package main

import (
	"fmt"
	"time"
)

func main() {
	ticker := time.NewTicker(500 * time.Millisecond)
	defer ticker.Stop()
	done := make(chan bool)
	count := 0

	go func() {
		for {
			select {
			case t := <-ticker.C:
				count++
				fmt.Println("触发:", t.Format("15:04:05"))
				if count >= 5 {
					done <- true
					return
				}
			case <-done:
				return
			}
		}
	}()

	<-done
	fmt.Println("Ticker 已停止")
}