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以下章节需要有其它语言基础（java、OC、C等）,主要总结了一些swift的新特性和与OC的区别

0.The Basics

1.Basic Operators

2.Strings and Characters

3.Collection Types

4.Control Flow

5.Functions

6.Closures

7.Enumerations

8.Classes and Structures

9.Properties

10.Methods

11.Subscripts

12.Inheritance

13.Initialization

14.Deinitialization

15.Automatic Reference Counting

16.Optional Chaining

17.Error Handling

18.Type Casting

19.Nested Types

20.Extensions

21.Protocols

22.Generics

23.Access Control

24.Advanced Operators