34 lines
504 B
Go
34 lines
504 B
Go
package main
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import (
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"fmt"
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"time"
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)
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func main() {
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ch := make(chan int)
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go func() {
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for i := 1; i <= 5; i++ {
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time.Sleep(500 * time.Millisecond)
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ch <- i
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}
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close(ch)
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}()
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for {
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select {
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case v, ok := <-ch:
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if !ok {
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fmt.Println("channel 已关闭，退出循环")
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return
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}
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fmt.Println("收到:", v)
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default:
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// 没有数据可读时，做点“其他事”
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fmt.Println("没有新数据，先忙点别的...")
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time.Sleep(200 * time.Millisecond)
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}
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}
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}
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