Learning resources
Apple
The Swift Programming Language (Swift 4.0.3) by Apple https://itunes.apple.com/us/book/the-swift-programming-language-swift-4-0-3/id881256329?mt=11
App Development with Swift by Apple https://itunes.apple.com/us/book/app-development-with-swift/id1219117996?mt=11
Paul Hudson
Hacking with Swift https://www.hackingwithswift.com/read
Sean Allen https://m.youtube.com/channel/UCbTw29mcP12YlTt1EpUaVJw
Lets Build That App https://m.youtube.com/channel/UCuP2vJ6kRutQBfRmdcI92mA
Ray Wenderlich https://www.raywenderlich.com/
Bonus!!
Lynda.com
https://www.lynda.com/portal/sip