[TOC] ## 概述 golang有三種方式實現定時器： 1. ticker 2. timer 3. select ## Ticker 通過 time.NewTicker(d)的方式實現定時器 ```golang d := time.Duration(time.Second * 2) t1 := time.NewTicker(d) defer t1.Stop() go func() { for { <- t1.C fmt.Println("NewTicker...") } }() ``` ## Timer 通過 time.NewTimer(d)的方式實現定時器 ```golang t2 := time.NewTimer(d) defer t2.Stop() go func() { for { <- t2.C fmt.Println("NewTimer...") } }() ``` ## select 通過select的方式實現定時器： ```golang for { select { case <- time.After(d): fmt.Println("select...") } } ``` ## 三種定時器示例代碼 ```golang package main import ( "fmt" "time" ) func main() { d := time.Duration(time.Second * 2) t1 := time.NewTicker(d) defer t1.Stop() go func() { for { <- t1.C fmt.Println("NewTicker...") } }() t2 := time.NewTimer(d) defer t2.Stop() go func() { for { <- t2.C fmt.Println("NewTimer...") } }() for { select { case <- time.After(d): fmt.Println("select...") } } } ```