##Building a Speech-to-Text App Using Siri in iOS 10.

Since launch of Siri in IOS we are addicted to it and we are loving the powerful recognition power of Siri. But till now we don’t have access to Siri to use in IOS application. But since IOS 10 Siri is available to developer. Speech Kit is the framework which Siri uses for speech recognition. There are a handful of speech recognition frameworks available today, but they are either very expensive or simply not as good. In this article we will learn how to use Siri features in our app.

##Core Concept of the app

We will build one simple app to to recognize words from speech kit framework. We will show recognized texts in iPhone device.

##Setting up your environment

To use the Speech framework, you have to first import it and adopt the SFSpeechRecognizerDelegate protocol. So let’s import the framework, and add its protocol to the ViewController class. Now your ViewController.swift should look like this:

import UIKit
import Speech
 
class ViewController: UIViewController, SFSpeechRecognizerDelegate {
        
    @IBOutlet weak var textView: UITextView!
    @IBOutlet weak var microphoneButton: UIButton!
    
    override func viewDidLoad() {
        super.viewDidLoad()        
    }
 
    @IBAction func microphoneTapped(_ sender: AnyObject) { 
    } 
}

##Handle Authorization

Before using the speech framework for speech recognition, you have to first ask for users’ permission because the recognition doesn’t happen just locally on the iOS device but Apple’s servers. All the voice data is transmitted to Apple’s backend for processing. Therefore, it is mandatory to get the user’s authorization.

override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        
        SFSpeechRecognizer.requestAuthorization { authStatus in            
            OperationQueue.main.addOperation {
                switch authStatus {
                case .authorized:
                    self.recordBtn.isEnabled = true
                    
                case .denied:
                    self.recordBtn.isEnabled = false
                    self.recordBtn.setTitle("User denied access to speech recognition", for: .disabled)
                    
                case .restricted:
                    self.recordBtn.isEnabled = false
                    self.recordBtn.setTitle("Speech recognition restricted on this device", for: .disabled)
                    
                case .notDetermined:
                    self.recordBtn.isEnabled = false
                    self.recordBtn.setTitle("Speech recognition not yet authorized", for: .disabled)
                }
            }
        }
    }

     Till now you learned how to set up the Speech kit in your project and it’s basic necessary things. You will find more details in our demo project in github. Please check out it from here.