Swift: stop speech recognition after x seconds of silence

This is what ended up working for me:

func restartSpeechTimer() {    timer?.invalidate()    timer = Timer.scheduledTimer(withTimeInterval: 1.5, repeats: false, block: { (timer) in        // Do whatever needs to be done when the timer expires    })}

And inside the recognition task:

var isFinal = falseif letresult = result {    // do something with the result    isFinal = result.isFinal}if iFinal {    self.stopRecording()}else if error == nil {    self.restartSpeechTimer()}

I had the same issue until now. Checked your question and I suppose the code below helps you achieve the same thing I did.

recognitionTask = speechRecognizer?.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in        var isFinal = false        if result != nil {            self.inputTextView.text = result?.bestTranscription.formattedString            isFinal = (result?.isFinal)!        }        if let timer = self.detectionTimer, timer.isValid {            if isFinal {                self.inputTextView.text = ""                self.textViewDidChange(self.inputTextView)                self.detectionTimer?.invalidate()            }        } else {            self.detectionTimer = Timer.scheduledTimer(withTimeInterval: 1.5, repeats: false, block: { (timer) in                self.handleSend()                isFinal = true                timer.invalidate()            })        }    })

This checks if input wasn't received for 1.5 seconds.