how to use codable and decodable for the following json? - ios

Question

I have a following sample json file I want to do it with modal classes but am not sure how to do this in code.
{
"countryCodes": [{
"country_code": "AF",
"country_name": "Afghanistan",
"dialling_code": "+93"
},
{
"country_code": "AL",
"country_name": "Albania",
"dialling_code": "+355"
},
{
"country_code": "DZ",
"country_name": "Algeria",
"dialling_code": "+213"
},
{
"country_code": "AS",
"country_name": "American Samoa",
"dialling_code": "+1"
}
]
}
My modal class is as follows
import Foundation
class CountryModal : NSObject, NSCoding{
var countryCodes : [CountryCode]!
/**
* Instantiate the instance using the passed dictionary values to set the properties values
*/
init(fromDictionary dictionary: [String:Any]){
countryCodes = [CountryCode]()
if let countryCodesArray = dictionary["countryCodes"] as? [[String:Any]]{
for dic in countryCodesArray{
let value = CountryCode(fromDictionary: dic)
countryCodes.append(value)
}
}
}
/**
* Returns all the available property values in the form of [String:Any] object where the key is the approperiate json key and the value is the value of the corresponding property
*/
func toDictionary() -> [String:Any]
{
var dictionary = [String:Any]()
if countryCodes != nil{
var dictionaryElements = [[String:Any]]()
for countryCodesElement in countryCodes {
dictionaryElements.append(countryCodesElement.toDictionary())
}
dictionary["countryCodes"] = dictionaryElements
}
return dictionary
}
/**
* NSCoding required initializer.
* Fills the data from the passed decoder
*/
#objc required init(coder aDecoder: NSCoder)
{
countryCodes = aDecoder.decodeObject(forKey: "countryCodes") as? [CountryCode]
}
/**
* NSCoding required method.
* Encodes mode properties into the decoder
*/
#objc func encode(with aCoder: NSCoder)
{
if countryCodes != nil{
aCoder.encode(countryCodes, forKey: "countryCodes")
}
}
}
and
import Foundation
class CountryCode : NSObject, NSCoding{
var countryCode : String!
var countryName : String!
var diallingCode : String!
/**
* Instantiate the instance using the passed dictionary values to set the properties values
*/
init(fromDictionary dictionary: [String:Any]){
countryCode = dictionary["country_code"] as? String
countryName = dictionary["country_name"] as? String
diallingCode = dictionary["dialling_code"] as? String
}
/**
* Returns all the available property values in the form of [String:Any] object where the key is the approperiate json key and the value is the value of the corresponding property
*/
func toDictionary() -> [String:Any]
{
var dictionary = [String:Any]()
if countryCode != nil{
dictionary["country_code"] = countryCode
}
if countryName != nil{
dictionary["country_name"] = countryName
}
if diallingCode != nil{
dictionary["dialling_code"] = diallingCode
}
return dictionary
}
/**
* NSCoding required initializer.
* Fills the data from the passed decoder
*/
#objc required init(coder aDecoder: NSCoder)
{
countryCode = aDecoder.decodeObject(forKey: "country_code") as? String
countryName = aDecoder.decodeObject(forKey: "country_name") as? String
diallingCode = aDecoder.decodeObject(forKey: "dialling_code") as? String
}
/**
* NSCoding required method.
* Encodes mode properties into the decoder
*/
#objc func encode(with aCoder: NSCoder)
{
if countryCode != nil{
aCoder.encode(countryCode, forKey: "country_code")
}
if countryName != nil{
aCoder.encode(countryName, forKey: "country_name")
}
if diallingCode != nil{
aCoder.encode(diallingCode, forKey: "dialling_code")
}
}
}
How do I use these models to get the value of to say India +91 code? I am new to swift so I am clueless as to how to use these models.
the method I know is simple method of ditionary
fileprivate func loadNames(Country: String ) {
// //var countryCodes : [CountryCode]!
// var dict = [Coordinator]?.self
if let filePath = Bundle.main.path(forResource: "CountryCode", ofType: "json") {
if let jsonData = NSData(contentsOfFile: filePath) {
do {
// countryCodes = try? JSONDecoder().decode(CountryCode.self, from: jsonData as Data)
var countryCodes = try JSONSerialization.jsonObject(with: jsonData as Data, options: []) as? [String: Any]
// let countryCodes = try? JSONDecoder().decode(Welcome.self, from: jsonData as Data)
print ("country d ",countryCodes!)
let countryArray = countryCodes!["countryCodes"] as? NSArray
if countryArray!.count > 0
{
for countryElement in countryArray!
