无法使用 get 请求中的文本解码 json

Question

我需要像这样创建 GET 请求：

https://public-api.nazk.gov.ua/v1/declaration/?q=Чер

https://public-api.nazk.gov.ua/v1/declaration/?q=Володимирович

= 之后的最后一个字符是西里尔符号

我的 get 请求是这样的：

 var hostURL = "https://public-api.nazk.gov.ua/v1/declaration/?q="
hostURL = hostURL + searchConditions

let escapedSearchConditions = hostURL.addingPercentEncoding(withAllowedCharacters:NSCharacterSet.urlQueryAllowed)

let url = URL(string: escapedSearchConditions!)!

请求是： https://public-api.nazk.gov.ua/v1/declaration/?q=%D0%9F%D1%80%D0%BE

来自服务器的 return 必要数据，但无法解码 returned 数据。
它适用于搜索条件中的整数但不适用于西里尔文本（

import Foundation

struct Declarant: Codable {
var id: String
var firstname: String
var lastname: String
var placeOfWork: String
var position: String
var linkPDF: String

}

struct DeclarationInfo: Codable {
let items: [Declarant]

}

导入基金会

struct DeclarationInfoController {

func fetchDeclarationInfo (with searchConditions: String, completion: @escaping(DeclarationInfo?) -> Void) {
    var hostURL = "https://public-api.nazk.gov.ua/v1/declaration/?q="
    hostURL = hostURL + searchConditions

    let escapedSearchConditions = hostURL.addingPercentEncoding(withAllowedCharacters:NSCharacterSet.urlQueryAllowed)

    let url = URL(string: escapedSearchConditions!)!

    print(url)

    let dataTask = URLSession.shared.dataTask(with: url) {
        (data, response, error) in
        let jsonDecoder = JSONDecoder()
        print("Trying to decode data...")

        if let data = data,
            let declarationInfo = try? jsonDecoder.decode(DeclarationInfo.self, from: data) {
            completion(declarationInfo)
            print(declarationInfo)
        } else {
            print("Either no data was returned, or data was not properly decoded.")
            completion(nil)
        }
    }

    dataTask.resume()
}


}


import UIKit

class DeclarationViewController: UIViewController {

let declarationInfoController = DeclarationInfoController()

@IBOutlet weak var searchBar: UISearchBar!

@IBOutlet weak var resultLabel: UILabel!


@IBAction func beginSearchButton(_ sender: UIButton) {
    declarationInfoController.fetchDeclarationInfo(with: searchBar.text!) { (declarationInfo) in
        if let declarationInfo = declarationInfo {
            DispatchQueue.main.async {
                self.resultLabel.text = declarationInfo.items[0].lastname
            }
        }
    }
}

}

Answer 1

更新

if let data = data,
            let declarationInfo = try? jsonDecoder.decode(DeclarationInfo.self, from: data) {
            completion(declarationInfo)
            print(declarationInfo)
        } else {
            print("Either no data was returned, or data was not properly decoded.")
            completion(nil)
        }

来自

 do {
       if let data = data {
        let declarationInfo = try jsonDecoder.decode(DeclarationInfo.self, from: data) 
        completion(declarationInfo)
        print(declarationInfo)
        return
    } catch {
        print(error) 
    }
    completion(nil)

你会打印出错误，你会知道解码失败的原因吗

Answer 2

从不使用try?解码JSON时忽略错误。 Codable 错误具有令人难以置信的描述性，可以准确地告诉您哪里出了问题。

使用总是一个do catch块像

do {
    let declarationInfo = try jsonDecoder.decode(DeclarationInfo.self, from: data)
} catch { print error }

并打印 error 而不是无用的文字字符串。

该错误与西里尔文字无关。

评论中建议的 JSON 结构

struct Item: Codable {
    let id, firstname, lastname, placeOfWork: String
    let position, linkPDF: String
}

揭示了错误（强调了最重要的部分）

keyNotFound(CodingKeys(stringValue: "position", intValue: nil), Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "items", intValue: nil), _JSONKey(stringValue: "Index 11", intValue: 11)], debugDescription: "No value associated with key CodingKeys(stringValue: \"position\", intValue: nil) (\"position\").", underlyingError: nil))

它清楚地描述了在结构 Item 中，数组索引 11 处的项中的键 position 没有值。

解决方案是将这个特定的结构成员声明为可选

struct Item: Codable {
    let id, firstname, lastname, placeOfWork: String
    let position : String?
    let linkPDF: String
}

再次强调：不要忽略错误，它们会帮助您立即解决问题。

无法使用 get 请求中的文本解码 json

unable to decode json with text in get request

json

decode

ios

swift