如何在 Spritekit 中创建计时器? [英] How to create a timer in Spritekit?

问题描述

我已经找到了如何在单视图应用程序中创建计时器的方法，但没有找到 Spritekit.当我使用以下代码时，出现 2 个错误(如下所列).谁能帮我解决这个问题?谢谢，杰克.

Ive figured out how to make a timer in a single-view application, but not Spritekit. When I use the following code, I get 2 errors(listed below). Can anyone help me out with this? Thanks, Jack.

计时器.

if(!_scorelabel) {
    _scorelabel = [SKLabelNode labelNodeWithFontNamed:@"Courier-Bold"];

    _scorelabel.fontSize = 200;
    _scorelabel.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame));
    _scorelabel.fontColor = [SKColor colorWithHue: 0 saturation: 0 brightness: 1 alpha: .5];
    [self addChild:_scorelabel];
}
_scorelabel = [NSTimer scheduledTimerWithTimeInterval: 1 target:self selector:@selector(Timercount)userInfo: nil repeats: YES];

错误

Incompatible pointer types assigned to 'SKLabelNode*' from 'NSTimer*'
Undeclared selector 'Timercount'

推荐答案

在 Swift 中可用:

In Swift usable:

在 Sprite Kit 中不要使用 NSTimer、GCD 或 performSelector:afterDelay: 因为这些计时方法会忽略节点、场景或视图的暂停状态.此外，您不知道它们是在游戏循环中的哪个点执行的，这可能会导致各种问题，具体取决于您的代码实际执行的操作.

In Sprite Kit do not use NSTimer, GCD or performSelector:afterDelay: because these timing methods ignore a node's, scene's or the view's paused state. Moreover you do not know at which point in the game loop they are executed which can cause a variety of issues depending on what your code actually does.

var actionwait = SKAction.waitForDuration(0.5)
        var timesecond = Int()
        var actionrun = SKAction.runBlock({
                timescore++
                timesecond++
                if timesecond == 60 {timesecond = 0}
                scoreLabel.text = "Score Time: \(timescore/60):\(timesecond)"
            })

        scoreLabel.runAction(SKAction.repeatActionForever(SKAction.sequence([actionwait,actionrun])))

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