Go使用ticker

当我们想按固定的时间间隔进行一些工作时, 会使用“ Go Tickers”。可以使用Stop()方法像停止计时器一样停止ticker。
NewTicker()方法返回一个新的Ticker, 该Ticker具有一个根据duration参数发送时间的通道。持续时间必须大于零, 否则, 置顶器将出现panic。
【Go使用ticker】Tick()是NewTicker的包装, 它提供对滴答通道的访问。 Tick()方法对于不想关闭ticker指示器的客户很有用。
Go ticker示例

package main import "time" import "fmt" func main() { tickerValue := time.NewTicker(time.Millisecond * 100) go func() { for t := range tickerValue.C { fmt.Println("Tick at", t) } }() time.Sleep(time.Millisecond * 500) tickerValue.Stop() fmt.Println("Ticker stopped") }

输出:
Tick at 2017-10-07 17:26:35.946279716 +0530 IST m=+0.101345812 Tick at 2017-10-07 17:26:36.046371811 +0530 IST m=+0.201437907 Tick at 2017-10-07 17:26:36.146417657 +0530 IST m=+0.301483753 Tick at 2017-10-07 17:26:36.24851386 +0530 IST m=+0.403579956 Tick at 2017-10-07 17:26:36.346476978 +0530 IST m=+0.501543074 Ticker stopped

Go代码示例2
package main import ( "log" "time" ) func haveFun(s string) { log.Printf("\tA: Let's have fun: %v", s) } func doPolling() { for _ = range time.Tick(2 * time.Second) { haveFun("\t B : Okay!") } } func main() { go doPolling() select {} //The select statement lets a goroutine wait on multiple communication operations. }

输出:
2017/10/07 18:15:15A: Let's have fun:B : Okay! 2017/10/07 18:15:17A: Let's have fun:B : Okay! 2017/10/07 18:15:19A: Let's have fun:B : Okay! 2017/10/07 18:15:21A: Let's have fun:B : Okay! 2017/10/07 18:15:23A: Let's have fun:B : Okay! 2017/10/07 18:15:25A: Let's have fun:B : Okay!

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