{
let dict = countryElement as! NSDictionary
if (dict["country_code"] as! String).description == countryCodeLocale
{
print("found ",(dict["dialling_code"] as! String ).description)
country_codeText.text = (dict["dialling_code"] as! String ).description
phone_NumberText.text = "99133131602"
return
}
}
}
} catch {
print(error.localizedDescription)
}
}
}
}
func fetchValues()
{
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Testing")
request.returnsObjectsAsFaults = false
do
{
let result = try context.fetch(request)
for data in result as! [NSManagedObject]
{
self.nameArr.append(data.value(forKey: "name") as! String)
self.lastNameArr.append(data.value(forKey: "lastname") as! String)
}
self.tableView.reloadData()
} catch {
print("Failed")
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return self.nameArr.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as? testTVCell
cell?.nameLbl.text = self.nameArr[indexPath.row]
cell?.lastNameLbl.text = self.lastNameArr[indexPath.row]
cell?.deleteBtn.tag = indexPath.row
return cell!
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
return UITableView.automaticDimension
}
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
#IBAction func deleteAction(_ sender: UIButton) {
// self.nameArr.remove(at: sender.tag)
// self.lastNameArr.remove(at: sender.tag)
// self.tableView.reloadData()
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Testing")
fetchRequest.returnsObjectsAsFaults = false
let index = sender.tag
do
{
if let result = try? context.fetch(fetchRequest)
{
for object in result as! [NSManagedObject]
{
print(object.value(forKey: "name") as! String)
if ((object).value(forKey: "name") as! String).description == nameArr[index]
{
print(object.value(forKey: "name") as! String)
context.delete(object )
self.lastNameArr.remove(at: index)
self.nameArr.remove(at: index)
DispatchQueue.main.async
{
self.tableView.reloadData()
}
break
}
}
}
}
catch
{
print("error")
}
let _ : NSError! = nil
do {
try context.save()
self.tableView.reloadData()
} catch {
print("error : \(error)")
}
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
print("Deleted")
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Testing")
fetchRequest.returnsObjectsAsFaults = false
let index = indexPath.row
do
{
if let result = try? context.fetch(fetchRequest)
{
for object in result as! [NSManagedObject]
{
print(object.value(forKey: "name") as! String)
if ((object).value(forKey: "name") as! String).description == nameArr[index]
{
print(object.value(forKey: "name") as! String)
context.delete(object )
DispatchQueue.main.async
{
}
}
}
}
}
catch
{
print("error")
}
let _ : NSError! = nil
do {
try context.save()
} catch {
print("error : \(error)")
}
self.lastNameArr.remove(at: index)
self.nameArr.remove(at: index)
self.tableView.deleteRows(at: [indexPath], with: .automatic)
}
#IBAction func submitTapped(_ sender: Any)
{
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Testing", in: context)
let newUser = NSManagedObject(entity: entity!, insertInto: context)
newUser.setValue(self.nameTxt.text, forKey: "name")
newUser.setValue(self.lastNameTxt.text, forKey: "lastname")
do
{
try context.save()
}
catch
{
print("Failed saving")
}
}
func apiCall()
{
let urlString = "https://example.org"
let url = NSURL(string: urlString)
let request = NSMutableURLRequest(url: url! as URL)
activityView.startAnimating()
self.view.addSubview(activityView)
request.httpMethod = "GET"
let task = URLSession.shared.dataTask(with: request as URLRequest) { data,response,error in
if error != nil
{
DispatchQueue.main.async
{
let alert = UIAlertController(title: "Network Connection Lost", message: "Please try again", preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .cancel, handler: { Void in
self.activityView.stopAnimating()
})
alert.addAction(ok)
self.present(alert, animated: true, completion: nil)
}
return
}
do
{
let result = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as AnyObject
print(" JSON : ", result)
let a = result as! NSArray
let b = a[0] as! NSDictionary
print("name ", (b["Name"] as! String).description)
