The so-called original ability, I think it's through imitation with deep thinking. This Repository is my imitation collections. All codes and extensions related to swift/ios part in the list of:
http://www.douban.com/doulist/608714

Introducing-iOS8-Swift

All the demo codes,learning codes,examine codes of swift. http://book.douban.com/subject/26166179/

Swift-Pocket-Reference

Swift Pocket Reference https://book.douban.com/subject/26279788/

SWIFT ALGORITHMS & DATA STRUCTURES

https://book.douban.com/subject/26934116/

iOS Programming : The Big Nerd Ranch Guide

https://book.douban.com/subject/26932891/

Beginning iPhone Development with Swift 3

https://book.douban.com/subject/26919791/

iOS 10 SDK Development

https://book.douban.com/subject/26893004/

Swift 2 By Example

https://book.douban.com/subject/27133692/

Test-Driven iOS Development with Swift 3

https://book.douban.com/subject/26944682/

Mastering Swift 4

https://book.douban.com/subject/27599405/

Mastering iOS 11 Programming

https://book.douban.com/subject/27601406/

Learning iOS UI Development

https://book.douban.com/subject/26765879/