Tick和After的对比使用

func TickTest() {
	time1 := time.Tick(time.Second) //重复定时器
	for {
		select {
		case time := <-time1:
			fmt.Println(time)
		}
	}

	ch := make(chan string)
	go func() {
		time.Sleep(time.Second * 2)
		ch <- "success"
	}()
	time2 := time.After(time.Second * 3) // 一次性定时器，可用作超时控制
	select {
	case rs := <-ch:
		fmt.Println(rs)
	case <-time2:
		fmt.Println("timeout!")
	}

}