create an array from JSON in swift - arrays

Question

I am trying to convert JSON data into an array but I do not really have any idea how to do it.
I get the data and save it in strings and I can also show it on display.
struct User_Hosting: Codable {
let company_name: String
let website: String
let street: String
let housenumber: String
let zip: String
let city: String
enum CodingKeys: String, CodingKey {
case company_name = "company_name"
case website = "website"
case street = "street"
case housenumber = "housenumber"
case zip = "zip"
case city = "city"
}
}
And here some other codes:
let url = URL(string: "myURL.com")
URLSession.shared.dataTask(with: url!, completionHandler: { [weak self] (data, response, error) in
guard let data = data, error == nil else {
print(error?.localizedDescription ?? "An error occurred")
return
}
DispatchQueue.main.async {
self?.dataSource = try! JSONDecoder().decode([User_Hosting].self, from: data)
}
}).resume()
}

Answer 1

Your CodingKeys match the property names, so you can get rid of the enum at all
struct UserHosting: Codable {
let companyName: String
let website: String
let street: String
let housenumber: String
let zip: String
let city: String
}
Since you have a some snake case keys in JSON, you can change the JSONDecoder.keyDecodingStrategy to convertFromSnakeCase, like so
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
Above decoder will treat keys such as company_name to be assigned to companyName property of your struct.
Finally you can decode your JSON in a do-catch block, so in case of an error we will have a message as to what went wrong.
do {
self.dataSource = try decoder.decode([UserHosting].self, from: data)
} catch {
print("JSON Decoding Error \(error)")
}