Swift4.2 parse json for use in pickerview - json

Question

I'm trying to populate a UIPickerView using the response from an API, I can successfully do this with basic JSON responses but I am really struggling with the example below where the JSON returns a value as an array.
The code below is from a Playground and has been simplified to only show the relevant code, I am confident that if I can create a variable with the array in the correct format then I can use it to populate the UIPickerView but I've included the UIPickerView code in case I am going about this the wrong way.
I have searched for and tried to adapt various examples from both this forum and others but for some reason, I just can't get it to work, I am new to Swift so I'm on a learning curve!
The closest I have got is account(data: ["account1", "account2", "account3"]) but I need to get ["account1", "account2", "account3"]
I hope someone can help and hopefully not downvote the question.
import UIKit
let json = """
{
"returnResult":1,
"data":["account1", "account2", "account3"]
}
"""
struct account: Codable {
var data: [String]
}
let accounts: account = try JSONDecoder().decode(account.self, from:json.data(using: .utf8)!)
print(accounts)
/*
RESULT RETURNED
account(data: ["account1", "account2", "account3"])
RESULT REQUIRED
["account1", "account2", "account3"]
PICKERVIEW CODE FROM WORKING VIEW
// picker view methods
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return accs.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> account? {
return accs[row]
}
// delegate method
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
let selectedDriver = accs[row]
displayLbl.text = selectedDriver
}
*/

Answer 1

I finally got it sorted using the following code as the basis for the solution
import UIKit
struct Account: Codable {
var data: [String]
}
class ViewController: UIViewController {
// MARK: - IBOutlets
#IBOutlet private var displayLabel: UILabel!
#IBOutlet private var pickerView: UIPickerView!
// MARK: - Internal Variables'
var account: Account?
// MARK: - IBActions
#IBAction private func showPicker(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
pickerView.isHidden = !sender.isSelected
}
private func createAccountList() {
let json = """
{
"returnResult":1,
"data":["account1", "account2", "account3","account4", "account5", "account6"]
}
"""
do {
account = try JSONDecoder().decode(Account.self, from: json.data(using: .utf8)!)
} catch {
print(error.localizedDescription)
}
}
private func initUI() {
pickerView.delegate = self
pickerView.dataSource = self
}
override func viewDidLoad() {
super.viewDidLoad()
createAccountList()
initUI()
pickerView.reloadAllComponents()
// Do any additional setup after loading the view, typically from a nib.
}
}
extension ViewController: UIPickerViewDataSource, UIPickerViewDelegate {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return account?.data.count ?? 0
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return account?.data[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
displayLabel.text = account?.data[row]
}
}
The project can be found on Github https://github.com/techmehra/uipicker-demo
I did have to amend the code slightly to make it work with the live API response.