我试图在Swift中使用JSONDecoder将JSON转换为Structs，所以我编写了所有Structs，将它们修改了几个小时，但它仍然给我这个错误。我不知道是否有办法查看给出此信息的行。我将在下面发布我的struct，并在其后发布Json File链接。
完整的错误描述是：
typeMismatch（Swift.Dictionary ，Swift.DecodingError.Context（codingPath：[]，debugDescription：“预期对Dictionary 进行解码，但找到了一个数组。”，底层错误：nil））
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// Created by Breno Ramos on 28/12/17. // Copyright © 2017 brenor2. All rights reserved. // import Foundation struct Owner:Decodable { let login : String? let id : Double? let avatar_url : String? let gravatar_id : String? let url : String? let html_url : String? let followers_url : String? let following_url : String? let gists_url : String? let starred_url : String? let subscriptions_url : String? let organizations_url : String? let repos_url : String? let events_url : String? let received_events_url : String? let type : String? let site_admin : Bool? } struct License:Decodable { let key : String? let name : String? let spdx_id : String? let url : String? } struct Repo:Decodable { let id : Double? let name : String? let full_name : String? let owner : Owner? let `private` : Bool? let html_url : String? let description : String? let fork : Bool? let url : String? let forks_url : String? let keys_url : String? let collaborators_url : String? let teams_url : String? let hooks_url : String? let issue_events_url : String? let events_url : String? let assignees_url : String? let branches_url : String? let tags_url : String? let blobs_url : String? let git_tags_url : String? let git_refs_url : String? let trees_url : String? let statuses_url : String? let languages_url : String? let stargazers_url : String? let contributors_url : String? let subscribers_url : String? let subscription_url : String? let commits_url : String? let git_commits_url : String? let comments_url : String? let issue_comment_url : String? let contents_url : String? let compare_url : String? let merges_url : String? let archive_url : String? let downloads_url : String? let issues_url : String? let pulls_url : String? let milestones_url : String? let notifications_url : String? let labels_url : String? let releases_url : String? let deployments_url : String? let created_at : String? let updated_at : String? let pushed_at : String? let git_url : String? let ssh_url : String? let clone_url : String? let svn_url : String? let homepage : String? let size : Double? let stargazers_count : Double? let watchers_count : Double? let language : String? let has_issues : Bool? let has_projects : Bool? let has_downloads : Bool? let has_wiki : Bool? let has_pages : Bool? let forks_count : Double? let mirror_url : String? let archived : Bool? let open_issues_count : Double? let license : License? let forks : Double? let open_issues : Double? let topics : Topic? let permissions : Permissions? let watchers : Double? let default_branch : String? // let score : Double? // let subscribers_count : Double? // let network_count : Double? // let allow_rebase_merge: Bool? // let allow_squash_merge: Bool? // let allow_merge_commit: Bool? } struct Topic:Decodable { let topics : [String]? } struct Permissions:Decodable { let admin : Bool let push : Bool let pull : Bool } struct RepoList:Decodable{ let total_count : Int? let incomplete_results : Bool? let items : [Repo]? } struct User:Decodable { let login: String? let id: Double? let avatar_url: String? let gravatar_id: String? let url: String? let html_url: String? let followers_url: String? let following_url: String? let gists_url: String? let starred_url: String? let subscriptions_url: String? let organizations_url: String? let repos_url: String? let events_url: String? let received_events_url: String? let type: String? let site_admin: Bool? } struct Creator:Decodable { let login: String? let id: Double? let avatar_url: String? let gravatar_id: String? let url: String? let html_url: String? let followers_url: String? let following_url: String? let gists_url: String? let starred_url: String? let subscriptions_url: String? let organizations_url: String? let repos_url: String? let events_url: String? let received_events_url: String? let type: String? let site_admin: Bool? } struct Link:Decodable { let href :String? } struct _Links:Decodable { let `self` :Link? let html :Link? let issue :Link? let comments :Link? let review_comments :Link? let review_comment :Link? let commits :Link? let statuses :Link? } struct Base:Decodable { let label :String? let ref :String? let sha :String? let user :User? let repo :Repo? } struct Head:Decodable { let label :String? let ref :String? let sha :String? let user :User? let repo :Repo? } struct Milestone:Decodable { let url:String? let html_url:String? let labels_url:String? let id: Double? let number:Double? let title:String? let description:String? let creator:Creator? let open_issues:Double? let closed_issues:Double? let state:String? let created_at:String? let updated_at:String? let closed_at:String? let due_on:String? } struct Assignee:Decodable { let login :String? let id :Double? let avatar_url :String? let gravatar_id :String? let url :String? let html_url :String? let followers_url :String? let following_url :String? let gists_url :String? let starred_url :String? let subscriptions_url :String? let organizations_url :String? let repos_url :String? let events_url :String? let received_events_url :String? let type :String? let site_admin :Bool? } struct Reviewers:Decodable { let login: String? let id: Double? let avatar_url: String? let gravatar_id: String? let url: String? let html_url: String? let followers_url: String? let following_url: String? let gists_url: String? let starred_url: String? let subscriptions_url: String? let organizations_url: String? let repos_url: String? let events_url: String? let received_events_url: String? let type: String? let site_admin: Bool? } struct Pull:Decodable { let id: Double? let url:String? let html_url:String? let diff_url:String? let patch_url:String? let issue_url:String? let number:Double? let state:String? let locked:Bool? let title:String? let user:User? let body:String? let created_at:String? let updated_at:String? let closed_at:String? let merged_at:String? let merge_commit_sha: String? let assignee: Assignee? let assignees: [Assignee]? let requested_reviewers: [Reviewers]? let milestone:Milestone? let commits_url:String? let review_comments_url:String? let review_comment_url:String? let comments_url:String? let statuses_url:String? let head:Head? let base:Base? let _links:_Links? let author_association:String? } struct PullList:Decodable { let pulls:[Pull]? } /////////////////////////////////////////////////////////
1. 此结构在以下结构上正常工作： 2. 此结构产生typeMismatch错误
您现在可能正在执行此操作：
let decoder = JSONDecoder() let repoList = decoder.decode(RepoList.self, from: data)
这对于使用顶级对象的响应是很好的。
要解码作为顶级数组的JSON响应，请改用如下代码：
let decoder = JSONDecoder() let repos = decoder.decode([Repo].self, from: data)
