如何在Swift中使用Ticketmaster API

huangapple
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英文:

How to use ticketmaster API in swift

问题

这是我第一次尝试使用API，我遇到了“keyNotFound”错误。有人能指导我更好地理解这个问题吗？这是他们文档的链接：https://developer.ticketmaster.com/products-and-docs/apis/discovery-api/v2/#anchor_find

  1. let apiKey = "************"
  3. struct EventResponse: Decodable {
  4.     let events: [Event]
  5. }
  7. struct Event: Decodable {
  8.     let id: String?
  9. }
  11. func fetchTMEvents() async throws -> [Event] {
  12.     let urlTM = URL(string: "https://app.ticketmaster.com/discovery/v2/events.json?apikey=\(apiKey)")!
  13.     let (data, _) = try await URLSession.shared.data(from: urlTM)
  14.     let decoded = try JSONDecoder().decode(EventResponse.self, from: data)
  15.     return decoded.events
  16. }
  1. Task {
  2.     do {
  3.         let events = try await fetchTMEvents()
  4.         print("API results \(events)")
  5.     } catch {
  6.         print("API error \(error)")
  7.     }
  8. }

完整错误信息：

keyNotFound(CodingKeys(stringValue: "events", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: "events", intValue: nil) ("events").", underlyingError: nil))

英文:

This is the first time I have tried to use an API, I get the error "keyNotFound" Could someone point me in the right direction for understanding this better? Here is a link to their documentation: https://developer.ticketmaster.com/products-and-docs/apis/discovery-api/v2/#anchor_find

  1. let apiKey = "************"
  2.     
  3.     struct EventResponse : Decodable{
  4.         let events : [Event]
  5.     }
  6.     
  7.     struct Event : Decodable{
  8.         let id : String?
  9.     }
  10.     
  11.     func fetchTMEvents() async throws -> [Event]{
  12.         let urlTM = URL(string: "https://app.ticketmaster.com/discovery/v2/events.json?apikey=\(apiKey)")!
  13.         let(data, _) = try await URLSession.shared.data(from: urlTM)
  14.         let decoded = try JSONDecoder().decode(EventResponse.self, from: data)
  15.         return decoded.events
  16.     }
  1. Task {
  2.             do {
  3.                 let events = try await fetchTMEvents()
  4.                 print("API results \(events)")
  5.             } catch {
  6.                 print("API error \(error)")
  7.             }
  8.         }

Full error:

> keyNotFound(CodingKeys(stringValue: "events", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: "events", intValue: nil) ("events").", underlyingError: nil))

答案1

得分: 1

尝试使用这些测试模型来获取并解码events。
在SwiftUI中的示例代码显示了如何显示结果。

注意，您必须有一个有效的apiKey，否则响应将无法解码。

要获取完整的结构模型集，请将JSON数据（所有数据）复制到
https://app.quicktype.io/ ，大部分代码会为您生成。 调整
代码以满足您的需求。

您需要查阅文档以确定哪些结构/属性是可选的，
然后在它们后面添加?。

  1. struct ContentView: View {
  2.     @State var events: [Event] = []
  3.     
  4.     var body: some View {
  5.         List(events) { event in
  6.             Text(event.name)
  7.         }
  8.         .task {
  9.             do {
  10.                 if let results = try await fetchTMEvents() {
  11.                     events = results
  12.                 }
  13.             } catch {
  14.                 print("---> error: \(error)")
  15.             }
  16.         }
  17.     }
  18.     
  19.     func fetchTMEvents() async throws -> [Event]? {
  20.         let apiKey = "xxxxxxx"
  21.         let urlTM = URL(string: "https://app.ticketmaster.com/discovery/v2/events.json?apikey=\(apiKey)")!
  22.         let(data, _) = try await URLSession.shared.data(from: urlTM)
  23.         // print(String(data: data, encoding: .utf8))
  24.         let decoded = try JSONDecoder().decode(EventResponse.self, from: data)
  25.         return decoded.embedded.events
  26.     }
  27. }
  29. struct EventResponse: Codable {
  30.     let embedded: ResponseEmbedded
  31.     let page: Page
  33.     enum CodingKeys: String, CodingKey {
  34.         case page
  35.         case embedded = "_embedded"
  36.     }
  37. }
  39. struct ResponseEmbedded: Codable {
  40.     let events: [Event]?
  41. }
  43. struct Event: Codable, Identifiable {
  44.     let name, type, id, url, locale: String
  45. }
  47. struct Page: Codable {
  48.     let size, totalElements, totalPages, number: Int
  49. }

Hope this helps!

英文:

Try these test models to fetch then decode the events.
The example code in SwiftUI shows how to display the results.

Note, you must have a valid apiKey otherwise the response will not be decodable.

To get the full set of struct models, just copy the json data (all of it) to
https://app.quicktype.io/ and the bulk of the code is generated for you. Adjust that
code to suit your needs.

You will have to consult the docs to determine which struct/properties are optional,
then add ? to them.

  1. struct ContentView: View {
  2.     @State var events: [Event] = []
  3.     
  4.     var body: some View {
  5.         List(events) { event in
  6.             Text(event.name)
  7.         }
  8.         .task {
  9.             do {
  10.                 if let results = try await fetchTMEvents() {
  11.                     events = results
  12.                 }
  13.             } catch {
  14.                 print("---> error: \(error)")
  15.             }
  16.         }
  17.     }
  18.     
  19.     func fetchTMEvents() async throws -> [Event]? {
  20.         let apiKey = "xxxxxxx"
  21.         let urlTM = URL(string: "https://app.ticketmaster.com/discovery/v2/events.json?apikey=\(apiKey)")!
  22.         let(data, _) = try await URLSession.shared.data(from: urlTM)
  23.         // print(String(data: data, encoding: .utf8))
  24.         let decoded = try JSONDecoder().decode(EventResponse.self, from: data)
  25.         return decoded.embedded.events
  26.     }
  27. }
  29. struct EventResponse: Codable {
  30.     let embedded: ResponseEmbedded
  31.     let page: Page
  33.     enum CodingKeys: String, CodingKey {
  34.         case page
  35.         case embedded = "_embedded"
  36.     }
  37. }
  39. struct ResponseEmbedded: Codable {
  40.     let events: [Event]?
  41. }
  43. struct Event: Codable, Identifiable {
  44.     let name, type, id, url, locale: String
  45. }
  47. struct Page: Codable {
  48.     let size, totalElements, totalPages, number: Int
  49. }

huangapple
  • 本文由 发表于 2023年7月17日 09:04:07
  • 转载请务必保留本文链接：https://go.coder-hub.com/76700982.html
  • decodable
  • json
  • swift
  • ticketmaster
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