Swift in 24 Hours, Sams Teach Yourself

Content: Introduction   xvHOUR 1: Introducing the Swift Development Environment   1What Is Swift?    2Getting Started   2Summary   9Q&A   10Workshop   10Exercise   11HOUR 2: Learning Swift's Fundamental Data Types   13Constants in Swift   13Variables in Swift    14Introducing Data Types   15Summary   23Q&A   24Workshop   24Exercise   25HOUR 3: Using Operators in Swift   27Unary Operators   27Binary Operators   29Ternary Conditional Operators   35Summary   35Q&A   36Workshop   36Exercise   37HOUR 4: Working with Collection Types   39Arrays   39Dictionaries   46Tuples   50Summary   51Q&A   51Workshop   52Exercise   52HOUR 5: Understanding Optional Values   53What Are Optional Values?    53How to Designate a Variable as Optional    54Wrapping and Unwrapping Optional Variables   54Use Case for Optionals   58Summary   61Q&A   62Workshop   62Exercise   63HOUR 6: Controlling Program Flow with Conditionals   65The if Statement    65The switch Statement    70Summary   77Q&A   78Workshop   78Exercise   80HOUR 7: Iterating Code with Loops   81Two Categories of Loops   81Transferring Control in Loops   93Summary   95Q&A   95Workshop   96Exercise   97HOUR 8: Using Functions to Perform Actions   99The Nature of Functions in Swift   100General Function Syntax and Structure   100Functions with No Parameters and No Return Type   102The Type of a Function   102Functions with Parameters   103Functions with Variadic Parameters   105Functions with Return Types   106External Parameter Names   111Default Parameter Values   112Change Argument Values with In-Out Parameters   112Summary   113Q&A   114Workshop   114Exercise   115HOUR 9: Understanding Higher Order Functions and Closures   117Higher Order Functions   117Closures   124Summary   132Q&A   133Workshop   133Exercise   135HOUR 10: Learning About Structs and Classes   137Overview of Structs and Classes in Swift   137What Swift Structs and Classes Have in Common   139Differences Between Structs and Classes   147When to Use a Class or a Struct   150Summary   151Q&A   151Workshop   152Exercise   153HOUR 11: Implementing Class Inheritance   155What Is Inheritance?    155Identifying a Base Class   156Creating a Subclass   157Overriding Inherited Methods   159Accessing super   162Preventing Overrides   164Class Identity   166Summary   167Q&A   168Workshop   169Exercise   170HOUR 12: Harnessing the Power of Enums   171Understanding Swift Enums   171Swift Enum Structure   172Raw Values   173Enum Shorthand Syntax   175Associated Values   177Switching Enum Values   178Adding Instance Methods to Enums   180Summary   182Q&A   183Workshop   183Exercise   184HOUR 13: Customizing Initializers of Classes, Structs, and Enums   185Initialization   185Initializing Value Types   187Advanced Initialization   193Summary   201Q&A    202Workshop   202Exercise   203HOUR 14: Digging Deeper with Properties   205Stored Properties   206Computed Properties   209Property Accessors   209Property Observers   212Inheriting and Overriding Accessors   215Inheriting and Overriding Observers   217Summary   221Q&A   221Workshop   222Exercise   222HOUR 15: Adding Advanced Type Functionality   223Type Properties and Methods   223Type Aliasing   229Type Access Control   230Subscripts   231Type Casting and Non-Specific Types   235Summary   239Q&A   239Workshop   240Exercise   241HOUR 16: Understanding Memory Allocation and References   243Deinitialization   243Automatic Reference Counting   247Summary   259Q&A   260Workshop   261Exercise   261HOUR 17: Using Protocols to Define Behavior   263Defining Protocols   263Creating and Adopting Protocols   264Properties   265Defining Methods in Protocols   266Using Protocol Names as Types   268Adopting and Inheriting Multiple Protocols   269Optional Protocol Properties and Methods   273How to Check for Protocol Conformance   275Using Protocols for Delegation   275Summary   280Q&A   281Workshop   282Exercise   282HOUR 18: Using Extensions to Add Type Functionality   285Defining Extensions   285Adding Functionality with Extensions   287Summary   297Q&A   297Workshop   298Exercise   298HOUR 19: Working with Optional Chaining   301Defining Optional Chaining   301Chaining Optional Properties   302Subscripts   303Methods   308Summary   310Q&A   311Workshop   311Exercise   312HOUR 20: Introducing Generics   313An Introduction to Generics   313Type Parameters and Placeholder Types   314Specifying Type Constraints   315Creating Generic Types   319Extending Generic Types   322Using Associated Types in Protocols   323Summary   325Q&A   326Workshop   326Exercise   327HOUR 21: Adding Interoperability with Objective-C   329Objective-C Basics   329Bridging   335Integrating Swift into an Objective-C App   337Summary   346Q&A   347Workshop   348Exercise   348HOUR 22: Interacting with User Interfaces   351Interface Introduction   351Interface Definitions   352Building an Interface   353Creating Your Own Project   355Adding UI Elements   355Summary   369Q&A   370Workshop   370Exercise   371HOUR 23: Asynchronous Programming in Swift   373The Problem That Concurrency Solves   373Different Types of Queues   374Asynchronous Programming in Action   376Add iTunes Search to Songs App   380Parsing JSON   383Summary   390Q&A   390Workshop   391Exercise   392HOUR 24: Learning Swift's Standard Library Functions   393What Is a Standard Library?    393Numeric Types   394String Type   394Protocols   395Functional Functions   399Global Functions   401Summary   404Q&A   405Workshop   405Exercise   406Index   409