如何快速解析数组的json数组

Posted 2023-02-03

我是json解析的初学者，我无法解码和解析，请帮助我。

这里是我的模特

struct Welcome: Codable 
let genreID, name, welcomeDescription, slug: String
let url: String
let videos: [Video]


struct Video: Codable 
    let videosID, title, videoDescription, slug: String
    let release, isTvseries, runtime: String
    let videoQuality: VideoQuality
    let thumbnailURL, posterURL: String

和示例

[
"genre_id": "",
"name": "",
"description": "",
"slug": "",
"url": "",
"videos": [
  
    "videos_id": "",
    "title": "",
    "description": "",
    "slug": "",
    "release": "",
    "is_tvseries": "",
    "runtime": "",
    "video_quality": "",
    "thumbnail_url": "",
    "poster_url": ""
  ,
  
    "videos_id": "",
    "title": "",
    "description": "",
    "slug": "",
    "release": "",
    "is_tvseries": "",
    "runtime": " ",
    "video_quality": "",
    "thumbnail_url": "",
    "poster_url": ""
  
], 
"genre_id": "",
"name": "",
"description": " ",
"slug": "",
"url": "",
"videos": [
  
    "videos_id": "",
    "title": " ",
    "description": "",
    "slug": "",
    "release": "",
    "is_tvseries": "",
    "runtime": "",
    "video_quality": "",
    "thumbnail_url": "",
    "poster_url": ""
  ,
  
    "videos_id": "",
    "title": "",
    "description": "",
    "slug": "",
    "release": "",
    "is_tvseries": "",
    "runtime": "",
    "video_quality": "",
    "thumbnail_url": "",
    "poster_url": ""
  
]  ]

我想在响应块中使用JSONDecoder()。我想通过completionHandler解析从响应到vc的json数据。和一些完成专家，请对此进行解释，以便我解决我的问题。

答案

从API /本地获取Data后，您需要decode如下所示的响应，

do 
   let data = //Data from the API
   let welcomeList = try JSONDecoder().decode([Welcome].self, from: data)
   welcomeList.forEach  welcome in 
       welcome.videos.forEach video in 
          print(video.videosID)
       
   
 catch 
   print(error)

要获取免费的解析和模型代码，您始终可以将JSON放在此web app中。但是，您必须注意可选属性，默认情况下，模型属性保持为非可选，因此，如果您知道可以作为响应返回的任何属性nil，请将其设置为可选（？）。

另一答案

class videosDetail: Codable 
    let genreId: String?
    let name: String?
    let welcomeDescription: String?
    let slug: String?
    let url: String?
    let videos: [Video]?

    enum CodingKeys: String, CodingKey 
        case genreId = "genre_id"
        case name = "name"
        case welcomeDescription = "description"
        case slug = "slug"
        case url = "url"
        case videos = "videos"
    


// MARK: - Video
class Video: Codable 
    let videosId: String?
    let title: String?
    let videoDescription: String?
    let slug: String?
    let release: String?
    let isTvseries: String?
    let runtime: String?
    let videoQuality: String?
    let thumbnailUrl: String?
    let posterUrl: String?

    enum CodingKeys: String, CodingKey 
        case videosId = "videos_id"
        case title = "title"
        case videoDescription = "description"
        case slug = "slug"
        case release = "release"
        case isTvseries = "is_tvseries"
        case runtime = "runtime"
        case videoQuality = "video_quality"
        case thumbnailUrl = "thumbnail_url"
        case posterUrl = "poster_url"
    

在常用功能中添加此方法

func getArrayViaCodable<T : Codable>(arrDict : [[String : Any]]) -> [T]? 
    if let jsonData = try?  JSONSerialization.data(
        withJSONObject: arrDict,
        options: .prettyPrinted
        )
        do 
            let posts = try JSONDecoder().decode([T].self, from: jsonData)
            return posts
         catch 
            print(error)
            return nil
        
     else 
        return nil
    

通过上述方法传递字典数组