无法停止计时器

Question

I have defined few tickers and when I try to stop them, I see below

undefined: ticker in ticker.Stop

undefined: Q30sticker in Q30sticker.Stop

Code sample:

if activenode() {
                    cipaflage = true
                    break

                } else {
                    if cipaflage == true {
                        defer ticker.Stop()
                        defer Q30sticker.Stop()
                        cipaflage = false
                        }
                    continue
                }

And I have declared the ticker as below

ticker := time.NewTicker(59 * time.Second)
Q30sticker := time.NewTicker(time.Second * 30).C

Answer 1

As per the docs here

Ticker has an exported field C.

type Ticker struct {
        C <-chan Time // The channel on which the ticks are delivered.
        // contains filtered or unexported fields
}

You can receive the "ticks", or heartbeats on the C channel, but if you are doing this:

Q30sticker := time.NewTicker(time.Second * 30).C

then Q30sticker holds a reference to the channel C and not the ticker type. It is the time.Ticker struct that defines the Stop method.

Update your variable to hold the ticker type (by removing .C):

Q30sticker := time.NewTicker(time.Second * 30)

And where you receive from the channel, use the . dot syntax to access the channel.

<-Q30sticker.C