How to do Map Navigation for iPhone support?

Here is Google Map Navigation for Android Mobiles:

http://www.youtube.com/watch?v=lwggXqMZZ8w

Can we achieve this functionality for i开发者_StackOverflow社区phone? Is there any map api available for this which provides directions and details on GPS bases as well text (source to destination) bases?

If Yes, please provide some links regarding those.

It is against google's terms of service (relating to MapKit) to do turn by turn navigation, however you can work around it using the google maps web api and create custom code.

For speech recognition you can use this:

I used Open Ears, which was quite easy and works really fine for text-to-speech and recognition.

OpenEars is an open source framework for performing continuous speech recognition, text-to-speech, and language model generation in iOS. It uses the CMU Pocketsphinx, CMU Flite and MITLM libraries.