arrays - 延迟循环数组 - Swift

Question

我试图循环遍历一个数组，一次点亮一种颜色，一旦完成循环遍历每个项目，调用另一个函数来运行。到目前为止我有这个:

//Delay function from http://stackoverflow.com/questions/24034544/dispatch-after-gcd-in-swift/24318861#24318861
func delay(delay:Double, closure:()->()) {
    dispatch_after(
        dispatch_time(
            DISPATCH_TIME_NOW,
            Int64(delay * Double(NSEC_PER_SEC))
        ),
        dispatch_get_main_queue(), closure)
}

@IBAction func computerTurn(){
    if(isFirstLevel){levelLabel.text = ("Level 1"); isFirstLevel = false}
    else{ level++ }

    var gameOrderCopy = gameOrder
    var randomNumber = Int(arc4random_uniform(4))
    gameOrder.append(randomNumber)
    var i = 0

    for number in gameOrder{

        if number == 0{
            self.greenButton.highlighted = true
            self.delay(1){
                self.greenButton.highlighted = false
                }
        }

        else if number == 1{
            self.redButton.highlighted = true
            self.delay(1){
                self.redButton.highlighted = false
               }

        }

        else if number == 2{
            self.yellowButton.highlighted = true
            self.delay(1){
                self.yellowButton.highlighted = false
                }
        }
      else if number == 3{
        self.blueButton.highlighted = true
        self.delay(1){
            self.blueButton.highlighted = false
            }
        }
    }
}

但目前，它所做的只是延迟一秒钟，然后立即点亮所有颜色。我需要的是按顺序点亮颜色，每个颜色之间有第二个延迟。提前致谢!

Answer 1

不要执行delay 1，将vardelayTime = 1放在循环上方，并在循环中执行self.delay(delayTime++)