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[英]Elegant solutions to decoding a JSON nested array in swift using decodable
[英]Decoding Huge JSON Array URL using swift
我想從這個巨大的JSON陣列來解碼數據https://coronavirus-19-api.herokuapp.com/countries我有運氣按國家解碼或使用總統計全球https://開頭冠狀-19-API .herokuapp.com/all通過執行以下操作
//
// GlobalSwiftViewController.swift
// Universal
//
// Created by JOE on 3/20/20.
import UIKit
final class StatSwiftViewController: UIViewController {
// THESE LABELS WILL RETRIEVE THE FOLLOWING DATA FROM THE URL: THE CASE , DEATH AND RECOVERED DATA
@IBOutlet weak var CaseLable: UILabel!
@IBOutlet weak var DeathLable: UILabel!
@IBOutlet weak var RecoveredLabel: UILabel!
struct JSONTest: Decodable {
let cases: Double
let deaths: Float
let recovered: Int?
}
override func viewDidLoad() {
super.viewDidLoad()
let urlString = "https://coronavirus-19-api.herokuapp.com/all"
guard let url = URL(string: urlString) else { return }
URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil {
print(error!.localizedDescription)
}
guard let data = data else { return }
do {
//Decode data
let urlString = try JSONDecoder().decode(JSONTest.self, from: data)
let numberFormatter = NumberFormatter()
numberFormatter.numberStyle = .decimal
//HERE WE ARE SHOWING TO THE USER THE DATA FROM THE URL ABOVE
DispatchQueue.main.async {
self.CaseLable.text = numberFormatter.string(for: urlString.cases)
self.DeathLable.text = numberFormatter.string(for: urlString.deaths)
self.RecoveredLabel.text = numberFormatter.string(for: urlString.recovered)
//self.timeLabel.text = JSONTest.deaths
}
} catch let jsonError {
print(jsonError)
}
}.resume()
}
}
現在我正在嘗試解碼此 URL https://coronavirus-19-api.herokuapp.com/countries 中的所有數據以顯示在一個視圖控制器中,我通過使用單個 URL https://取得了成功冠狀病毒-19-api.herokuapp.com/countries/china通過添加更多變量和標簽,使用上述相同代碼的國家/地區但是,我無法通過添加每個國家/地區的每個 URL 或使用主要所有國家/地區的URL https://coronavirus-19-api.herokuapp.com/countries因此,如何使用所有國家/地區的 URL 構建所有數組列表? 注意:我正在嘗試編輯/更新我上面的代碼以在不安裝額外的 pod 或文件的情況下獲得盡可能多的結果......
嘗試調整您的模型以解碼國家/地區數據。
您可以在 Playground 中對此進行測試:
import Foundation
struct JSONTestElement: Codable {
let country: String
let cases, todayCases, deaths, todayDeaths: Int
let recovered, active, critical, casesPerOneMillion: Int
}
typealias JSONTest = [JSONTestElement]
func decode() {
let urlString = "https://coronavirus-19-api.herokuapp.com/countries"
guard let url = URL(string: urlString) else { return }
URLSession.shared.dataTask(with: url) { (data, response, error) in
if error != nil {
print(error!.localizedDescription)
}
guard let data = data else { return }
do {
//Decode data
let countriesData = try JSONDecoder().decode(JSONTest.self, from: data)
let china = countriesData.filter({ $0.country.contains("China")})
print("China data: \(china)")
} catch let jsonError {
print(jsonError)
}
}.resume()
}
decode()
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