Xcode func used in another View Controller - mysql

Question

I have this func in a Swift file, and it returns the value of the data in the database and prints it out in the counsel.
I want to use the value in the other View Controller but I can't get this to work, so I hope somebody can help me.
It is the nameUser, statusUser and pointUser I like to use in other View Controller.
import Foundation
import UIKit
var code = "100"
var getStatusUSer = ""
class getJSON: NSObject, URLSessionDataDelegate
{
//properties
var data : NSMutableData = NSMutableData()
func downloadItems()
{
let url = NSMutableURLRequest(url: NSURL(string: "http://www.hholm.dk/time_app/qrcode4.php")! as URL)
url.httpMethod = "POST"
let postString = "username=\(code)"
url.httpBody = postString.data(using: String.Encoding.utf8)
print(url.httpBody = postString.data(using: String.Encoding.utf8))
var session: URLSession!
let configuration = URLSessionConfiguration.default
session = URLSession(configuration: configuration, delegate: self, delegateQueue: nil)
let task = session.dataTask(with: url as URLRequest)
task.resume()
}
func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data)
{
self.data.append(data as Data);
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?)
{
if error != nil
{
print("Not Found", error)
}
else
{
print("Ok")
self.parseJSON()
}
}
func parseJSON()
{
var jsonResult: NSArray = NSArray()
do
{
jsonResult = try JSONSerialization.jsonObject(with: self.data as Data, options:JSONSerialization.ReadingOptions.allowFragments) as! NSArray
print("jsonResult.count",jsonResult.count)
}
catch let error as NSError
{
print("jsonResult: ", error)
}
var jsonElement: NSDictionary = NSDictionary()
var contador = 0
for i in (0..<jsonResult.count)
{
jsonElement = jsonResult[i] as! NSDictionary
if let nameUser = jsonElement["name"] as? String,
let pointUser = jsonElement["point"] as? String,
let statusUser = jsonElement["status"] as? String
{
getStatusUSer = statusUser
print("Name: ", nameUser)
print("Status: ", statusUser)
print("Point: ", pointUser)
}
}
}
}
Hi Woof this is what i have in my viewcontroler:
import UIKit
class inputcodeViewController: UIViewController {
#IBOutlet weak var input: UITextField!
#IBAction func but(_ sender: Any) {
downloadItems()
}
func downloadItems(){
let getJson = GetJSON()
//setting the delegate
getJson.delegate = self
//starting download
getJson.downloadItems()
}
}
extension inputcodeViewController: GetJSONDelegate {
func didReceiveValues(name: String, status: String, point: String){
//now you can use values in your view controller
}
}
how can i print the values

Answer 1

You can use protocol to return those values:
import Foundation
import UIKit
var code = "100"
var getStatusUSer = ""
//define the protocol
protocol GetJSONDelegate {
func didReceiveValues(name: String, status: String, point: String)
}
//I've changed the first char of the class name to uppercase
class GetJSON: NSObject, URLSessionDataDelegate{
//properties
var data : NSMutableData = NSMutableData()
//delegate
var delegate: GetJSONDelegate?
func downloadItems(){
let url = NSMutableURLRequest(url: NSURL(string: "http://www.hholm.dk/time_app/qrcode4.php")! as URL)
url.httpMethod = "POST"
let postString = "username=\(code)"
url.httpBody = postString.data(using: String.Encoding.utf8)
print(url.httpBody = postString.data(using: String.Encoding.utf8))
var session: URLSession!
let configuration = URLSessionConfiguration.default
session = URLSession(configuration: configuration, delegate: self, delegateQueue: nil)
let task = session.dataTask(with: url as URLRequest)
task.resume()
}
func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data)
{
self.data.append(data as Data);
}
func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?)
{
if error != nil
{
print("Not Found", error)
}
else
{
print("Ok")
self.parseJSON()
}
}
func parseJSON()
{
var jsonResult: NSArray = NSArray()
do
{
jsonResult = try JSONSerialization.jsonObject(with: self.data as Data, options:JSONSerialization.ReadingOptions.allowFragments) as! NSArray
print("jsonResult.count",jsonResult.count)
}
catch let error as NSError
{
print("jsonResult: ", error)
}
var jsonElement: NSDictionary = NSDictionary()
var contador = 0
for i in (0..<jsonResult.count)
{
jsonElement = jsonResult[i] as! NSDictionary
if let nameUser = jsonElement["name"] as? String,
let pointUser = jsonElement["point"] as? String,
let statusUser = jsonElement["status"] as? String
{
getStatusUSer = statusUser
print("Name: ", nameUser)
print("Status: ", statusUser)
print("Point: ", pointUser)
//here we will return received data to the delegate
self.delegate?.didReceiveValues(name: nameUser, status: statusUser, point: pointUser)
}
}
}
}
Now we need to set your controller as a delegate for that protocol:
//this is an example, you need to add the methods described in your controller where you want to use those values
class YourViewController: UIViewController{
// the method that is called by you to get values
func downloadItems(){
let getJson = GetJSON()
//setting the delegate
getJson.delegate = self
//starting download
getJson.downloadItems()
}
}
//defining protocol methods in the extension of the view controller
extension YourViewController: GetJSONDelegate {
func didReceiveValues(name: String, status: String, point: String){
//now you can use values in your view controller
}
}