How can I make a function execute every second in swift?

Question

I want to add a score to the top of my scene in the game I am working on. The score is going to based on how long you last, and will increase every second. Thanks for the he

Answer 1

I don't think you need NSTimer for this.

Since you are using SpriteKit, I am going to suggest simplest solution in my opinion:

Declare a variable var prevScoreCalcTime:TimeInterval = 0

Inside of update func in your GameScene set it up like below:

override func update(_ currentTime: TimeInterval) {
    if currentTime - prevScoreCalcTime > 1 {
        prevScoreCalcTime = currentTime
        // Any function you put here will execute every second
    }
}

Good luck!