Convert Json Object to Array format in Swift 4

Question

I have the json

{
  "message": null,
  "data": {
    "Commodity Department": {
      "total": 2,
      "completed": 1,
      "completedWithDue": 0,
      "completedWithOutDue": 1,
      "inProgress": 1,
      "inProgressWithDue": 0,
      "inProgressWithOutDue": 1,
      "statusCounter": null
    }
}

I need to convert the each department json object to array. Currently each category value ("total": 0, "completed": 0, "completedWithDue": 0, "completedWithOutDue": 0, "inProgress": 0, "inProgressWithDue": 0, "inProgressWithOutDue": 0,) will be in object format. I need to convert in array and load to collectionview based on category. As of now I am trying to decode my json in the below code

public struct Dashboard: Decodable {
    public let data : [String:Departments]
}

public struct Departments: Decodable {
    public let total, completed, completedWithDue, completedWithOutDue: Int
    public let inProgress, inProgressWithDue, inProgressWithOutDue: Int
}

let dashboard = try? JSONDecoder().decode(Dashboard.self, from: response.data!)

print(dashboard!.data.keys)

@vadian currently each category value ("total": 0, "completed": 0, "completedWithDue": 0, "completedWithOutDue": 0, "inProgress": 0, "inProgressWithDue": 0, "inProgressWithOutDue": 0,) will be in object format. i need to convert array load to collectionview based on category — Ben10
– Ben10, Commented Dec 20, 2019 at 12:36
For readability, please add code to your question instead of in the comments. Also, what is the output of print(dashboard!.data.keys) ? — koen
– koen, Commented Dec 20, 2019 at 12:41
Does this answer your question? How to parse Array of JSON to array in Swift — koen
– koen, Commented Dec 20, 2019 at 12:43
@koen I get the deparment names All Departments,Portfolio Mangement Service..... — Ben10
– Ben10, Commented Dec 20, 2019 at 12:44

Joakim Danielson · Accepted Answer · 2019-12-20 14:25:53Z

0

You can create an array of the values by adding a computed property to your struct

public struct Departments: Decodable {
    public let total, completed, completedWithDue, completedWithOutDue: Int
    public let inProgress, inProgressWithDue, inProgressWithOutDue: Int

    var categoryValues: [Int] {get {
        return [total, completed, completedWithDue, completedWithOutDue,
         inProgress, inProgressWithDue, inProgressWithOutDue]
        }
    }
}

or create the array on the fly using map

dashboard?.data.mapValues{[$0.total, $0.completed, $0.completedWithDue, ...]}

edited Dec 20, 2019 at 14:25

answered Dec 20, 2019 at 13:53

Joakim Danielson

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4 Comments

Ben10 Over a year ago

I got a error Missing return in a function expected to return '[Int]'

Joakim Danielson Over a year ago

Sorry, it's a new feature in Swift 5.

Ben10 Over a year ago

How to access the keys

Joakim Danielson Over a year ago

There are no keys in an array but the values are always in the same order. If you want keys you need a dictionary, the solution is basically the same

Zain · Accepted Answer · 2019-12-20 13:03:15Z

You can decode json without knowing keys like this:

func printJSON(json: [String:Any]) {
let jsonKeys = json.keys //Gets the list of keys on the outer-most layer of the JSON
for i in 0..<jsonKeys.count {
    let level1 = json[jsonKeys.index(jsonKeys.startIndex, offsetBy: i)] //retrieves the object with the specific keys
    if let level2 = json[level1.key] as? [String:Any]{ //if the key is another object
        printJSON(json: level2) //send it as a new json object to the function again
    } else if let level2 = json[level1.key] as? [[String:Any]] { //if the key is an array of objects
        for i in 0..<level2.count { //loop through the array
            printJSON(json: level2[i]) //send each array element to the function
        }
    } else if let value = json[level1.key] as? String { //if value of String/Integer/Bool type
        print(value) //then only print values of the specified type (String-type in this case)
    }
}

}

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