空对象阻止 JSON 可解码在 swift 中工作

Question

有没有办法绕过空对象以确保可解码 JSON 正常工作？我附上了 JSON.

的图片

import UIKit

struct SearchResultData: Decodable  {
    let server_response_time: Int
    let data: [SearchResultType]
    let success: Bool
}

struct SearchResultType: Decodable  {
    let group: String
    let data: [Movie]
}

struct Movie: Decodable {
    let title: String
}

我在运行应用程序时收到此错误。

Failed to decode JSON: keyNotFound(CodingKeys(stringValue: "title", intValue: nil), Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "data", intValue: nil), _JSONKey(stringValue: "Index 2", intValue: 2), CodingKeys(stringValue: "data", intValue: nil), _JSONKey(stringValue: "Index 0", intValue: 0)], debugDescription: "No value associated with key CodingKeys(stringValue: \"title\", intValue: nil) (\"title\").", underlyingError: nil))

Answer 1

这个

: "No value associated with key CodingKeys(stringValue: \"title\", intValue: nil) (\"title\").", underlyingError: nil))

意味着 title 在某些部分是 nil 所以让它成为

let title: String?

您可能还需要

let data: [SearchResultType?]

因为 data 键也包含一些空值

Answer 2

只需将 structs

中可能包含 nils 的类型更改为可选类型

struct SearchResultData: Decodable  {
    let server_response_time: Int
    let data: [SearchResultType]
    let success: Bool
}

struct SearchResultType: Decodable  {
    let group: String
    let data: [Movie]
}

struct Movie: Decodable {
    let title: String? // this is nullable variable, 
}

debugDescription: "No value associated with key CodingKeys(stringValue: \"title\", intValue: nil) (\"title\").", underlyingError: nil))<-- as this line says

空对象阻止 JSON 可解码在 swift 中工作

Null object is preventing JSON decodable from working in swift

json

ios

swift

decodable