Gold Challenge: Speed and Size
by Aaron Hillegass, Christian Keur
iOS Programming: The Big Nerd Ranch Guide, 6th Edition
- Cover Page
- Title Page
- Introduction
- 1. A Simple iOS Application
- Creating an Xcode Project
- Model-View-Controller
- Designing Quiz
- Interface Builder
- Building the Interface
- Creating view objects
- Configuring view objects
- Running on the simulator
- A brief introduction to Auto Layout
- Making connections
- Creating the Model Layer
- Implementing action methods
- Loading the first question
- Building the Finished Application
- Application Icons
- Launch Screen
- 2. The Swift Language
- Types in Swift
- Using Standard Types
- Inferring types
- Specifying types
- Literals and subscripting
- Initializers
- Properties
- Instance methods
- Optionals
- Subscripting dictionaries
- Loops and String Interpolation
- Enumerations and the Switch Statement
- Enumerations and raw values
- Exploring Apple’s Swift Documentation
- 3. Views and the View Hierarchy
- View Basics
- The View Hierarchy
- Creating a New Project
- Views and Frames
- Customizing the labels
- The Auto Layout System
- The alignment rectangle and layout attributes
- Constraints
- Adding constraints in Interface Builder
- Intrinsic content size
- Misplaced views
- Adding more constraints
- Bronze Challenge: More Auto Layout Practice
- 4. Text Input and Delegation
- 5. View Controllers
- 6. Programmatic Views
- Creating a View Programmatically
- Programmatic Constraints
- Anchors
- Activating constraints
- Layout guides
- Margins
- Explicit constraints
- Programmatic Controls
- Bronze Challenge: Another Tab
- Silver Challenge: User’s Location
- Gold Challenge: Dropping Pins
- For the More Curious: NSAutoresizingMaskLayoutConstraint
- 7. Localization
- 8. Controlling Animations
- 9. Debugging
- 10. UITableView and UITableViewController
- Beginning the Homepwner Application
- UITableViewController
- Subclassing UITableViewController
- Creating the Item Class
- Custom initializers
- UITableView’s Data Source
- Giving the controller access to the store
- Implementing data source methods
- UITableViewCells
- Creating and retrieving UITableViewCells
- Reusing UITableViewCells
- Content Insets
- Bronze Challenge: Sections
- Silver Challenge: Constant Rows
- Gold Challenge: Customizing the Table
- 11. Editing UITableView
- 12. Subclassing UITableViewCell
- 13. Stack Views
- 14. UINavigationController
- UINavigationController
- Navigating with UINavigationController
- Appearing and Disappearing Views
- Dismissing the Keyboard
- Event handling basics
- Dismissing by pressing the Return key
- Dismissing by tapping elsewhere
- UINavigationBar
- Adding buttons to the navigation bar
- Bronze Challenge: Displaying a Number Pad
- Silver Challenge: A Custom UITextField
- Gold Challenge: Pushing More View Controllers
- 15. Camera
- Displaying Images and UIImageView
- Adding a camera button
- Taking Pictures and UIImagePickerController
- Setting the image picker’s sourceType
- Setting the image picker’s delegate
- Presenting the image picker modally
- Permissions
- Saving the image
- Creating ImageStore
- Giving View Controllers Access to the Image Store
- Creating and Using Keys
- Wrapping Up ImageStore
- Bronze Challenge: Editing an Image
- Silver Challenge: Removing an Image
- Gold Challenge: Camera Overlay
- For the More Curious: Navigating Implementation Files
- // MARK:
- 16. Saving, Loading, and Application States
- Archiving
- Application Sandbox
- Constructing a file URL
- NSKeyedArchiver and NSKeyedUnarchiver
- Loading files
- Application States and Transitions
- Writing to the Filesystem with Data
- Error Handling
- Bronze Challenge: PNG
- For the More Curious: Application State Transitions
- For the More Curious: Reading and Writing to the Filesystem
- For the More Curious: The Application Bundle
- 17. Size Classes
- 18. Touch Events and UIResponder
- Touch Events
- Creating the TouchTracker Application
- Creating the Line Struct
- Structs
- Value types vs reference types
- Creating DrawView
- Drawing with DrawView
- Turning Touches into Lines
- Handling multiple touches
- @IBInspectable
- Silver Challenge: Colors
- Gold Challenge: Circles
- For the More Curious: The Responder Chain
- For the More Curious: UIControl
- 19. UIGestureRecognizer and UIMenuController
- UIGestureRecognizer Subclasses
- Detecting Taps with UITapGestureRecognizer
- Multiple Gesture Recognizers
- UIMenuController
- More Gesture Recognizers
- UILongPressGestureRecognizer
- UIPanGestureRecognizer and simultaneous recognizers
- More on UIGestureRecognizer
- Silver Challenge: Mysterious Lines
- Gold Challenge: Speed and Size
- Platinum Challenge: Colors
- For the More Curious: UIMenuController and UIResponderStandardEditActions
- 20. Web Services
- Starting the Photorama Application
- Building the URL
- Formatting URLs and requests
- URLComponents
- Sending the Request
- URLSession
- Modeling the Photo
- JSON Data
- JSONSerialization
- Enumerations and associated values
- Parsing JSON data
- Downloading and Displaying the Image Data
- The Main Thread
- Bronze Challenge: Printing the Response Information
- Silver Challenge: Fetch Recent Photos from Flickr
- For the More Curious: HTTP
- 21. Collection Views
- 22. Core Data
- Object Graphs
- Entities
- Modeling entities
- Transformable attributes
- NSManagedObject and subclasses
- NSPersistentContainer
- Updating Items
- Inserting into the context
- Saving changes
- Updating the Data Source
- Fetch requests and predicates
- Bronze Challenge: Photo View Count
- For the More Curious: The Core Data Stack
- NSManagedObjectModel
- NSPersistentStoreCoordinator
- NSManagedObjectContext
- 23. Core Data Relationships
- 24. Accessibility
- 25. Afterword
- Index
Piggy-back off of the pan gesture recognizer to record the velocity of the pan when you are drawing a line. Adjust the thickness of the line being drawn based on this speed. Make no assumptions about how small or large the velocity value of the pan recognizer can be. (In other words, log a variety of velocities to the console first.)
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