如何在swift中添加时间延迟 [英] How to add a time delay in swift

问题描述

我正在用swift编写一个互动游戏，我需要知道如何在重复动作之间添加一个暂停。我必须这样做的方式是for循环。如下：

I am writing an interactive game in swift, and I need to know how to add a pause in between repetitive actions. The way I have to do this is in a for loop. As follows:

for i in 1...10 {
    println("Hello!")
}

任何人都可以找到修改此代码的方法，以便每秒打印一个Hello ？

Can anyone find a way to modify this code so that it prints one "Hello" per second?

此外，如果循环的swift 立即返回，我认为延迟代码不会起作用那么，这里是另一个使用函数的迭代解决方案，如果for循环没有这个函数应该有效。

Also, if swift for loops are instantly returning, i don't think that delay code would work in there, so here is another iterative solution using functions that should work if the for loop doesn't.

func printer() {
    println("Hello")
    delay()
}

func delay() {
    //delay code goes here
    printer()
}

任何帮助都将不胜感激。

Any help would be greatly appreciated.

谢谢。

推荐答案

试试这个

for i in 1...10{
    var timeToDelay = Double(i)
    delay(timeToDelay) {
        println("Hello")
    }
}

func delay(delay:Double, closure:()->()) {
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW,Int64(delay * Double(NSEC_PER_SEC))),dispatch_get_main_queue(), closure)
}

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