首次提交：初始化项目代码

time/time_demo_4.go

@@ -0,0 +1,32 @@
+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")
+}