class Network {
func getingData(completion : @escaping ([Model]) -> ()) async {
guard let url = URL(string: "https://jsonplaceholder.typicode.com/posts") else { return }
do {
let (data, _) = try await URLSession.shared.data(from: url)
if let posts = try? JSONDecoder().decode([Model].self, from: data) {
completion(posts)
}
}
catch {
print("error")
}
}
}
0
आप की कोशिश कर सकता है कुछ इस तरह का दृष्टिकोण है, जहां getData के साथ काम करता है Decodable, के रूप में उल्लेख किया गया था पिछले जवाब.
इस विशेष उदाहरण में से एक सरणी Decodable.
struct Post: Decodable, Identifiable {
let userId: Int
let id: Int
let title: String
let body: String
var comments: [Comment]?
}
struct Comment: Decodable, Identifiable {
let postId: Int
let id: Int
let name: String
let email: String
let body: String
}
struct ContentView: View {
let client = Network()
@State var posts: [Post] = []
var body: some View {
List {
ForEach(posts, id: \.id) { post in
Text(post.title)
}
}
.task {
posts = await client.getData(from: "https://jsonplaceholder.typicode.com/posts")
// all comments from the first post
let comments: [Comment] = await client.getData(from: "https://jsonplaceholder.typicode.com/posts/\(posts[0].id)/comments")
print("\n---> comments: \(comments)")
}
}
}
class Network {
func getData<T: Decodable>(from urlString: String) async -> [T] {
guard let url = URL(string: urlString) else {
print(URLError(.badURL))
return [] // <-- todo, deal with errors
}
do {
let (data, response) = try await URLSession.shared.data(for: URLRequest(url: url))
guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
print(URLError(.badServerResponse))
return [] // <-- todo, deal with errors
}
let results = try JSONDecoder().decode([T].self, from: data)
return results
}
catch {
return [] // <-- todo, deal with errors
}
}
}