How to put data to Label from JSON - json

Question

I need to put data that I get with JSON to cityLabel, temperatureLabel, weatherLabel for today and tableview where I Have dateLabel, weatherLabel and min and max temperature label for next 5 days. I know that for table view I need also add UITableViewDataSource. On this moment in Simulator I get clean label with nothing.
Code that I have in WeatherForecast.swift
import Foundation
// MARK: - Welcome
struct WeatherForecast: Codable {
let cod: String
let message, cnt: Int
let list: [List]
let city: City
}
// MARK: - City
struct City: Codable {
let id: Int
let name: String
let coord: Coord
let country: String
let population, timezone, sunrise, sunset: Int
}
// MARK: - Coord
struct Coord: Codable {
let lat, lon: Double
}
// MARK: - List
struct List: Codable {
let dt: Int
let main: MainClass
let weather: [Weather]
let clouds: Clouds
let wind: Wind
let sys: Sys
let dtTxt: String
let rain, snow: Rain?
enum CodingKeys: String, CodingKey {
case dt, main, weather, clouds, wind, sys
case dtTxt = "dt_txt"
case rain, snow
}
}
// MARK: - Clouds
struct Clouds: Codable {
let all: Int
}
// MARK: - MainClass
struct MainClass: Codable {
let temp, feelsLike, tempMin, tempMax: Double
let pressure, seaLevel, grndLevel, humidity: Int
let tempKf: Double
enum CodingKeys: String, CodingKey {
case temp
case feelsLike = "feels_like"
case tempMin = "temp_min"
case tempMax = "temp_max"
case pressure
case seaLevel = "sea_level"
case grndLevel = "grnd_level"
case humidity
case tempKf = "temp_kf"
}
}
// MARK: - Rain
struct Rain: Codable {
let the3H: Double
enum CodingKeys: String, CodingKey {
case the3H = "3h"
}
}
// MARK: - Sys
struct Sys: Codable {
let pod: Pod
}
enum Pod: String, Codable {
case d = "d"
case n = "n"
}
// MARK: - Weather
struct Weather: Codable {
let id: Int
let main: MainEnum
let weatherDescription, icon: String
enum CodingKeys: String, CodingKey {
case id, main
case weatherDescription = "description"
case icon
}
}
enum MainEnum: String, Codable {
case clear = "Clear"
case clouds = "Clouds"
case rain = "Rain"
case snow = "Snow"
}
// MARK: - Wind
struct Wind: Codable {
let speed: Double
let deg: Int
}
What I get in ViewController.swift by parsing JSON
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var cityNameLabel: UILabel!
#IBOutlet weak var temperatureLabel: UILabel!
#IBOutlet weak var weatherNowLabel: UILabel!
#IBOutlet weak var dailyWeatherTableView: UITableView!
var degreeSymbol = "º"
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
currentWeatherRequest()
}
func currentWeatherRequest() {
let session = URLSession.shared
let weatherURL = URL(string: "http://api.openweathermap.org/data/2.5/forecast?q=Atlanta,us?&units=metric&APPID=apikey")!
let dataTask = session.dataTask(with: weatherURL) { (data: Data?,response: URLResponse?,error: Error?) in
if let error = error {
print("Error:\n\(error)")
} else {
if let data = data {
do {
let dataString = String(data: data, encoding: String.Encoding.utf8)
print("Daily weather data:\n\(dataString!)")
let decoder = JSONDecoder()
let responseModel = try decoder.decode(WeatherForecast.self, from: data)
print(responseModel)
// } else {
// print("Error: unable to convert json data")
// }
} catch let error {
print("Error: \(error)")
}
}else {
print("Error: did not receive data")
}
}
}
dataTask.resume()
}
func weatherDetails(){
print(City.self)
}
/* func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
<#code#>
}*/
}

Answer 1

You can assign values to your labels after API Manager gets the values below
let responseModel = try decoder.decode(WeatherForecast.self, from: data)
print(responseModel)
by saying for example : cityNameLabel.text = responseModel.city.name
For the tableView make sure to set dailyWeatherTableView delegate and datasource using storyBoard or programmatically in view didload by writing
dailyWeatherTableView.delegate = self
dailyWeatherTableView.dataSource = self