如何打印一些数据值？ [迅速]

Question

I am using URLSession right now. I want to print only the profile value among the userId and profile in the data value here. How can I print it?

Some of my code

if let httpResponse = response as? HTTPURLResponse {
      print( httpResponse.allHeaderFields )
                                          
      guard let data = data else {return}
      print( String (data: data, encoding: .utf8) ?? "" )
                
      let profile = "{\"profile\":\"\(data.profile ?? "")}" // ERROR [Value of type 'Data' has no member 'profile']
                
      }

print (String (data: data, encoding: .utf8) ??"") <When I run this code, I get the result like this. userId and profile I want to display only the profile excluding the userId. Thanks for reading.

Answer 1

I'd define a type conforming to the Codable protocol and use a JSONDecoder to decode your data to something user friendly.

struct UserData: Codable {
    let userId: String
    let profile: String
}

Here's how to decode your data:

if let httpResponse = response as? HTTPURLResponse {

    guard let data = data else { return }

    let decoder = JSONDecoder()
    do {
        let userData = try decoder.decode(UserData.self, from: data)
        print(userData.profile)
    } catch {
        print("Error: \(error)")
    }
}

Answer 2

You can convert data to json and use however you want

json = try JSON(data: data) 

if you want to parse it easily use SwiftyJson