How to add levels to Flappybird like game? - ios

Question

This might be bit confusing.
This is my override function ATM, where my walls are spawning every 2 seconds.
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
if gameStarted == false{
gameStarted = true
mexican.physicsBody?.affectedByGravity = true
let spawn = SKAction.run({
() in
self.createWalls()
})
let delay = SKAction.wait(forDuration: 2.0)
let spawnDelay = SKAction.sequence([delay, spawn])
let spawnDelayForever = SKAction.repeatForever(spawnDelay)
self.run(spawnDelayForever)
let distance = CGFloat(self.frame.width + wallPair.frame.width)
let movePipes = SKAction.moveBy(x: -distance - 50, y: 0, duration: TimeInterval( 0.01 * distance))
let removePipes = SKAction.removeFromParent()
moveAndRemove = SKAction.sequence([movePipes,removePipes])
mexican.physicsBody?.velocity = CGVector(dx: 0, dy: 0)
mexican.physicsBody?.applyImpulse(CGVector(dx: 0, dy: 65))
I have found a tutorial where the wall spawn duration is made faster but I am unsure how to incorporate this into my code as they have used a new function.
My walls are being spawned in the override function which makes it hard for me to call this when adding my if statement.
func startNewLevel(){
levelNumber += 1
if self.actionForKey("spawningEnemies") != nil{
self.removeActionForKey("spawningEnemies")
}
var levelDuration = timeInterval()
switch levelNumber {
case 1: levelDuration = 2.0
case 2: levelDuration = 1.8
case 3: levelDuration = 1.6
default: levelDuration = 0.5
print("Cannot find level into")
}
let spawn = SKAction.run(spawnEnemy)
let waitToSpawn = SKAction.waitForDuration(levelDuration)
let spawnSequence = SKAction.sequence([waitToSpawn, spawn])
let spawnForever = SKAction.repeatActionForever(spawnSequence)
self.runAction(spawnForever, withKey: "spawningEnemies")
This is where I would be calling the function startNewLevel() but my wall spawning is set up in override func touchedBegan.
func didBegin(_ contact: SKPhysicsContact) {
let firstBody = contact.bodyA
let secondBody = contact.bodyB
if firstBody.categoryBitMask == physicsCategory.bird && secondBody.categoryBitMask == physicsCategory.wall{
score += 1
scoreLabel.text = "\(score)"
firstBody.node?.removeFromParent()
if score == 10 || score == 15 || score == 20{
startNewLevel()
if score > UserDefaults().integer(forKey: "HIGHSCORE") {
saveHighScore()
}
}
else if firstBody.categoryBitMask == physicsCategory.bird && secondBody.categoryBitMask == physicsCategory.wall{
score += 1
scoreLabel.text = "\(score)"
secondBody.node?.removeFromParent()
if score > UserDefaults().integer(forKey: "HIGHSCORE") {
saveHighScore()
}
}
This is probably really confusing but if anyone gets me HOLA you will be my favourite person on the earth.