How to get my score counter working in a SpriteKit game - sprite-kit

Question

I am using SpriteKit and Xcode to make a game and the counter is 'counting' but it only updates at the end of the game when you start a new one.
func adjustScore(by points: Int) {
score += points
}
func projectileDidCollideWithMonster(projectile: SKSpriteNode, monster: SKSpriteNode) {
print("Hit")
projectile.removeFromParent()
monster.removeFromParent()
monstersDestroyed += 1
adjustScore(by: 100)
if monstersDestroyed > 30 {
let reveal = SKTransition.flipHorizontal(withDuration: 0.5)
let gameOverScene = GameOverScene(size: self.size, won: true)
view?.presentScene(gameOverScene, transition: reveal)
}
Where have I gone wrong?
answer solved but heres what is after my View Did Load:
override func didMove(to view: SKView) {
background.zPosition = -1
background.position = CGPoint(x: frame.size.width / 2, y: frame.size.height / 2)
addChild(background)
scoreLabel = SKLabelNode(fontNamed: "Chalkduster")
scoreLabel.text = "Points = \(score)"
scoreLabel.fontSize = 20
scoreLabel.fontColor = SKColor.black
scoreLabel.position = CGPoint(x: size.width/6.2, y: size.height/1.2)
addChild(scoreLabel)
HighScoreLabel = SKLabelNode(fontNamed: "Chalkduster")
HighScoreLabel.text = "High score = \(highScore)"
HighScoreLabel.fontSize = 20
HighScoreLabel.fontColor = SKColor.black
HighScoreLabel.position = CGPoint(x: size.width/5.2, y: size.height/6)
addChild(HighScoreLabel)
NewSkinLabel = SKLabelNode(fontNamed: "Chalkduster")
NewSkinLabel.text = ""
NewSkinLabel.fontSize = 20
NewSkinLabel.fontColor = SKColor.black
NewSkinLabel.position = CGPoint(x: size.width/2, y: size.height/4.4)
addChild(NewSkinLabel)
}

Answer 1

You have two problems. First, you never access scoreLabel outside of didMove so the score label never changes. You have to write code to update the score label, as Alexandru demonstrated in his answer.
Your second problem is that you have two scoreLabel variables, a global var and a local scoreLabel let constant in the didMove function. When you declare scoreLabel in didMove,
let scoreLabel = SKLabelNode(fontNamed: "Chalkduster")
scoreLabel.text = "Total Coins: \(score)"
scoreLabel.fontSize = 40
scoreLabel.fontColor = SKColor.black
scoreLabel.position = CGPoint(x: size.width/2, y: size.height/1.5)
addChild(scoreLabel)
This version of scoreLabel goes away when you exit didMove. Now if you access the global scoreLabel to display the score, the label is empty. You loaded and set everything on the temporary local version.
The easiest way to fix this issue and avoid confusion is to have only one scoreLabel variable. Get rid of the global scoreLabel and declare scoreLabel as a property of the GameScene class. Then in didMove, remove the let to load scoreLabel.
scoreLabel = SKLabelNode(fontNamed: "Chalkduster")
Now the value of scoreLabel will stay around when the scene finishes loading. If you update scoreLabel in adjustScore, the score should update.
One more thing. If you have a response about things not working, you need to provide more information than "I tried this and it didn't work." That is not a helpful response. You have to describe what didn't work or else there will be a lot of back and forth trying to get the relevant information, increasing the time it takes for you to get the solution.

Answer 2

When the projectile hits a monster, you update the score, but you don't update the label. In this case, the label will always be equal to the initial value that you set at the start of your game
When you increment the score, you should also update the score_label.
func adjustScore(by points: Int)
{
score += points
score_label.text = "Points = \(score)"
}