show keyboard on SKNode touch - ios

Question

I am trying to do a registration scene inside a game on iOS. what I have so far is this:
Since I couldn't manage to put UITextField inside the Scene that I have, I tried to put SKNodes that activate the keyboard on touch. It would be very useful if someone could help me to put UITextFields inside my game scene (because it would be easier to get a registration scene, and with less code, and also with native support for this).
My code so far is this:
let nameForm:SKSpriteNode = SKSpriteNode(imageNamed: "RegistrationScene_TEST_textviews")
let usernameForm:SKSpriteNode = SKSpriteNode(imageNamed: "RegistrationScene_TEST_textviews")
let passwordForm:SKSpriteNode = SKSpriteNode(imageNamed: "RegistrationScene_TEST_textviews")
let passwordForm2:SKSpriteNode = SKSpriteNode(imageNamed: "RegistrationScene_TEST_textviews")
And when someone touch any of these nodes it should be managed with a method like this:
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let touch = touches.anyObject()! as UITouch
let location = touch.locationInView(self.view)
for touch:AnyObject in touches{
if CGRectContainsPoint(nameForm.frame, touch.locationInNode(self)){
//Function to display the keyboard
//Function that saves the keystroke
//Function to display a nameLabel with the saved keystroke
}
//same for the other Forms
//methods for the buttons (DONE)
}
}
If there is any other way to achieve a text input into the game (to save game statistics or something useful for the gameplay) please let me know, any help would be very appreciated
EDIT:
According to Cristian Woerz, i made the following and this solved my problem.
let txtField:UITextField!
txtField = UITextField(frame: CGRect(x: 0, y: 0, width: 200, height: 30));
self.view?.addSubview(txtField!)

Answer 1

Normally, you shouldn't use UIKit-elements in a SpriteKit-game. But For this problem, you can use a UITextfield and add it to your view:
var txtField: UITextField = UITextField(frame: CGRect(x: 0, y: 0, width: 200, height: 30));
self.view.addSubview(txtField)
You could also make your UITextField semi transparent by setting the background-color alpha value to less then the default 1:
txtField.backgroundColor = UIColor(red: 125/255, green: 125/250, blue: 125/250, alpha: 0.5)