如何重置NSTimer？SWIFT代码

Question

因此,我正在创建一个应用程序/游戏,您可以在计时器用完之前点击与图片对应的按钮,然后输掉.你得到1秒钟点击按钮,如果你选择了正确的按钮,那么计时器将重置并出现一张新照片.我无法重置计时器.一旦我试图重置它,它会在一秒后触发.这是代码:

loadPicture()运行viewDidLoad()

func loadPicture() {
    //check if repeat picture
    secondInt = randomInt
    randomInt = Int(arc4random_uniform(24))
    if secondInt != randomInt {
        pictureName = String(self.PicList[randomInt])
        image = UIImage(named: pictureName)
        self.picture.image = image
        timer.invalidate()
        resetTimer()

    }
    else{
        loadPicture()
    }
}

这是resetTimer()方法:

func resetTimer(){
        timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("gameOverTimer"), userInfo: nil, repeats: false)

}

我认为它可能与NSRunloops有关？我不确定.我甚至不知道NSRunloop是多么诚实.

Answer 1

所以我终于明白了......

我必须通过初始化来创建一个单独的函数来启动计时器.在resetTimer()函数中,我添加了timer.invalidate()行.所以我的代码看起来像这样:

func loadPicture() {
    //check if repeat picture
    secondInt = randomInt
    randomInt = Int(arc4random_uniform(24))
    if secondInt != randomInt {
        pictureName = String(self.PicList[randomInt])
        image = UIImage(named: pictureName)
        self.picture.image = image
        resetTimer()

    }
    else{
        loadPicture()
    }
}
func startTimer(){
    timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("gameOverTimer"), userInfo: "timer", repeats: true)
}

func resetTimer(){

    timer.invalidate()
    startTimer()
}

编辑

使用新的选择器语法,它看起来像这样:

func startTimer(){
    timer = NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: #selector(NameOfClass.startTimer), userInfo: "timer", repeats: true)
}