iOS Text To Speech Api

Since iOS 7 you have a new TTS Api.

In Objective C

AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc]init];AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:@"Some text"];[utterance setRate:0.2f];[synthesizer speakUtterance:utterance];

In Swift

let synthesizer = AVSpeechSynthesizer()let utterance = AVSpeechUtterance(string: "Some text")utterance.rate = 0.2

You can also change the voice like this :

utterance.voice = AVSpeechSynthesisVoice(language: "fr-FR")

And then speek

• In Swift 2synthesizer.speakUtterance(utterance)

• In Swift 3synthesizer.speak(utterance)

Don't forget to import AVFoundation

Helpful methods

You can Stop or Pause all speech using these two methods :

- (BOOL)pauseSpeakingAtBoundary:(AVSpeechBoundary)boundary;- (BOOL)stopSpeakingAtBoundary:(AVSpeechBoundary)boundary;

The AVSpeechBoundary indicates if the speech should pause or stop immediately (AVSpeechBoundaryImmediate) or it should pause or stop after the word currently being spoken (AVSpeechBoundaryWord).

Check the AVSpeechSynthesizer Doc

This is Ali ABBAS' answer for use in a playground:

import UIKitimport AVKitimport AVFoundationimport PlaygroundSupportvar str = "Hello, playground"let synthesizer = AVSpeechSynthesizer()let utterance = AVSpeechUtterance(string: str)utterance.rate = 0.4utterance.voice = AVSpeechSynthesisVoice(language: "en-US")//for playground onlylet playerViewController = AVPlayerViewController()PlaygroundPage.current.liveView = playerViewController.view//synthesizer.speak(utterance)    

I have never done any work specifically with Siri. I may be wrong, but I think integrating with Siri is very difficult using private API's.

I would take a look at the openears framework for IOS. I have done some basic work with this in the past and it does both offline speech recognition and synthesized speech/text-to-speech

Hope this helps you.