Problems with ForEach, SwiftUI

Question

Jad-T OP

Created Apr ’21

Replies 3

Boosts 0

Views 2.2k

Participants 2

Hello
I am getting a lot of errors in ForEach and I don't know why at all.
Here is the code:
The error is at line 12

Code Block 
import SwiftUI
import Combine
struct ContentView: View {
    
    @EnvironmentObject var networkController: NetworkControllerItalia
    
    var body: some View {
        Form{
            TextField("Input city name", text: $networkController.cityName)
            Section {
                ForEach(networkController.users.weather, id: \.self){ user in
                }
            }
        }
    }
}
class NetworkControllerItalia: ObservableObject {
    private var can: AnyCancellable?
    @Published var cityName: String = ""
    @Published var users = [UserItalia(weather: Weather())]
    
    init(cityName: String) {
        self.cityName = cityName
        
        let url = URL(string: "http://api.openweathermap.org/data/2.5/weather?q=\(cityName)&appid=")!
        
        self.can = URLSession.shared.dataTaskPublisher(for: url)
            .map { $0.data }
            .decode(type: [UserItalia].self, decoder: JSONDecoder())
            .eraseToAnyPublisher()
            .receive(on: DispatchQueue.main)
            .sink(receiveCompletion: {completion in
                print(completion)
            }, receiveValue: { users in
                self.users  = users
            })
    }
}
struct UserItalia: Decodable, Hashable{
    var weather: Weather
}
struct Weather: Decodable, Hashable {
    var main: String?
}

Thank you

Answered by Claude31 in 669883022

I would change code with:

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

and use user.weather later in the closure (you did not show what you do there, so hard to say more).

Boost

Answer 1

Jad-T OP

Apr ’21

Errors:
Cannot infer key path type from context; consider explicitly specifying a root type
Insert '<#Root#>'

Extra arguments at positions #2, #3 in call

Generic parameter 'Content' could not be inferred
Explicitly specify the generic arguments to fix this issue

Missing argument for parameter 'content' in call
Insert ', content: <#(Int) -> _#>'

Value of type '[UserItalia]' has no member 'weather

0

Answer 2

Claude31 OP

Apr ’21

Accepted Answer

I would change code with:

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

and use user.weather later in the closure (you did not show what you do there, so hard to say more).

0

Answer 3

Jad-T OP

Apr ’21

Actually this is not working:

ForEach(networkController.users, id: \.self){ user in

I thought it was right, that's why I checked it

0