getting PickerData data from a Rest WebService - arrays

Question

i get data from a web service and my pickerData Array don't save values when i want to use it outside of the Json Parsing bloc.
here's my code
var pickerData: [String] = [String]()
var mag : String!
override func viewDidLoad() {
super.viewDidLoad()
NomMAG.alpha = 0
// \(detectionString)
let str = "http://vps43623.ovh.net/yamoinscher/api/getAllMag"
let url = NSURL(string: str)!
let task = NSURLSession.sharedSession().dataTaskWithURL(url) { (data, response, error) -> Void in
if let urlContent = data {
do {
let jsonObject = try NSJSONSerialization.JSONObjectWithData(urlContent, options: [])
if let jsonResult = jsonObject as? [String:AnyObject] {
if let Pick = jsonResult["magasin"] as? [[String:String]] {
for categorie in Pick {
self.mag = categorie["libelle"]!
self.pickerData.append(magasin)
//self.pickerData = [(self.produits[0].magasin)]
}
print(self.pickerData)
dispatch_async(dispatch_get_main_queue()) {
self.picker1.reloadInputViews()
// print(self.produits.count)
}
}
}
} catch {
print("JSON serialization failed", error)
}
} else if let connectionError = error {
print("connection error", connectionError)
}
}
task.resume()
//print(produits.count)
//pickerData = ["Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "autre"]
//print(self.pickerData)
self.picker1.delegate = self
self.picker1.dataSource = self
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// The number of columns of data
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
// The number of rows of data
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return self.pickerData.count
}
// The data to return for the row and component (column) that's being passed in
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return self.pickerData[row]
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if pickerData[row] == "autre"
{
//print(row)
NomMAG.alpha = 1
}
else
{
//print(row.description)
NomMAG.alpha = 0
}
}
I want to get my PickerView full with the data i gained from the JsonParsing and the PickerData Array is null outside the block of code of the Json

Answer 1

Connect delegate and dataSource of the picker view in Interface Builder and replace viewDidLoad with
var pickerData = [String]()
override func viewDidLoad() {
super.viewDidLoad()
let str = "http://vps43623.ovh.net/yamoinscher/api/getAllMag"
let url = NSURL(string: str)!
let task = NSURLSession.sharedSession().dataTaskWithURL(url) { (data, response, error) -> Void in
if let urlContent = data {
do {
let jsonObject = try NSJSONSerialization.JSONObjectWithData(urlContent, options: [])
if let jsonResult = jsonObject as? [String:AnyObject],
magasin = jsonResult["magasin"] as? [[String:String]] {
// filter valid items, map them to an array and filter empty strings
self.pickerData = magasin.filter { $0["libelle"] != nil }.map { $0["libelle"]! }.filter { !$0.isEmpty}
}
dispatch_async(dispatch_get_main_queue()) {
self.picker1.reloadAllComponents()
}
} catch {
print("JSON serialization failed", error)
}
} else if let connectionError = error {
print("connection error", connectionError)
}
}
task.resume()
}
You have to add the NomMAG line