Post request always wrapped by optional text - php

Question

I have a very similar problem like in Why the http post request body always wrapped by Optional text in the Swift app
but I can´t apply the solution from this thread to my code, because I don´t have a request.setValue.
Does anyone know what I need to do to get rid of the Optional?
My Code:
#IBAction func LoginButtonTapped(sender: UIButton) {
let username = UsernameTextField.text
let password = PasswordTextField.text
if(username!.isEmpty || password!.isEmpty) {return; }
let request = NSMutableURLRequest (URL: NSURL(string: "http://myip/loginregister.php")!)
request.HTTPMethod = "POST"
let postString = "username=\(username)&password=\(password)"
request.HTTPBody = postString.dataUsingEncoding(NSUTF8StringEncoding)
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) { data, response, error in
guard error == nil && data != nil else {
// check for fundamental networking error
print("error=\(error)")
return
}
let data = postString.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)!
do {
if let json = try NSJSONSerialization.JSONObjectWithData(data, options: []) as? NSDictionary {
let success = json["success"] as? Int // Okay, the `json` is here, let's get the value for 'success' out of it
print("Success: \(success)")
} else {
let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding) // No error thrown, but not NSDictionary
print("Error could not parse JSON: \(jsonStr)")
}
} catch let parseError {
print(parseError) // Log the error thrown by `JSONObjectWithData`
let jsonStr = NSString(data: data, encoding: NSUTF8StringEncoding)
print("Error could not parse JSON: '\(jsonStr)'")
}
}
task.resume()

Answer 1

You must unwrapping the value when get text from UITextField first, because the text property of UITextField allow nil
let username = UsernameTextField.text!
let password = PasswordTextField.text!
Explain more
When you unwrap the text of the UITextField, the username and password will be not nil variable.
The code compare empty should be:
if(username.isEmpty || password.isEmpty) {return }
If you does not unwrap, when you use this "\(username)", your are try to convert a nilable object to string, so the string result will be appended with a "Optional" text.
To Solve problem with Content-Type for request
Paste this line to your code. I don't believe that you do not have setValue method.
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField:"Content-Type")