回答編集履歴

- ```Swift

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- import Foundation

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- struct MetaData: Codable {

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- let allcount: Int

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- }

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- struct NoveiOverview: Codable {

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- var title: String

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- var ncode: String

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- var userid: Int

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- var writer: String

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- var story: String

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- var generalLastup: String

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- var globalPoint: Int

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- enum CodingKeys: String, CodingKey {

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- case title = "title"

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- case ncode = "ncode"

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- case userid = "userid"

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- case writer = "writer"

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- case story = "story"

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- case generalLastup = "general_lastup"

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- case globalPoint = "global_point"

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- }

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- }

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- struct NovelOverviewList {

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- let metaData: MetaData

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- let novelOverviews: [NoveiOverview]

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- init(metaData: MetaData, novelOverviews: [NoveiOverview]) {

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- self.metaData = metaData

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- self.novelOverviews = novelOverviews

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- print(self.metaData)

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- print(self.novelOverviews)

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- }

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- }

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- extension NovelOverviewList: Decodable {

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- init(from decoder: Decoder) throws {

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- var meta: MetaData = MetaData(allcount: 0)

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- var overviews: [NoveiOverview] = []

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- var unkeyedContainer = try decoder.unkeyedContainer()

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- while !unkeyedContainer.isAtEnd {

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- // unkeyedContainer.currentIndex: decodeが成功するたびにインクリメントされる

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-

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- do {

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- // index 0: MetaData

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- if unkeyedContainer.currentIndex == 0 {

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- meta = try unkeyedContainer.decode(MetaData.self)

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- } else {

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- let overview = try unkeyedContainer.decode(NoveiOverview.self)

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- overviews.append(overview)

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- }

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- print("error")

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- }

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- }

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- self.init(metaData: meta, novelOverviews: overviews)

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- }

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- }

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- ```