As far as I know , apple native framework doesn't have APIs for converting voice to text and we have to go for third party framework to do that and it has so many drawbacks like user has to microphone to convert from voice to text.
But I can find lots of information for converting text to voice but not the other way
Couldn't find any clear information about this and mostly it has so many uncertain things.
If someone could shed some light it'd be really great !
Following link may help you:
And its also have working code on github too.
Thanks.. let me know need more help.
I m not not an AppCode guy!!