How to make text appear smoothly

[charvoa]

I know this is not an issue, but maybe this could be a great feature for Chatto.
I'd need to make the text appear smoothly when I update it

For example, there is two bubble :

User1 : "Hey Mate !" 

              "Hey Bro" : User2

And I want to change the text from user2 to :

User1 : "Hey Mate !" 

              "Hey Bro how are you ?" : User2

I'd like to make the ' how are you ?' part of the text appear smoothly with an alpha transition .

For example I'd want something like this : https://www.youtube.com/watch?v=9qnm_JPBtPA&feature=youtu.be&t=35s

Note : I already know how to modify the text, I just don't know how to make a part of the sentence (or the whole sentence) appear smoothly ...

What would be the solution ?

Thanks !

[mountaineer59]

Hey, I am facing an issue and you seem to know the solution for it. that is to modify a text in a bubble view.
can you please help me with it , I have already spent a lot of time searching through chatto source code, but couldn't find it. If you could help me, it'll save a ton of time. Besides, I'm new to swift. :)