Cant pass data between view controllers using segue - ios

Question

I am trying to get my app to call to an API, retrieve information about a movie based on a user search, and then pass that data to the next view using segue. Everything seems to be working fine up until the point where the data is supposed to be getting transferred over. My two view controllers and the file where i call my API are below.
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var searchBar: UISearchBar!
var movieManager = MovieManager()
var movieTitle = ""
var movieDescription = ""
var results: [Results] = []
override func viewDidLoad() {
movieManager.delegate = self
super.viewDidLoad()
// Do any additional setup after loading the view.
}
}
//MARK: - Movie Manager Methods
extension ViewController: MovieManagerDelegate {
func didUpdateMovie(title: String?, description: String?, resultsList: [Results]?) {
movieTitle = title!
movieDescription = description!
results = resultsList!
print("\(movieTitle) \n \(movieDescription)")
}
func didFailWithError(error: Error) {
print("error")
}
}
//MARK: - Search Bar Methods
extension ViewController: UISearchBarDelegate {
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
movieManager.searchMovie(for: searchBar.text!)
searchBar.text = ""
searchBar.resignFirstResponder()
performSegue(withIdentifier: "goToResults", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToResults" {
if let destinationVC = segue.destination as? ResultsListViewController {
destinationVC.movieTitle = self.movieTitle
}
}
}
func searchBarShouldEndEditing(_ searchBar: UISearchBar) -> Bool {
searchBar.resignFirstResponder()
return true
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
}
import UIKit
class ResultsListViewController: UIViewController {
#IBOutlet weak var movieName: UILabel!
var movieTitle: String = ""
override func viewDidLoad() {
super.viewDidLoad()
movieName.text = movieTitle
}
}import UIKit
class ResultsListViewController: UIViewController {
#IBOutlet weak var movieName: UILabel!
var movieTitle: String = ""
override func viewDidLoad() {
super.viewDidLoad()
movieName.text = movieTitle
}
}
import Foundation
protocol MovieManagerDelegate {
func didUpdateMovie(title: String?, description: String?, resultsList: [Results]?)
func didFailWithError(error: Error)
}
struct MovieManager {
var movieTitle: String?
var movieDescription: String?
var results: [Results]?
var delegate: MovieManagerDelegate?
let baseURL = "https://imdb-api.com/en/API/SearchMovie/(APIKEYHERE)/"
func searchMovie(for userSearch: String){
let urlString = "\(baseURL)\(userSearch)"
if let url = URL(string: urlString){
let session = URLSession(configuration: .default)
let task = session.dataTask(with: url) { data, response, error in
if error != nil {
self.delegate?.didFailWithError(error: error!)
return
}
if let safeData = data {
let movieInfo = self.parseJSON(safeData)
self.delegate?.didUpdateMovie(title: movieInfo.0!, description: movieInfo.1!, resultsList: movieInfo.2)
}
}
task.resume()
}
}
func parseJSON(_ data: Data) -> (String?, String?, [Results]) {
let decoder = JSONDecoder()
var movieTitle = "", movieDescription = "", searchResults: [Results] = []
do {
if let decodedData = try decoder.decode(MovieData?.self, from: data) {
movieTitle = decodedData.results.first!.title
movieDescription = decodedData.results.first!.description
searchResults = decodedData.results
// print("\(movieTitle) \n \(movieDescription)")
}
return (movieTitle, movieDescription, searchResults)
} catch {
print(error)
}
return (movieTitle, movieDescription, searchResults)
}
}

Answer 1

Problem is Segue to next controller before the result of API.
Try to Segue after API result
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
movieManager.searchMovie(for: searchBar.text!)
searchBar.text = ""
searchBar.resignFirstResponder()
//Segue to next controller before the result of API
performSegue(withIdentifier: "goToResults", sender: self)
}
So your segue to next controller would be after result of parseJSON or didUpdate delegate