It’s a bit of a tricky process, but once you understand how everything works, all will become pretty clear. Tracking the progress might be something that you won’t need in your apps, but if you will, then here you’ll see how you can achieve that. It contains useful delegate methods that if they get used properly, they allow to keep track of the progress of the speech, and the currently spoken text too. To speak many pieces of text, meaning many utterances, doesn’t require any effort at all all it takes is to set the utterances to the synthesizer in the order that should be spoken, and the synthesizer automatically queues them.Īlong with the AVSpeechSynthesizer class comes the the AVSpeechSynthesizerDelegate protocol. Once an utterance object has been properly configured, it’s passed to a speech synthesizer object so the system starts producing the speech. It always matches to a specific language, and up to now Apple supports 37 different voices, meaning voices for 37 different locales (we’ll talk about that later). A voice is an object of the AVSpeechSynthesisVoice class. Also, an utterance object defines the voice that will be used for speaking. There are a few more, but we’ll see them in a while. The most important of those properties that the AVSpeechUtterance class handles (besides the text) are the speech rate, pitch and volume. An object of this class represents a piece of text that should be spoken, and to put it really simply, an utterance is actually the text that’s about to be spoken, enriched with some properties regarding the final output. There’s an intermediate class that does that job, and is called AVSpeechUtterance. However, it doesn’t interact directly with the text. It’s capable of initiating, pausing, stopping and continuing a speech process. The AVSpeechSynthesizer is the responsible class for carrying out the heavy work of converting text to speech. ![]() The AVSpeechSynthesizer class, along with some other classes, can produce speech based on a given text (or multiple pieces of text), and provides the possibility to configure various properties regarding it. To make things more precise, iOS 7 introduced a new class named AVSpeechSynthesizer, and as you understand from its prefix it’s part of the powerful AVFoundation framework. Since iOS 7 dealing with TTS has been really easy, as the code required to make an app speak is straightforward and easy to be handled. Text-to-speech (TTS) is not something new in iOS 8. ![]() Also, there are numerous technologies one could exploit, and in this tutorial we are going to focus on one of them, which is no other than the Text to Speech. There are times where applications have to be multi-featured, providing elegant solutions that exceed the limits of the common places, and lead to a superb user experience. IOS is an operating system with many possibilities, allowing to create from really simple to super-advanced applications. IOS Building a Text to Speech App Using AVSpeechSynthesizer
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |