ios - 从 JSON API 追加到数组中
问题描述
如何使用 JSON 模型类附加到数组中。这是我的 JSON API 请求:https ://developer.github.com/v3/search/
import Foundation
typealias GitDecode = [GitDecodeElement]
struct GitDecodeElement: Codable {
let totalCount: Int
let incompleteResults: Bool
let items: [Item]
enum CodingKeys: String, CodingKey {
case totalCount = "total_count"
case incompleteResults = "incomplete_results"
case items
}
}
struct Item: Codable {
let id: Int
let nodeID, name, fullName: String
let owner: Owner
let itemPrivate: Bool
let htmlURL, description: String
let fork: Bool
let url, createdAt, updatedAt, pushedAt: String
let homepage: String
let size, stargazersCount, watchersCount: Int
let language: String
let forksCount, openIssuesCount: Int
let masterBranch, defaultBranch: String
let score: Double
enum CodingKeys: String, CodingKey {
case id
case nodeID = "node_id"
case name
case fullName = "full_name"
case owner
case itemPrivate = "private"
case htmlURL = "html_url"
case description, fork, url
case createdAt = "created_at"
case updatedAt = "updated_at"
case pushedAt = "pushed_at"
case homepage, size
case stargazersCount = "stargazers_count"
case watchersCount = "watchers_count"
case language
case forksCount = "forks_count"
case openIssuesCount = "open_issues_count"
case masterBranch = "master_branch"
case defaultBranch = "default_branch"
case score
}
}
struct Owner: Codable {
let login: String
let id: Int
let nodeID, avatarURL, gravatarID, url: String
let receivedEventsURL, type: String
enum CodingKeys: String, CodingKey {
case login, id
case nodeID = "node_id"
case avatarURL = "avatar_url"
case gravatarID = "gravatar_id"
case url
case receivedEventsURL = "received_events_url"
case type
}
}
在这里,我有我的班级模型,我在说我想从该响应中提取的内容:
import Foundation
struct Git: Codable{
let totalCount: Int
let items: GitItem
init ( totalCount: Int,
itemID: Int, itemDescription: String,
ownerID: Int, ownerAvatarURL: String) {
self.totalCount = totalCount
self.items = GitItem(id: itemID, description: itemDescription, owner: GitOwner(id: ownerID, avatarURL: ownerAvatarURL))
}
}
struct GitItem: Codable{
let id: Int
let description: String
let owner: GitOwner
}
struct GitOwner: Codable {
let id: Int
let avatarURL: String
}
现在,当我尝试将所有自定义属性附加到我的数组中时,我被卡住了,因为,itemID
和位于不同的类中。itemDescription
ownerID
ownerAvatarURL
以下是我尝试使用 JSONDecoder 从 JSON 获取所有属性的方法:
import UIKit
class MainViewController: UIViewController {
var gitRepositoriesArray = [Git]()
override func viewDidLoad() {
super.viewDidLoad()
}
// Download Git Repositories from API
func parseGitRepositories(){
let url = URL(string: "https://developer.github.com/v3/search/")
URLSession.shared.dataTask(with: url!) { (data, response, error) in
if error == nil{
do{
let gitRepositoriesList = try JSONDecoder().decode(GitDecode.self, from: data!)
for eachRepo in gitRepositoriesList{
self.gitRepositoriesArray.append(Git(totalCount: eachRepo.totalCount,
itemID: <#T##Int#> , itemDescription: <#T##String#>, ownerID: <#T##Int#>, ownerAvatarURL: <#T##String#>))
}
}catch{
print(error.localizedDescription)
}
}
}.resume()
}
}
解决方案
完整的工作操场代码:
针对 Swift 相关存储库的 API 进行搜索。
解析它们,将它们添加到数组中并打印出每个的一些基本信息。(fullName, name, avatarUrl
//: Playground - noun: a place where people can play
import PlaygroundSupport
import UIKit
struct GitDecodeElement: Codable {
let totalCount: Int
let incompleteResults: Bool
let items: [Repo]
enum CodingKeys: String, CodingKey {
case totalCount = "total_count"
case incompleteResults = "incomplete_results"
case items
}
}
struct Repo: Codable {
let id: Int
let nodeID, name, fullName: String
let owner: Owner
let itemPrivate: Bool
let htmlURL, description: String
let fork: Bool
let url, createdAt, updatedAt, pushedAt: String
let homepage: String?
let size, stargazersCount, watchersCount: Int
let language: String?
let forksCount, openIssuesCount: Int
let score: Double
enum CodingKeys: String, CodingKey {
case id
case nodeID = "node_id"
case name
case fullName = "full_name"
case owner
case itemPrivate = "private"
case htmlURL = "html_url"
case description, fork, url
case createdAt = "created_at"
case updatedAt = "updated_at"
case pushedAt = "pushed_at"
case homepage, size
case stargazersCount = "stargazers_count"
case watchersCount = "watchers_count"
case language
case forksCount = "forks_count"
case openIssuesCount = "open_issues_count"
case score
}
}
struct Owner: Codable {
let login: String
let id: Int
let nodeID, avatarURL, gravatarID, url: String
let receivedEventsURL, type: String
enum CodingKeys: String, CodingKey {
case login, id
case nodeID = "node_id"
case avatarURL = "avatar_url"
case gravatarID = "gravatar_id"
case url
case receivedEventsURL = "received_events_url"
case type
}
}
var gitRepositoriesArray = [Repo]()
// Download Git Repositories from API
func parseGitRepositories() {
let url = URL(string: "https://api.github.com/search/repositories?q=topic:swift+topic:ios")
var request = URLRequest(url: url!)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
URLSession.shared.dataTask(with: request) { (data, response, error) in
guard error == nil else {
print(error?.localizedDescription)
return
}
do {
let gitRepositoriesList = try JSONDecoder().decode(GitDecodeElement.self, from: data!)
gitRepositoriesArray = gitRepositoriesArray + gitRepositoriesList.items
print(gitRepositoriesArray.count)
for repo in gitRepositoriesList.items {
print("\(repo.fullName) - \(repo.name) - \(repo.owner.avatarURL)")
}
} catch {
let str = String(data: data!, encoding: .utf8)
print(str)
print(error)
}
}.resume()
}
parseGitRepositories()
PlaygroundPage.current.needsIndefiniteExecution = true
输出:
30
justjavac/free-programming-books-zh_CN - free-programming-books-zh_CN - https://avatars1.githubusercontent.com/u/359395?v=4
dkhamsing/open-source-ios-apps - open-source-ios-apps - https://avatars0.githubusercontent.com/u/4723115?v=4
matteocrippa/awesome-swift - awesome-swift - https://avatars2.githubusercontent.com/u/475463?v=4
xitu/gold-miner - gold-miner - https://avatars2.githubusercontent.com/u/10482599?v=4
lkzhao/Hero - Hero - https://avatars1.githubusercontent.com/u/3359850?v=4
ReactiveX/RxSwift - RxSwift - https://avatars1.githubusercontent.com/u/6407041?v=4
realm/realm-cocoa - realm-cocoa - https://avatars0.githubusercontent.com/u/7575099?v=4
CocoaPods/CocoaPods - CocoaPods - https://avatars1.githubusercontent.com/u/1189714?v=4
CosmicMind/Material - Material - https://avatars1.githubusercontent.com/u/10069574?v=4
// rest truncated
请注意我在代码中使用的模型比您使用的模型少。无需复制代码,只需在需要时使用所需的部分。
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