Parsing the JSON Data in Swift 2 - ios

Question

I am parsing the data and I am getting the responseString also.But my problem is I want to convert it into dictionary and then I want to get the values from that jsonObject.
But I am unable to get that.
My Code is as follows
func loginRequest(url:String, withParams params: [String: String?], postCompleted : (succeeded: Bool, msg: String) -> ()){
let request = NSMutableURLRequest(URL: NSURL(string: url)!)
let session = NSURLSession.sharedSession()
request.HTTPMethod = "POST"
var err: NSError?
var bodyData = ""
for (key,value) in params{
if (value == nil){ continue }
let scapedKey = key.stringByAddingPercentEncodingWithAllowedCharacters(
.URLHostAllowedCharacterSet())!
let scapedValue = value!.stringByAddingPercentEncodingWithAllowedCharacters(
.URLHostAllowedCharacterSet())!
bodyData += "\(scapedKey)=\(scapedValue)&"
}
request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
let task = session.dataTaskWithRequest(request,
completionHandler: {data, response, error -> Void in
let dataString = NSString(data: data!, encoding: NSUTF8StringEncoding)
postCompleted(succeeded: true, msg: dataString! as String)
print(dataString!)
if let datas = dataString!.dataUsingEncoding(NSUTF8StringEncoding) {
do{
let json = try NSJSONSerialization.JSONObjectWithData(datas, options: []) as? [String:AnyObject]
//return json
print(json)
}
catch
{
print("Something went wrong")
}
}
})
task.resume()
}
I am calling that method like this
self.loginRequest("http://stream.gsr-india.com:8080/pgn_service/REST/WebService/GetUserDetails",
withParams: ["first_name":firstNameTextField.text,"last_name":lastNameTextField.text , "application_id":uniqueIdTextField.text])
{
(succeeded: Bool, msg: String) -> () in
if(succeeded) {
if msg == "0"
{
//Incorrect data...
}
else
{
//The login it's ok...
}
}
}
Can anyone Please help me to resolve that.
Thanks In Advance.

Answer 1

Change method declaration to
func loginRequest(url:String, withParams params: [String: String?], postCompleted : (succeeded: Bool, msg: NSDictionary?) -> ()){
then change the task handler to
let task = session.dataTaskWithRequest(request,
completionHandler: {data, response, error -> Void in
let dataString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print(dataString!)
do{
let json = try NSJSONSerialization.JSONObjectWithData(datas, options: []) as? [String:AnyObject]
postCompleted(succeeded: true, msg: json)
print(json)
}
catch {
print("Something went wrong")
}
}
})
change the callback to
(succeeded: Bool, msgDict: NSDictionary?) -> () in
if let dict = msgDict {
// call any value like dict["error"] etc
}