SwiftUI learning materials

Although the language and syntax of SwiftUI are very familiar, some of the newly added controls are still very unfamiliar, so how to learn and understand.

目前官网有SwiftUI Tutorials:https://developer.apple.com/tutorials/swiftui/creating-and-combining-views

Document address: https://developer.apple.com/documentation/swiftui/

A small example on github (written by the author of Then): https://github.com/devxoul/SwiftUITodo