Book Image

An iOS Developer's Guide to SwiftUI

By : Michele Fadda
Book Image

An iOS Developer's Guide to SwiftUI

By: Michele Fadda

Overview of this book

– SwiftUI transforms Apple Platform app development with intuitive Swift code for seamless UI design. – Explore SwiftUI's declarative programming: define what the app should look like and do, while the OS handles the heavy lifting. – Hands-on approach covers SwiftUI fundamentals and often-omitted parts in introductory guides. – Progress from creating views and modifiers to intricate, responsive UIs and advanced techniques for complex apps. – Focus on new features in asynchronous programming and architecture patterns for efficient, modern app design. – Learn UIKit and SwiftUI integration, plus how to run tests for SwiftUI applications. – Gain confidence to harness SwiftUI's full potential for building professional-grade apps across Apple devices.
Table of Contents (25 chapters)
Free Chapter
1
Part 1: Simple Views
5
Part 2: Scrollable Views
8
Part 3: SwiftUI Navigation
11
Part 4: Graphics and Animation
14
Part 5: App Architecture
17
Part 6: Beyond Basics

Understanding relationships in SwiftData

Creating relationships between @Model classes in Swift, particularly when dealing with complex data models and SwiftUI, involves various techniques. These techniques mirror the types of relationships commonly found in databases and data modeling. Let’s take a look at the different ways to create relationships in @Model classes.

One-to-one relationships

Use a property to store the related model’s identifier or directly store an instance of the related model. A one-to-one relationship maps one object to a single instance of a related one, and you are not supposed to have multiple instances of the second object associated with the first one.

Let’s look at an example of a one-to-one relationship:

class UserProfile: ObservableObject {
      @Published var userId: UUID
      // Other properties
}
class User: ObservableObject {
     ...