Available from Gumroad
"The Mystery of the Mutating Mannequin" is a fun fast-moving tour of the different techniques of flowing data through your SwiftUI app.
We start with the simplest of views that contains no state, to those that use simple properties, @State properties, or share state using @Binding. Throughout this journey through things you thought you knew, we use various tools to see which views are redrawn when and why.
Next, we manage and persist an object graph manually or go old school with Core Data on your way to learning about the future when we work with SwiftData.
Updated for Xcode 15 and Swift 5.9 and tested on Apple Silicon.
Chapter 1: Simple Views
Through the Window Display
We Begin
Modifiers
Composition
Road Map
Credits
Chapter 2: View Identity
A Simple Model
Stored Properties
State and Memory
State and Identity
Changing State
Adding a Conditional
Identity
Chapter 3: Sharing State
Binding
Introducing Journey
More Bindings
ObservableObject
Environment
AsyncSequence
Observable
Bindable
Binding and Bindable
Chapter 4: Saving our Work
Multiple Journeys
Persistence
Amuse Bouche
The Stack
The Managed Object Model
Core Data Relationships
Custom Classes
Full Circle-ish and Beyond
Chapter 5: SwiftData
Stubbing out the Model
The Model Macro
SwiftData Relationships
The SwiftData Stack
Queries
Adding and Deleting
Updating
Severing Relationships
DataFlow in SwiftUI Training from Dim Sum Thinking
