Darigaaz 的答案适用于单个 goroutine，但关闭关闭的通道会出现恐慌（在这种情况下您也不需要等待组）。如果您有多个 goroutine，并且希望循环在所有这些都完成后退出，请使用具有更接近例程的等待组：
https://play.golang.org/p/RhmUzWhneT
package main
import (
"fmt"
"sync"
"time"
)
func main() {
var wg sync.WaitGroup
quitCh := make(chan struct{})
for i := 1; i <= 5; i++ {
wg.Add(1)
go func(i int) {
count := 1
t := time.NewTicker(time.Millisecond)
for count <= 5 {
fmt.Printf("Goroutine %v iteration %v\n", i, count)
count++
<-t.C
}
wg.Done()
}(i)
}
// This is the closer routine.
go func() {
wg.Wait()
close(quitCh)
}()
t := time.NewTicker(500 * time.Microsecond)
loop:
for i := 1; ; i++ { // this is still infinite
select {
case <-quitCh:
break loop // has to be named, because "break" applies to the select otherwise
case <-t.C:
fmt.Println("Main iteration", i)
}
}
fmt.Println("End!")
}
作为命名循环样式的替代方案，您可以在该选择中使用fallthrough break：
for i := 1; ; i++ { // this is still infinite
select {
case <-quitCh:
// fallthrough
case <-t.C:
fmt.Println("Main iteration", i)
continue
}
break // only reached if the quitCh case happens
}