Golang time包的定时器/断续器

结构体类型time.Ticker表示了断续器的静态结构。
就是周期性的传达到期时间的装置。这种装置的行为方式与仅有秒针的钟表有些类似，只不过间隔时间可以不是1s。
初始化一个断续器

var ticker *timeTicker = time.NewTicker(time.Second)

示例一：使用时间控制停止ticke

package main

import (
    "fmt"
    "time"
)

func main(){
    //初始化断续器,间隔2s
    var ticker *time.Ticker = time.NewTicker(1 * time.Second)

    go func() {
        for t := range ticker.C {
            fmt.Println("Tick at", t)
        }
    }()

    time.Sleep(time.Second * 5)   //阻塞，则执行次数为sleep的休眠时间/ticker的时间
    ticker.Stop()     
    fmt.Println("Ticker stopped")
}

Tick at 2015-10-31 01:29:34.41859284 +0800 CST
Tick at 2015-10-31 01:29:35.420131668 +0800 CST
Tick at 2015-10-31 01:29:36.420565647 +0800 CST
Tick at 2015-10-31 01:29:37.421038416 +0800 CST
Tick at 2015-10-31 01:29:38.41944582 +0800 CST
Ticker stopped

示例二：使用channel控制停止ticker

package main

import (
    "fmt"
    "time"
)

func main(){
    //初始化断续器,间隔2s
    var ticker *time.Ticker = time.NewTicker(100 * time.Millisecond)

    //num为指定的执行次数
    num := 2
    c := make(chan int, num) 
    go func() {
        for t := range ticker.C {
            c <- 1
            fmt.Println("Tick at", t)
        }
    }()

    time.Sleep(time.Millisecond * 1500)
    ticker.Stop()     
    fmt.Println("Ticker stopped")
}