lable.text - Fatal Error - ios

Question

I have 2 classes.
In first class I have a label and a button and in second class I have JsonPars function
I need to write a data from second class to the label in first class.
Here is my code:
import UIKit
import CoreLocation
//main class
class ViewController: UIViewController{
#IBOutlet weak var labl: UILabel!
#IBAction func btn(sender: AnyObject) {
Json().Pars()
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
and second class:
import Foundation
//Json-class
class Json {
func Pars() {
let url = NSURL(string: "http://my.url.com")
let task = NSURLSession.sharedSession().dataTaskWithURL(url!, completionHandler: {data, response, error -> Void in
if (error != nil){
println(error.localizedDescription)
}
var err: NSError?
let parseObj: AnyObject? = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments, error: &err)
if let json = parseObj as? NSDictionary{
if let response = json["response"] as? NSDictionary{
if let obj = response["Object"] as? NSDictionary{
if let data = obj["data"] as? NSString {
println(data)//work's and i have a data
ViewController().labl.text = data //fatal error: unexpectedly found nil while unwrapping an Optional value
}
}
}
}
})
task.resume()
}
}
Sorry fo my English

Answer 1

The problem is you're creating a new instance of ViewController when you call ViewController(). Since you haven't presented the view controller it's outlets haven't been set and are nil. Therefore when you try to access labl (an implicitly unwrapped optional), it's equal to nil and your app crashes.
To fix this, perhaps pars() (it's convention to use lower case for methods) could return the data, which you would then have access to in your ViewController class.

Answer 2

Sorry I'm in class on my Lenovo so I can't test this, but try:
import Foundation
import UIKit
I normally do that just in case I need it at some point. Also if that fails maybe try sending data to the viewcontroller then applying it to label.text.
EDIT: You also have this:
})
above task.resume, please review that and see if that doesn't fix it.