Which engine to choose for iOS development?

Question

iOS

Good day!
I'm learning Objective-C with a hint of writing a game in Cocos2d in the future, but recently I've been thinking about using Unity. Because I have knowledge in the field of C ++, C # I think it will not be difficult, which means that it is much easier and faster to develop and release an application on Unity, is it so, or is it still worth objectifying for coconut (even if you write in Unity, after the first application everything I would still like to master Objective-C)?
I would also like to port not only under iOS, but also under Android, but so far this is not a mandatory parameter.

Answer 1

And what about C# in iOS applications, they say that native Obj is better?

For software, definitely.
You need to start with what is more popular, more in demand and easier - so there is a higher chance of finding a job in order to gain experience from colleagues.