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Spis treści

Head First Swift eBook -- spis treści

• Table of Contents (the real thing)
• how to use this book: Intro
  • Who is this book for?
    • Who should probably back away from this book?
  • We know what youre thinking
  • We know what your brain is thinking
  • Metacognition: thinking about thinking
  • Heres what WE did
  • Heres what YOU can do to bend your brain into submission
  • Read me
  • The technical review team
  • OReilly Online Learning
  • Acknowledgments
• 1. Introducing Swift: Apps, Systems, and Beyond!
  • Swift is a language for everything
  • The swift evolution of Swift
  • Swift into the future
  • How youre going to write Swift
  • The path youll be taking
  • Getting Playgrounds
    • Downloading and installing Playgrounds on macOS
  • Creating a Playground
  • Using a Playground to code Swift
  • Basic building blocks
  • A Swift example
  • Heres what you need to build
  • The print function
  • 1 Building a list of ingredients
  • 2 Picking four random ingredients
  • 3 Displaying our random pizza
  • Congrats on your first steps with Swift!
  • Swiftcross
  • Swiftcross Solution
• 2. Swift by Name: Swift by Nature
  • Building from the blocks
  • Basic operators
  • Operating swiftly with mathematics
    • Express yourself
  • Expressing yourself
  • Names and types: peas in a pod
  • Not all data is numbers
    • These are all types
  • Swift Safety
  • Stringing things along with types
  • Who am I?
  • String interpolation
  • Swiftcross
  • Swiftcross Solution
  • Who am I Solution?
• 3. Collecting and Controlling: Going Loopy for Data
  • Sorting pizzas
  • Swift collection types
  • Collecting values in an array
  • How big is that array, exactly? Is it empty?
  • Collecting values in a set
  • Collecting values in a dictionary
  • Tuples
  • Everyone needs a good alias
  • Control flow statements
  • if statements
  • switch statements
  • Building a switch statement
    • Start with the switch keyword
  • Range operators
  • More complex switch statements
  • Getting repetitive with loops
  • Building a for loop
  • Building a while loop
  • Building a repeat-while loop
  • Solving the pizza-sorting problem
  • Phew, thats a lot of Swift!
  • Code Magnets
  • Pool Puzzle
  • BE the Swift Compiler
  • Swiftcross
  • Code Magnets Solution
  • Pool Puzzle Solution
  • BE the Swift Compiler Solution
  • Swiftcross Solution
• 4. Functions and Enums: Reusing Code on Demand
  • Functions in Swift let you reuse code
    • What can functions do?
  • Built-in functions
  • What can we learn from built-in functions?
  • Improving the situation with a function
  • Writing the body of the function
  • Using functions
  • Functions deal in values
  • Many happy returns (from your functions)
    • But Swift is meant to make things simple...
  • A variable number of parameters
  • Fireside Chats
  • What can you pass to a function?
  • Every function has a type
  • Function types as parameter types
  • Multiple return types
  • Fireside Chats
  • Functions dont have to stand alone
    • Nested functions
  • Switching with enums
  • Functioncross
  • Functioncross Solution
• 5. Closures: Fancy, Flexible Functions
  • Meet the humble closure
  • Closures are better with parameters
  • Boiling it all down to something useful
    • The problem
    • The solution
  • Reducing with closures
  • Capturing values from the enclosing scope
    • What came first, the function or the closure?
  • Escaping closures: the contrived example
  • Autoclosures provide flexibility
    • The situation
    • The problem
    • The solution
  • Shorthand argument names
  • Closurecross
  • BE the Swift Compiler
  • Closurecross Solution
  • BE the Swift Compiler Solution
• 6. Structures, Properties, and Methods: Custom Types and Beyond
  • Lets make a pizza, in all its glory...
    • A Pizza struct
  • Under the hood...
  • The initializer behaves just like a function
    • Access control and structs
  • Methods inside structures
  • Changing properties using methods
  • Computed properties
    • Creating a property observer
  • Code Magnets
  • Getters and setters for computed properties
  • Implementing a setter
  • Swift Strings are actually structs
  • The case for lazy properties
  • Using lazy properties
  • Structcross
  • Structcross Solution
  • Code Magnets Solution
• 7. Classes, Actors, and Inheritance: Inheritance Is Always a Thing
  • A struct by any other name (that name: a class)
  • Inheritance and classes
  • Replacing Overriding methods
    • Heres our Plant class:
    • Heres our Succulent child class, overriding a method of the parent:
  • Under the hood...
