController.searchBar.text ?? "can not search"
print("Search text: \(searchText)")
mWeather.fetchCurrentWeather(city: searchText) { (WeatherStruct) in}
tblView.reloadData()
}
}
// MARK: - Table view data source
extension ViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if searching {
return weatherArray.count // when something is typed on searchbar
}else{
return filteredWeatherArray.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "searchCell", for: indexPath)
if searching {
cell.textLabel?.text = weatherArray[indexPath.row].name
tblView.reloadData()
} else {
cell.textLabel?.text = filteredWeatherArray[indexPath.row]
tblView.reloadData()
}
return cell
}
}
EDIT: as this maybe can help someone to help me = API request handler
func fetchCurrentWeather(city: String, completionHandler: #escaping (WeatherStruct) -> Void) {
// url
let wholeUrl = baseUrlForCurrentWeather + city + appid + metric
let urlString = (wholeUrl)
guard let url: URL = URL(string: urlString) else { return }
// Request
print("Creating request..")
let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
if let unwrappedError = error {
print("Nått gick fel. Error: \(unwrappedError)")
return
}
if let unwrappedData = data {
do {
let decoder = JSONDecoder()
let wdata: WeatherStruct = try decoder.decode(WeatherStruct.self, from: unwrappedData)
print("City name: \(String(describing: wdata.name))")
print("Success! JSON decoded")
completionHandler(wdata)
} catch {
print("Couldnt parse JSON..")
print(error)
}
}
}
// Starta task
task.resume()
print("Task started")
}

Answer 1

You need to update the filteredWeatherArray from the result you are getting from fetchCurrentWeather in your updateSearchResults(for searchController method, here's how:
mWeather.fetchCurrentWeather(city: searchText) { weather in
self.weatherArray = [weather]
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
Edit: Even though the above code might work for you, you might not get the desired result. You are trying to display a list from the array of weatherArray, but when you make a call to fetchCurrentWeather you are getting just one result. I have modified my code to set the one array element to set as the weatherArray and reload.