package mainimport (    "time"    "fmt")//ticker是一个定时触发的计时器，它会以一个间隔往channel发送整一个事件（当时时间），而channel的接收者可以以固定的时间间隔从channel中读取事件func main() {    ticker := time.NewTicker(time.Second)    i := 0    for true {        time := <-ticker.C        i++        fmt.Printf("i = %d, time = %v\n", i, time)        if i==5 {            ticker.Stop()            break        }    }}

执行的结果为

i = 1, time = 2018-09-20 09:22:38.9705836 +0800 CST m=+1.001708201i = 2, time = 2018-09-20 09:22:39.9702884 +0800 CST m=+2.001413001i = 3, time = 2018-09-20 09:22:40.9699923 +0800 CST m=+3.001116901i = 4, time = 2018-09-20 09:22:41.970699 +0800 CST m=+4.001823601i = 5, time = 2018-09-20 09:22:42.9704029 +0800 CST m=+5.001527501