blog-speech-framework-02.swift

private func askForSpeechRecognitionPermissions() {
    SFSpeechRecognizer.requestAuthorization { authStatus in
            
    	var enabled: Bool = false
        var message: String?
            
        switch authStatus {
                
            case .authorized:
        	    enabled = true
                
            case .denied:
                enabled = false
                message = "User denied access to speech recognition"
                
            case .restricted:
                enabled = false
                message = "Speech recognition restricted on this device"
                
            case .notDetermined:
                enabled = false
                message = "Speech recognition not yet authorized"
        }
        
        /* The callback may not be called on the main thread. Add an operation to the main queue if you want to perform action on UI. */     
        
        OperationQueue.main.addOperation {
        	// here you can perform UI action, e.g. enable or disable a record button
        }
    }
}