SwiftUI Bites — State Management

This repository contains a small demo app that showcases SwiftUI state property wrappers in action.

It is designed as a companion project to the blog post “SwiftUI Bites #01 – State Management” and focuses on ownership, scope, and data flow, not on app architecture or frameworks.

👉 Blog post:
https://jochen-holzer.de/swiftui-bites-01-state-management-property-wrappers-when-to-use-what

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🧠 What this project demonstrates

The app demonstrates the five most important SwiftUI state property wrappers:

• @State
• @Binding
• @StateObject
• @ObservedObject
• @EnvironmentObject

Each concept is shown in isolation and in combination, with inline comments explaining why a specific wrapper is used.

This is not a production app — it’s a learning playground.

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🧭 SwiftUI State Decision Model

The demo follows the same decision model described in the blog article.

flowchart TD
    A["Is the state app-wide?"] -->|Yes| EO["@EnvironmentObject"]
    A -->|No| B{"Value type or ObservableObject?"}

    B -->|Value type| S["@State"]
    B -->|ObservableObject| C{"Who creates the object?"}

    C -->|This view| SO["@StateObject"]
    C -->|Parent / external| OO["@ObservedObject"]

    S --> D{"Does a child view need write access?"}
    D -->|Yes| BI["@Binding (in child view)"]

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