如何使用swift为我的iOS游戏添加每秒计数的分数？

I want to display a score at near the top of the scene. Scoring is dependent on the amount of seconds you have lasted and whenever I have tried to implement using NSTimer, the number remains at 0. Thanks in advance!

我想在场景顶部附近显示一个分数。评分取决于您持续的秒数,每当我尝试使用NSTimer实施时,数字保持为0.提前感谢!

2 个解决方案

#1

You don't really need an NSTimer. Since you are using SpriteKit, you can use SKAction for this. Here's an example:

你真的不需要NSTimer。由于您使用的是SpriteKit,因此您可以使用SKAction。这是一个例子:

let increaseScoreAction = SKAction.runBlock { score++ }
let waitAction = SKAction.waitForDuration(1)
let groupAction = SKAction.group([increaseScoreAction, waitAction])
let repeatAction = SKAction.repeatActionForever(groupAction)

runAction(repeatAction)

#2

So, very simplistically this is what I tried and it works fine. I am storing the timer as an instance variable to invalidate it later if necessary.

所以,非常简单,这是我尝试过的,它工作正常。我将计时器存储为实例变量,以便稍后在必要时使其无效。

class ViewController: UIViewController {

    var score: Int = 0
    var timer: NSTimer?

    override func viewDidLoad() {
        super.viewDidLoad()

         timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("incrementTimer"), userInfo: nil, repeats: true)        
    }

    func incrementTimer() {
        score++
        println(score)
    }
}

#1