Development of an application for IOS on Swift 3, Xcode 8?

Question

Swift

Hello!
I started learning Swift to develop a social application and at the very beginning a lot of questions appeared. Tell me how to connect and how to work with the database and which one is better? How to make user registration through social networks or through mail ... and which of these options is better? (If using your own examples, it will be great!)

Answer 1

Apple has a framework - CoreData (It may seem a bit complicated at first)
Here you can read how to work with it:
1) https://habrahabr.ru/post/303512/
2) https://stfalcon.com/ru/blog/post /hello-coredata#more
If you are writing a social application, then most likely you need a server and Api)
Also, you can look at Google firebase - https://firebase.google.com/
On account of user registration through social networks - https:/ /developers.facebook.com/docs/swift
and https://vk.com/dev/ios_sdk