JSON Parsing error with Swift - ios

Question

I'm new in iOS programming and I'm trying with the new language Swift.
I've a problem / I don't know how in parsing JSON with Swift for iOS use. I already used JSON in Android, so I know that the JSON and the link is right, but when I try the code below (seen in a tutorial) the app seems to crash and highlighted this line:
var jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as NSDictionary
The console gives me back this error:
The operation couldn’t be completed. (NSURLErrorDomain error -1005.) fatal error: unexpectedly found nil while unwrapping an Optional value
Here is the entire code of the button's action:
let urlAsString = "http://xxxxxxxxxx.altervista.org/App/_DD_/downloadutenti.php?email="+campoEmail.text+"&password="+campoPassword.text
let url = NSURL(string: urlAsString)!
let urlSession = NSURLSession.sharedSession()
println(url)
println(urlSession)
let jsonQuery = urlSession.dataTaskWithURL(url, completionHandler: { data, response, error -> Void in
if (error != nil) {
println(error.localizedDescription)
}
var err: NSError?
if(data != nil){
var jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as NSDictionary
if (err != nil) {
println("JSON Error \(err!.localizedDescription)")
}
var jsonEmail = ""
if var jsonEmail: String! = jsonResult["email"] as? NSString{
}
else{
println("PROBLEM 1")
}
var jsonPassword = ""
if var jsonPassword: String! = jsonResult["pass"] as? NSString{
}
else{
println("PROBLEM 2")
}
dispatch_async(dispatch_get_main_queue(), {
self.scritta2.text = "Email: " + jsonEmail + " - Password: " + jsonPassword
})
}
})
jsonQuery.resume()
N.B.
I use xcode6 simulator and I know for sure that the "variables" campoEmail.text and campoPassword.text are taken in a good way.
JSON it should give back:
[{"id":"1","email":"lincoln#gmail.com","password":"pass","permessi":"1","stato":"Italia","citta":"Palermo","via":"Via Lincoln, 29","cap":"90100","telefono":"091xxxxxx"}]
EDIT FOR #Neo HELP:
I edited all the action of the button like this, but the code goes to the data's null check..
let curURL: NSURL = NSURL(string: "http://fantacharleston.altervista.org/App/_DD_/downloadutenti.php?email=lincoln#gmail.com&password=pass")!
let curRequest: NSURLRequest = NSURLRequest(URL: curURL, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 60)
NSURLConnection.sendAsynchronousRequest(curRequest, queue: NSOperationQueue.mainQueue()) { (response: NSURLResponse!, data: NSData?, error: NSError!) -> Void in
if (data != nil) {
if let jsonArray: NSArray = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSArray? {
let jsonObject: NSDictionary? = jsonArray.objectAtIndex(0) as? NSDictionary
if (jsonObject != nil) {
NSLog("object: %#", jsonObject!)
let email: NSString? = jsonObject?.objectForKey("email") as? NSString
let password: NSString? = jsonObject?.objectForKey("password") as? NSString
if (email != nil && password != nil) {
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.scritta2.text = "Email: " + email! + " - Password: " + password!
})
}
}
}
}
else{
println("null")
}
}

Answer 1

Yes I think I know where your Problem is... Your are trying to put a JSONArray into a NSDictionary... That cant go... Its like trying to put it into a JSONObject in Java.
Just exchange the NSDictionary with NSArray and be sure to get properties like array[0]["key"], not like array["key"], because you are working with an array, not with a dictionary... (Its like ArrayList, and HashMap in Java)
Try this please...
if let jsonResult: NSArray = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as NSArray? {
let jsonEmail: NSString? = jsonResult.objectAtIndex(0).objectForKey("email")
}
Edit with Code you need
Here it is... I wrote it a bit like I would write it in Java for Android... I think you will easily get it... The problem you commented maybe was that there is no "pass" tag in your JSON... its "password"...
let curURL: NSURL = NSURL(string: "http://fantacharleston.altervista.org/App/_DD_/downloadutenti.php?email=lincoln#gmail.com&password=pass")!
let curRequest: NSURLRequest = NSURLRequest(URL: curURL, cachePolicy: NSURLRequestCachePolicy.ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 60)
NSURLConnection.sendAsynchronousRequest(curRequest, queue: NSOperationQueue.mainQueue()) { (response: NSURLResponse!, data: NSData?, error: NSError!) -> Void in
if (data != nil) {
if let jsonArray: NSArray = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSArray? {
let jsonObject: NSDictionary? = jsonArray.objectAtIndex(0) as? NSDictionary
if (jsonObject != nil) {
NSLog("object: %#", jsonObject!)
let email: NSString? = jsonObject?.objectForKey("email") as? NSString
let password: NSString? = jsonObject?.objectForKey("password") as? NSString
if (email != nil && password != nil) {
dispatch_async(dispatch_get_main_queue(), { () -> Void in
self.scritta2.text = "Email: " + email + " - Password: " + password
})
}
}
}
}
}