How to fetch data from remote JSON in SwiftUI?

Question

Created Jan ’20

Replies 3

Boosts 0

Views 1.1k

Participants 4

so below is the part of the code (in SwiftUI) where local JSON file is used, I want to use remote JSON instead of local, could someone help?

Source is (https://developer.apple.com/tutorials/swiftui/building-lists-and-navigation)

so instead local landmarData.json I want to use https://lkakashv.github.io/landmarkData.json

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

{

let landmarkData: [Landmark] = load("landmarkData.json") 
 func load<T: Decodable>(_ filename: String) -> T 
{ let data: Data  guard let file = Bundle.main.url(forResource: filename, withExtension: nil) 
else { fatalError("Couldn't find \(filename) in main bundle.") }  
do { data = try Data(contentsOf: file) } 
catch { fatalError("Couldn't load \(filename) from main bundle:\n\(error)") }  
do { let decoder = JSONDecoder() return try decoder.decode(T.self, from: data) } 
catch { fatalError("Couldn't parse \(filename) as \(T.self):\n\(error)") } }

}

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Thank you

Boost

Answer 1

VascoB OP

Dec ’20

Hello, did you found out how to do it ? I have the same question. Thank you

0

Answer 2

OOPer OP

Dec ’20

I have the same question.

You should better start your own thread rather than adding a comment to an unanswered question.
Please do not forget to include your latest code and what you have tried till now, when starting your thread.

0

Answer 3

Jad-T OP

Dec ’20

Hello
I'll show you what I did

Code Block class NetworkControllerItalia: ObservableObject {
    private var can: AnyCancellable?
    
    let url = URL(string: "apple.com")!
    @Published var users = [UserItalia()]
    
    init() {
        self.can = URLSession.shared.dataTaskPublisher(for: url)
            .map { $0.data }
            .decode(type: [UserItalia].self, decoder: JSONDecode
            .eraseToAnyPublisher()
            .receive(on: DispatchQueue.main)
            .sink(receiveCompletion: {completion in
                print(completion)
            }, receiveValue: { users in
                self.users  = users
            })
    }
    
}
struct UserItalia: Decodable, Hashable {
}

In the struct you put the properties that you will fetch from your JSON, and instead of apple.com at line 4 you have to put the URL from where you are getting the data, then in the the ContentView you should use a ForEach like this:

Code Block @ObservedObject var networkController = NetworkControllerItalia()

Code Block ForEach(networkController.users, id: \.self){ user in
 		Text(user.nameOfProperty)
  }

Have a nice day

0