斯威夫特倒数计时器逻辑 [英] Swift countDown timer Logic

问题描述

我创建按天，小时和第二倒计时器。我目前正在将其储​​存在一个String数组，同时将其转换为一个int（使用地图（）），这样我可以倒计时/递减，当我做的值成标签。

I'm creating a countdown timer by the day, hour and second. I'm currently storing them in a String array while also converting them into an Int ( using map() ) so that I can countdown/decrement when I make the values into a label.

打印到日志时，电流输出为： [[68168]，[68188]，[68243]，[68281]]

The current output when printing to the logs is: ["[68168]", "[68188]", "[68243]", "[68281]"]

我无法形成倒计时功能的逻辑，这样当打秒0的1分钟停机，并在1小时减59分钟后等等，直到它击中00:00:00 。

I'm having trouble forming the logic of a countDown function so that when seconds hits "0", 1 minute goes down, and after 59 minutes 1 hour is decremented, etc., until it hits "00:00:00".

在每个索引，我的3个值[小时，分，秒。但是，我有几个指标。

In each index, I have the 3 values of [Hour, Minute, Second]. But I have several indexes.

目前我正在服用小时* 3600，分钟* 60 +第二。我的问题是我怎么能这样划分和分解的倒计时功能...

Currently I'm taking the Hour * 3600, the minute * 60 + the second. My question is how I can divide this up and break it down in the countDown function...

下面是我的code：

   //Here I'm querying and converting the objects into Hour, Minute, Seconds.

 var createdAt = object.createdAt
            if createdAt != nil {

                let calendar = NSCalendar.currentCalendar()
                let comps = calendar.components([.Hour, .Minute, .Second], fromDate: createdAt as NSDate!)
                let hour = comps.hour * 3600
                let minute = comps.minute * 60
                let seconds = comps.second
                let intArray = [hour, minute, seconds]

                //Now i'm appending to the String array below. 

                self.timeCreatedString.append("\(intArray)")

               var timer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: Selector("countDown"), userInfo: nil, repeats: true)


            }


             func countDown() {

                     //completely stuck as to how to decrement/divide up the values so that I can display it as: 23:49:01 (Hours, minutes, seconds). 

                 }

我怎么可以形成它，这样单独每个索引倒计时中的每个元素？例如：23：59：59

How can I form it so that each element within each index countdowns separately? ex: "23: 59: 59"

PS，这是正在兴建一个的 TableViewController。的我想打印这一个标签，是一个的细胞的视图控制器中的的cellForRowAtIndexPath 法

PS, this is being built on a TableViewController. I want to print this to a label that is in a cell View Controller in the cellForRowAtIndexPath method

推荐答案

请在几秒钟内你的倒计时时间称为单变量倒计时：

Keep your countdown time in seconds in a single variable called countdown:

var countdown = 7202 // two hours and two seconds

当谈到时间来显示它，它分解成小时，分和秒，并使用字符串（格式：）构造进行格式化：

When it comes time to display it, break it into hours, minutes, and seconds and use the String(format:) constructor to format it:

// loop 5 times to demo output    
for _ in 1...5 {
    let hours = countdown / 3600
    let minsec = countdown % 3600
    let minutes = minsec / 60
    let seconds = minsec % 60
    print(String(format: "%02d:%02d:%02d", hours, minutes, seconds))
    countdown--
}

输出：

02:00:02
02:00:01
02:00:00
01:59:59
01:59:58

---

如果您有多个计时器，让他们在一个数组：

---

If you have more than one timer, keep them in an array:

// Array holding 5 different countdown timers referred to as
// timers[0], timers[1], timers[2], timers[3] and timers[4]
var timers = [59, 61, 1000, 3661, 12345]

for i in 0 ..< times.count {
    let hours = timers[i] / 3600
    let minsec = timers[i] % 3600
    let minutes = minsec / 60
    let seconds = minsec % 60
    print(String(format: "%02d:%02d:%02d", hours, minutes, seconds))
}

输出：

00:00:59
00:01:01
00:16:40
01:01:01
03:25:45

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