How much skill do I need to have in order to get a job in iOS?

If you go into a company with a gunner, you won't have high expectations for technology, and if you go into practice without a gun, you'll ask for the same technology, but it's up to the people who applied, so it's hard to judge and say "you have to have some skills."

Objective-C is an open source, and projects that have been going on for a long time have not yet been fully transferred to Swift, so I think we should be able to read the project code in Objective-C to some extent. (The lifecycle and the overall flow are not much different. )

And I think it would be enough to convert the code to Swift for Objective-C. (Of course it's difficult. There are a lot of confusing parts, and if you search it on Google, you can find everything.)

And it may be difficult, but it is also a good way to code reading while looking at open source or projects that others do. There's a lot of monsters in the world. I think there are a lot of ways to go towards my goal.)

If there is anything wrong, please let me know in the comments and I will correct it :)