How to Display Json Response using get method

Question

Here is my Response and I want to print the response using array I want to take some details in the response like "Id" and "available" and "leaves" and I have to show in a label in my VC

{
"id": 1,
"emp_id": "001",
"termination_date": "active",
"blood_group": "A+",
"rating": 0,
"noOfStars": 0,
"starOfMonth": false,
"gender": "Female",
"expertise": "",
"experience": "",
"leaves": 0,
"available": 5,
"compoff": 0,
"earnedLeaves": null,
"wfh": 0

}

my code is

struct jsonstruct8:Decodable  {

var available: String
var leaves: String

}

var arrdata = [jsonstruct8]()


func getdata(){
    let url = URL(string: "MY URL")
    URLSession.shared.dataTask(with: url!) { (data, response, error )in
        do{if error == nil{

            self.arrdata = try JSONDecoder().decode([jsonstruct8].self, from: data!)

            for mainarr in self.arrdata{
            print(mainarr.available,":",mainarr.leaves)
            print(data)
            }
            }

        }catch{
            print("Error in get json data")
        }

        }.resume()
}

I am getting "Error in get json data"

The JSON you've added is not an array. Add the whole valid JSON here. — PGDev
– PGDev, Commented Jun 27, 2019 at 5:43
"I am getting "Error in get json data", that's because you have hard coded that error message. Do print(error) instead so that you get the real error printend — Joakim Danielson
– Joakim Danielson, Commented Jun 27, 2019 at 6:01
This is the error I am getting. typeMismatch(Swift.Array<Any>, Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Array<Any> but found a dictionary instead.", underlyingError: nil)) — vamsi
– vamsi, Commented Jun 27, 2019 at 6:04

PGDev · Accepted Answer · 2019-06-27 07:49:05Z

1

Sample JSON:

  {
    "id": 1,
    "emp_id": "001",
    "termination_date": "active",
    "blood_group": "A+",
    "rating": 0,
    "noOfStars": 0,
    "starOfMonth": false,
    "gender": "Female",
    "expertise": "",
    "experience": "",
    "leaves": 0,
    "available": 5,
    "compoff": 0,
    "earnedLeaves": null,
    "wfh": 0
  }

Model:

struct Employee: Codable {
    let id: Int
    let empId: String
    let terminationDate: String
    let available: Int
    let leaves: Int
    //add other properties as well....
}

Parsing:

if let data = data {
    if let data = data {
        do {
            let decoder = JSONDecoder()
            decoder.keyDecodingStrategy = .convertFromSnakeCase
            var employee = try JSONDecoder().decode(Employee.self, from: data)
            print("\(employee.available) : \(employee.leaves)") //here you can modify then employee details...
        } catch  {
            print(error)
        }
    }
}

Edit:

Always update the UI on main thread.

DispatchQueue.main.async {
    self.totalLeaves.text = "\(employee.leaves)"
}

edited Jun 27, 2019 at 7:49

answered Jun 27, 2019 at 5:49

PGDev

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8 Comments

vamsi Over a year ago

I am getting this compile error . Value of type 'JSONDecoder' has no member 'keyDecodingStrategy'

vamsi Over a year ago

my response is starting with an object not with an array sorry I forgot to mention

PGDev Over a year ago

Updated the answer for object instead of array.

vamsi Over a year ago

I am trying your code but getting this compile error "Value of type 'JSONDecoder' has no member 'keyDecodingStrategy' " for this line code decoder.keyDecodingStrategy = .convertFromSnakeCase. I am using swift 4 Xcode 9.2

vamsi Over a year ago

yes I figured that and help me how to assign that parameters (Int )value to UILabel I am unable to assign it

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