Hacking with Swift

Place to hold my solutions for the Hacking With Swift training series

Table of Contents

• Table of Contents
  • Project 1 - Storm Viewer
  • Project 2 - Guess the Flag
  • Project 3 - Social Media
  • Project 4 - Easy Browser
  • Project 5 - Word Scramble
  • Project 6 - Auto Layout
  • Project 7 - Whitehouse Petitions
  • Project 8 - Swifty Words
  • Project 9 - Grand Central Dispatch
  • Project 10 - Names to Faces
  • Project 11 - SpriteKit
  • Project 12 - UserDefaults
    • Using NSCoding
    • Using Codable
  • Project 13 - Instafilter
  • Project 14 - What-a-Penguin
  • Project 15 - Animation
  • Project 16 - Javascript Injection
  • Project 17 - Swifty Ninja
  • Project 18 - Debugging
  • Project 19 - Capital Cities
  • Project 20 - Fireworks Night
  • Project 20 - Fireworks Night
  • Project 21 - Local Notifications
  • Project 22 - Detect-a-Beacon
  • Project 23 - Per-Pixel Collision Detection
  • Project 24 - Swift Extensions
  • Project 25 - multipeer connectivity
  • Project 26 - Marble Maze

Project 1 - Storm Viewer

Project 2 - Guess the Flag

Project 3 - Social Media

Project 4 - Easy Browser

Project 5 - Word Scramble

Project 6 - Auto Layout

In this project we fix vertical spacing for project 2 so that it will work in landscape mode, and we learn how to programmatically add constraints to our UI

Project 7 - Whitehouse Petitions

In this project we learned:

• How to use UITabBarController to reuse one interface design for multiple similar interfaces.
• Create a ViewController class that isn't in the storyboard, but just pushed onto the view in code.

Project 8 - Swifty Words

In this project we learned:

• programmatically added a method to a button press with .addTarget()
• used .enumerated() on an array to get the element and the elements index as a tuple
• Strings:
• .index(of:) - find index of element in array
• .joined(separator:) - join array of String with "separator"
• .replacingOccurencesOf() - replace all occurrences of X with Y
• .forEach { $0.function() } - to execute method on every object in array of objects

Project 9 - Grand Central Dispatch

In this project we learned about Grand Central Dispatch (GCD). Specifically:

• DispatchQueue.main.async { ...}
• .performSelector(onMainThread:)
• DispatchQueue.global(qos: .userInitiated).async { ... }
• .performSelector(inBackground:)

Project 10 - Names to Faces

Here we learned:

• UIImagePcikerController to pick an image from the camera roll
• custom class (Person)
• cellForItemAt, numberOfItemsInSection, didSelectItemAt for UICollectionViewController is very similar to the "ForRowAt" methods in UITableViewController
• UIIImage(ContentsOfFile:) to read in data as an image (like reading a file in as [String])
• UIImageJPEGRepresentation() to convert a UIImage object to a Data object
• Data.write(to:) to write data to a file in ~/Documents/

Project 11 - SpriteKit

Here we learned about SpriteKit. Specifically:

• SpriteKit
• SKSpriteNode
• SKAction
• SKLabelNode
• SKEmitterNode

Project 12 - UserDefaults

Using NSCoding

• Good for mingling Swift with Objective-C
• UserDefaults
• NSKeyedArchiver

Using Codable

• Better if pure Swift
• Codable interface
• JSONEncoder
• JSONDecoder

Project 13 - Instafilter

• UISlider
• kCIInputImageKey
• kCIInputRadiusKey
• kCIInputScaleKey
• kCIInputCenterKey
• kCIInputIntensityKey
• CIImage
• CGImage
• CIFilter
• CIBumpDistortion
• UIImageWriteToSavedPhotosAlbum
• Info.plist - Privacy - Photo Library Usage Description
• Info.plist - Privacy - Photo Library Additions Usage Description

Project 14 - What-a-Penguin

• SKCropNode
• SKTexture
• SKAction
• GDD's asyncAfter()
• *.caf sound files
  • check target membership in file inspector if it appears the file is inaccessible
• scale SKSpriteNode

Project 15 - Animation

• UIView.animate() - takes two closures
  • default animatons versus "spring" animations
• CGAffineTransform
  • CGAffineTransform(scaleX: 2, y: 2) to double the size
  • CGAffineTransform.identity to reset to original
  • CGAffineTransform(translationX: -256, y: -256) to move the object up and to the left (negative number)
  • CGAffineTransform(rotationAngle:CGFloat.pi) - rotation angle in radians - 2*pi is 360 degrees in radians
• imageView.alpha - 0 to 1. 0 fully transparent, 1 fully opaque

Project 16 - Javascript Injection

• Safari Extension
• ActionViewController
• NSExtensionContext
• NSItemProvider
• loadItem(forTypeIdentifier: )
• In the Extension's info.plist: NSExtension
  • NSExtensionAttributes
    • NSExtensionActivationRule
      • NSExtensionActivationSupportsWebPageWithMaxCount
    • NSExtensionJavaScriptPreprocessingFile
• NSDictionary
• adjust screen for on screen keyboard so you can see whole screen
  • NotificationCenter
    • UIKeyboardWillHide
    • UIKeyboardWillChangeFrame
    • UIKeyboardFrameEndUserInfoKey
    • view.convert
    • Notification.Name.UIKeyboardWillHide
    • UIEdgeInsets
    • UITextView.contentInset

Project 17 - Swifty Ninja

• SKShapeNode
• AVAudioPlayer
• UIBezierPath

Project 18 - Debugging

• All about debugging.
  • print()
  • Assert()
  • breakpoints
    • conditional logic
    • break on exception
  • some debugging tooling around UIs
    • Show View Frames
    • Capture View Hierarchy

Project 19 - Capital Cities

• MapKit
• MKMapView
• protocols
• annotations
  • CLLocationCoordinate2D
  • MKAnnotation
  • Customizing annotations
• MKPinAnnotationView
  • canShowCallout()

Project 20 - Fireworks Night

• Timer object
• More SKNode
  • color
  • colorBlendFactor
• SKAction.follow()
• how to detect the device being shaken

Project 21 - Local Notifications

• Not the same thing as Push Notifications
• UNUserNotificationCenter
• DateComponents
• UNMutableNotificationContent
• UNNotificationSound
• UNNotificationAction
• UNNotificationCategory
• UNUserNotificationCenterDelegate
• UNNotificationDefaultActionIdentifier

Project 22 - Detect-a-Beacon

• CLBeaconRegion
• CLLocationManager
• uuidgen
• CLProximity

Project 23 - Per-Pixel Collision Detection

• more SKEmitterNode, SKSpriteNode, and SKLabelNode
• per-pixel collision detection with SKPhysicsBody

Project 24 - Swift Extensions

• just a playground this time.

Project 25 - multipeer connectivity

• MCSession
• MCPeerID
• MCadvertiserAssistant
• MCBrowserViewController
• UIImagePNGRepresentation

Project 26 - Marble Maze

• categoryBitMask
• collisionBitMask
• contactTestBitMask
• linearDamping
• CMMotionManager
• CoreMotion
• Compiler Directives
  • #if
  • #else
  • #endif
• SKPhysicsContactDelegate
  • didBegin()