var nameArray = [String]()
for element in a
{
nameArray.append(((element as! NSDictionary)["Name"] as! String).description)
}
print("nameArray ", nameArray)
DispatchQueue.main.async
{
self.activityView.stopAnimating()
self.activityView.isHidden = true
}
}
catch
{
print("Error -> \(error)")
DispatchQueue.main.async
{
self.activityView.stopAnimating()
let alert = UIAlertController(title: "Alert?", message: error as? String,preferredStyle: .alert)
let ok = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alert.addAction(ok)
self.present(alert, animated: true, completion: nil)
return
}
}
}
task.resume()
}
}
let indexpath = NSIndexPath(row: sender.tag, section: 0)
let cell = tableView.cellForRow(at: indexpath as IndexPath) as? testTVCell
if (self.tableView.isEditing) {
cell?.deleteBtn.setTitle("Edit", for: .normal)
self.tableView.setEditing(false, animated: true)
} else {
cell?.deleteBtn.setTitle("Done", for: .normal)
self.tableView.setEditing(true, animated: true)
}
{
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let urlString = appDelegate.serverUrl + "queryClassifiedList"
let url = NSURL(string: urlString)
let request = NSMutableURLRequest(url: url! as URL)
let spinner = JHSpinnerView.showDeterminiteSpinnerOnView(self.view)
spinner.progress = 0.0
self.view.addSubview(spinner)
request.httpMethod = "POST"
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.setValue("application/json; charset=utf-8", forHTTPHeaderField: "Accept")
var dict : [AnyHashable: Any] = [
"channel" : appDelegate.channel,
"device" : appDelegate.deviceId,
"classifiedtype" : self.classifiedType,
"startnum" : startNum,
"endnum" : endNum
]
if UserDefaults.standard.value(forKey: "categoryClassifiedFilter") as? Int != nil && UserDefaults.standard.value(forKey: "categoryClassifiedFilter") as? Int != -1
{
let categoryRow = (UserDefaults.standard.value(forKey: "categoryClassifiedFilter") as? Int)!
dict["categoryid"] = categoryRow
}
if UserDefaults.standard.value(forKey: "cityRowFilter") as? Int != nil && UserDefaults.standard.value(forKey: "cityRowFilter") as? Int != -1
{
let cityId = (UserDefaults.standard.value(forKey: "cityRowFilter") as? Int)!
dict["city"] = cityId
}
let jsonData: Data? = try? JSONSerialization.data(withJSONObject: dict, options: [])
request.httpBody = jsonData
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let urlString = appDelegate.serverUrl + "queryClassifiedList"
let url = NSURL(string: urlString)
let request = NSMutableURLRequest(url: url! as URL)
let spinner = JHSpinnerView.showDeterminiteSpinnerOnView(self.view)
spinner.progress = 0.0
self.view.addSubview(spinner)
request.httpMethod = "POST"
var bodyData : String!
bodyData = "channel=" + appDelegate.channel + "&device=" + appDelegate.deviceId + "&Classifiedtype=" + self.classifiedType.description + "&Startnum=" + startNum.description + "&Endnum=" + endNum.description
if UserDefaults.standard.value(forKey: "categoryClassifiedFilter") as? Int != nil && UserDefaults.standard.value(forKey: "categoryClassifiedFilter") as? Int != -1
{
let categoryRow = (UserDefaults.standard.value(forKey: "categoryClassifiedFilter") as? Int)!
bodyData = bodyData + "&Categoryid=" + categoryRow.description
}
if UserDefaults.standard.value(forKey: "cityRowFilter") as? Int != nil && UserDefaults.standard.value(forKey: "cityRowFilter") as? Int != -1
{
let cityId = (UserDefaults.standard.value(forKey: "cityRowFilter") as? Int)!
bodyData = bodyData + "&city=" + cityId.description
}
print("bodyData : ", bodyData)
request.httpBody = bodyData.data(using: String.Encoding.utf8)
}
but I want modal class method implementation. Can someone help?

Answer 1

You can try
struct Root: Codable {
let countryCodes: [CountryCode]
}
struct CountryCode: Codable {
let countryCode, countryName, diallingCode: String
enum CodingKeys: String, CodingKey {
case countryCode = "country_code"
case countryName = "country_name"
case diallingCode = "dialling_code"
}
}
let res = try? JSONDecoder().decode(Root.self,from:jsonData)
print(res.countryCodes)
res.countryCodes.forEach {
if $0.countryCode == "DZ" {
print($0.diallingCode)
}
}