iOS development for Android developer. Brief and quick :) part 1 / 3

Классика

https://developer.apple.com/swift/

https://docs.swift.org/swift-book/index.html

https://itunes.apple.com/us/course/developing-ios-11-apps-with-swift/id1309275316

https://bestkora.com/IosDeveloper/ios-11-swift-4/

Рекомендуют, вроде

https://www.udemy.com/ios11-swift-4/