  • Final classes
  • Automatic reference counting
  • Mutability
    • Beware
  • Swift Safety
  • Fireside Chats
  • BE the Swift Compiler
  • Pool Puzzle
  • Classcross
  • Pool Puzzle Solution
  • BE the Swift Compiler Solution
  • Classcross Solution
• 8. Protocols and Extensions: A Swift Lesson in Protocol
  • The Robot Factory
    • The problem:
    • A solution:
  • Protocol inheritance
  • Mutating methods
  • Protocol types and collections
  • Computed properties in extensions
    • Useful extensions and you
    • Adding an initializer (with an extension)
  • Extending a protocol
  • Useful protocols and you
    • Protocol composition
  • Conforming to Swifts protocols
    • Sequences
    • Conforming to Sequence and IteratorProtocol:
    • Using your new sequence:
    • Equatable
    • The problem
    • Conforming to Equatable:
    • Implementing ==
  • Code Magnets
  • Protocolcross
  • BE the Swift Compiler
  • Code Magnets Solution
  • Protocolcross Solution
  • BE the Swift Compiler Solution
• 9. Optionals, Unwrapping, Generics, and More: Nothing Optional About It
  • Optionals Exposed
  • Dealing with something thats missing
    • The problem
  • Why you might need an optional
    • The struct for Josh is good, it represents Josh reasonably well: Josh is named Josh, and theyve consumed 5 coffees.
    • But the struct for Tom doesnt really represent them. They havent really consumed 0 coffees; they dont drink it at all.
  • Optionals and handling missing data
    • A Person
    • Alex and Tom
  • Unwrapping optionals
  • Unwrapping optionals with guard
    • Using guard let to unwrap an optional:
  • Force unwrapping
  • Swift Safety
  • BE the Swift Compiler
  • Swift Safety
  • Generics
    • Queue requirements
  • A queue with generics
  • Heres our new Queue type
    • Using your Queue
  • Optionalcross
  • Optionalcross Solution
  • BE the Swift Compiler Solution
• 10. Getting Started With Swiftui: User InterfacesSwiftly
  • Whats a UI framework, anyway?
  • Your first SwiftUI UI
  • UI building blocks
  • Making a list, checking itquite a few times, to get it perfect
  • User interfaces with state
  • Buttons are for pressing
  • Lets see how far youve come
  • Customizing your views with modifiers
    • Using view modifiers:
    • Order matters (sometimes):
  • Create a new SwiftUI Xcode project, for iOS
  • Your Xcode will look something like this
  • Create a new type to store a todo item in
  • Make sure each todo item can be uniquely identified
  • Create a user interface for the app
    • Whats going on in this user interface?
  • Create a user interface for the app, continued, continued
    • Making the List actually list todos
  • Test Drive
  • Implement a way to save the list of todos
  • So, thats a UI framework?
  • SwiftUIcross
  • Pool Puzzle
  • BE the Swift Compiler
  • SwiftUIcross Solution
  • Pool Puzzle Solution
  • BE the Swift Compiler Solution
• 11. Putting Swiftui into Practice: Circles, Timers, ButtonsOh My!
  • What fancy things can be done with a UI framework?
  • Create a new SwiftUI Xcode project, for iOS
  • The Executive Timer UI and features
    • This is what our Executive Timer UI will look like, and do:
    • And this is what the UI will look like in the various different states:
  • Creating the basic elements of the app
  • Pieces of the UI
  • Setting up the UI of the Executive Timer
  • Coding the pieces of the UI
    • 1 Coding the gray circle
    • 2 Coding the gray circle
    • 3 Coding the time and buttons
  • Combining the three elements
  • The finishing touches
  • Test Drive
  • Tabbed views for a clean UI
  • 1 Create however many different views you need (to live in tabs)
  • 2 Build a TabView containing your views
  • The resulting tabs
    • If you created three views, and a TabView containing them, you might end up here:
  • Creating a new tabbed ContentView
  • Creating the tabs and the TabView
    • 1 Create an empty TimerSettingsView view
    • 2 Add the second tab to the TabView in the ContentView
    • Were basically done! The Executive Timer now has tabs:
  • Running your new tabbed Executive Timer
  • SwiftUIcross
  • SwiftUIcross Solution
• 12. Apps, web, and Beyond: Putting It All Together
  • A journey must end...
  • A recipe for a welcome screen
  • Step by step assembly of the welcome screen
  • Smash Share the state
  • Its time for our old friend...
    • Heres a type that represents the score of a game:
    • Heres some views that use our class:
  • Building an app with multiple views that share state
    • Heres the first view of our hypothetical app:
    • Heres the second view of our hypothetical app:
  • Building a two-view score tracker
    • Heres what well need to do:
  • The ObservableObject
  • The first view
  • The second view
  • The first view, again
  • A fancy AsyncImage
    • Like this:
    • We do this:
  • Meet Vapor, the Swift web framework
    • 1 You can make a new Vapor project with the following command:
    • 2 Change into the Vapor projects directory with this command:
    • 3 Then run this to open the new Vapor project in Xcode:
  • Sending data over the web with Vapor
    • 1 Create a new closure, with a dynamic parameter:
    • 2 Add a guard let to unwrap the optional parameter:
    • 3 Return what you need to return
    • 4 Visit your new URL
  • SwiftUIcross
  • SwiftUIcross
  • SwiftUIcross Solution
• Index