How can I get a call to aUIView.presentScene(aSKScene, transition: aSKTransition) to act in unison with aUIView.addSubview(aUITextField!)? - ios

Question

How can I get a call to aUIView.presentScene(aSKScene, transition: aSKTransition) to act in unison with aUIView.addSubview.
Without the transition, there is zero problem .. with the SKTransition the UITextField happens 1st and then the SKTransition – not in unision.
Like, the UITextField is planted in the view of the ViewController and sits around waiting for the SKTransition to catch up
Code
func showScene(theSceneName: String) {
if let ourScene = SKScene(fileNamed: theSceneName) {
addTextFieldToVC(toSceneName: theSceneName)
// NB: theSceneName is passed by Reference so we can
// return here before we call presentScene(...)
addGamePiecesToScene(toScene: theSceneName)
if let theView = self.view as! SKView? {
theView.ignoresSiblingOrder = true
theView.showsFPS = true
theView.showsNodeCount = true
// Finally, present the scene
let theTransition = SKTransition.doorway(withDuration: 2.0)
theView.presentScene(ourScene, transition: theTransition)
}
} // if let ourScene
} // showScene
func addTextFieldToVC(toSceneName: String) {
if (toSceneName == "GameScene") {
if let theView = self.view as! SKView? {
aUITextField = UITextField(frame:CGRectMake(x: aXValue, y: aYValue))
theView.addSubview(aUITextField!)
}
}
}
func addGamePiecesToScene(toScene: SKScene) {
myRoom = SKSpriteNode(texture: SKTexture(imageNamed: roomImg))
myRoom!.zPosition = roomZposition
// etc with .size, .position
toScene.addChild(myRoom!)
}
As the above shows, I add the UITextField 1st and add the SKSpriteNode images 2nd.
Yet they are not in sync with the SKTransition. They appear in sync just without the SKTransition.
FWIW, I have tried this sequence within showScene, but no changes:
theView.presentScene(theSceneName, transition: theTransition)
DispatchQueue.main.async {
addTextFieldToVC(toSceneName: theSceneName)
}
I have also started to experiment with Completion Handlers:
override func viewDidLoad() {
super.viewDidLoad()
setupScene()
// Completion Handler for showScene()
showModifiedScene {
if thisSceneName == "GameScene" { // a global var
addTextFieldToVC(toSceneName: thisSceneName!)
}
}
} // viewDidLoad
// modified for callback option??
func showScene(theSceneName: String) {
if let ourScene = SKScene(fileNamed: theSceneName) {
addGamePiecesToScene(toScene: ourScene)
showModifiedScene()
} // if let ourScene
} // showScene
func showModifiedScene(completionBlock: () -> Void) {
if thisSceneName == "GameScene" { // a global var
if let ourScene = SKScene(fileNamed: thisSceneName!) {
if let theView = self.view as! SKView? {
theView.ignoresSiblingOrder = true
theView.showsFPS = true
theView.showsNodeCount = true
let theTransition = SKTransition.doorway(withDuration: 2.0)
theView.presentScene(ourScene, transition: theTransition)
}
}
completionBlock()
}
} // showModifiedScene
Again, without the transition, there is zero problem .. with the SKTransition the UITextField happens 1st and then the SKTransition – not in unision.
I am still chugging with this .. but I figure it’s time to call for a few reinforcements! I'll still work away while I am waiting for the calvary.

Answer 1

Try adding the text view, then wrapping the call to presentScene() in a call to DispatchQueue.main.async().
That way the text field will be added to your view before you begin presenting that view.