Swift 3 Compiler Errors with JSON and Dictionaries within URLSession.shared.dataTask

Question

After previous issues with this particular app code as 'solved' with help, a new issue has arisen with this code:

var properties: [String] = []
var unsortedDetails: [String] = []
var contacts: [[String]] = []
var propertySorting: [(key: String, ind: String, link: Bool)] = []
var autolinks: [Bool] = []

and, in the viewDidLoad function:

let contactsRequest = URLRequest(url: URL(string: "https://script.google.com/macros/s/AKfycbxOLElujQcy1-ZUer1KgEvK16gkTLUqYftApjNCM_IRTL3HSuDk/exec?id=" + ID + "&sheet=" + Industry.replacingOccurrences(of: " ", with: "+", options: NSString.CompareOptions.literal, range: nil))!)

        let contactsTask = URLSession.shared.dataTask(with: contactsRequest as URLRequest)
        {(data, response, error) in
            do {
                let jsonResult: Dictionary = try JSONSerialization.jsonObject(with: data!, options: []) as! [String : Any]

                let results = jsonResult[self.Industry] as! [[String : Any]]

                for key in results[0].keys {
                    self.propertySorting.append(key: (key as? String)!, ind: results[0].value(forKey: key as! String) as! String, link: results[1].value(forKey: key as! String) as! String != "X")
                }
                self.propertySorting.sort(by: {Int($0.ind) < Int($1.ind)})

                for property in self.propertySorting {
                    self.properties.append(property.key)
                    self.autolinks.append(property.link)
                }

                for contact in results {
                    self.contacts.append([])
                    for key in self.properties {
                        self.contacts[self.contacts.count-1].append(contact.value(forKey: key) as! String)
                    }
                }

                DispatchQueue.main.async(execute: {
                    let listController = self.viewControllers[0] as! ListController

                    listController.properties = self.properties
                    listController.contacts = self.contacts
                    listController.autolinks = self.autolinks

                    listController.tableView.reloadData()
                })

            } catch {
                print("FATAL ERROR")
            }
        }

        contactsTask.resume()

The issues now encountered are: Extra argument 'ind' in call when propertySorting.append(...) is called, and if this (previously working) ind section is deleted, the same error is returned for link

Answer 1

Instead of NSArray and NSDictionary used Swift native Array and Dictionary and use keys with Dictionary to get array of all keys.

let jsonResult: Dictionary = try JSONSerialization.jsonObject(with: data!, options: []) as! [String : Any]
let results = jsonResult[self.Industry] as! [[String : Any]]

for key in results[0].keys {

}

Note: There is no need to use .mutableContainers option with Swift native type object.