类型不匹配。预期解码 Dictionary<String, Any> 但找到了一个数组
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【中文标题】类型不匹配。预期解码 Dictionary<String, Any> 但找到了一个数组【英文标题】：typeMismatch. Expected to decode Dictionary<String, Any> but found an array instead 【发布时间】：2021-11-03 01:30:35 【问题描述】：我找不到这个问题的答案。我正在尝试解析包含元素数组的 JSON 响应。这就是我从端点获取数据的方法：
func getCarruseles(completion: @escaping (Result<[CarruselesData], Error>)-> Void)
let urlString = baseUrl + "url"
guard let url = URL(string: urlString) else
completion(.failure(NetworkingError.badUrl))
return
var request = URLRequest(url: url)
request.httpMethod = "GET"
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.setValue("Bearer token", forHTTPHeaderField: "Authorization")
let session = URLSession.shared
let task = session.dataTask(with: request) (data, response, error) in
DispatchQueue.main.async
if let unwrappedError = error
completion(.failure(unwrappedError))
return
if let unwrappedData = data
do
let json = try JSONSerialization.jsonObject(with: unwrappedData, options: [])
if let successRes = try? JSONDecoder().decode([CarruselesData].self, from: unwrappedData)
completion(.success(successRes))
else
let errorResponse = try JSONDecoder().decode(CarruselesErrorResponse.self, from: unwrappedData)
print("Error \(errorResponse)")
completion(.failure(errorResponse))
catch
completion(.failure(error))
task.resume()
这是我用来解析数据的结构：
struct CarruselesData: Codable
let title: String
let type: String
let items: [Carrusel]
struct Carrusel: Codable
let title: String
let imageUrl: String
let videoUrl: String
let description: String
这是我得到的回应：
(
items = (
description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
imageUrl = "http://placeimg.com/640/480/any";
title = "Movie 1";
videoUrl = "https://d11gqohmu80ljn.cloudfront.net/128/media-20210712191955-cbdi-0.m3u8/master.m3u8";
,
description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
imageUrl = "http://placeimg.com/640/480/any";
title = "Movie 2";
videoUrl = "https://d11gqohmu80ljn.cloudfront.net/128/media-20210712191955-cbdi-0.m3u8/master.m3u8";
,
description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
imageUrl = "http://placeimg.com/640/480/any";
title = "Movie 3";
,
description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
imageUrl = "http://placeimg.com/640/480/any";
title = "Movie 4";
videoUrl = "https://d11gqohmu80ljn.cloudfront.net/128/media-20210712191955-cbdi-0.m3u8/master.m3u8";
);
title = "Carousel Thumb";
type = thumb;
,
items = (
description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
imageUrl = "http://placeimg.com/320/480/any";
title = "Movie 1";
videoUrl = "https://d11gqohmu80ljn.cloudfront.net/128/media-20210712191955-cbdi-0.m3u8/master.m3u8";
,
description = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
imageUrl = "http://placeimg.com/320/480/any";
title = "Movie 2";
);
title = "Carousel Poster";
type = poster;
)
这是我得到的错误： typeMismatch(Swift.Dictionary
【问题讨论】：
【参考方案1】：问题在于，在 items 数组中，并非所有项目都包含“videoURL”。为了解决这个问题，我只需要将 Carrusel 结构的 videoUrl 参数设置为 Optional，如下所示：
struct Carrusel: Codable
let title: String
let imageUrl: String
let videoUrl: String?
let description: String
【讨论】：
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