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Swift Academy · Lesson

LazyVGrid and LazyHGrid

Building responsive grid layouts with GridItem fixed, flexible and adaptive columns.

LazyVGrid and LazyHGrid is a free Swift Academy lesson on CoddyKit — lesson 2 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Swift Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Welcome

`LazyVGrid` and `LazyHGrid` provide grid layouts with customisable column or row definitions using `GridItem`. They're perfect for galleries, catalogues, and card layouts.

GridItem Types

• `.fixed(size)` — fixed pixel size • `.flexible(min:max:)` — fills available space • `.adaptive(minimum:maximum:)` — as many columns as fit

Basic LazyVGrid

```swift let columns = [GridItem(.adaptive(minimum: 100))] LazyVGrid(columns: columns, spacing: 16) { ForEach(items) { item in ItemCard(item: item) } } ```

Fixed Columns

```swift let cols = Array(repeating: GridItem(.fixed(120)), count: 3) LazyVGrid(columns: cols) { ForEach(0..<12) { i in Color.blue.frame(height:80) } } ```

Mixed GridItem Types

```swift let cols = [GridItem(.flexible(minimum:80)), GridItem(.fixed(100))] ``` Combine types for Pinterest-style layouts.

LazyHGrid

```swift let rows = [GridItem(.fixed(60)), GridItem(.fixed(60))] ScrollView(.horizontal) { LazyHGrid(rows: rows, spacing: 8) { ForEach(tags) { tag in TagView(tag: tag) } } } ```

alignment and spacing

```swift LazyVGrid(columns: columns, alignment: .leading, spacing: 12) { ... } ```

Section Headers in Grid

```swift LazyVGrid(columns: columns, pinnedViews: .sectionHeaders) { Section(header: Text("Section 1").font(.headline)) { ForEach(items1) { ItemView($0) } } } ```

Adaptive vs Fixed Decision

• `.adaptive` — best for photo grids and dynamic content • `.fixed` — when exact control is needed • `.flexible` — fills evenly, like a CSS flexbox column

Lazy Loading Performance

`Lazy` prefix means only visible cells are rendered — crucial for long lists. Without lazy, all items are created upfront.

Quick Check

Which `GridItem` type creates as many columns as can fit a minimum width?

Recap

Key takeaways: • `LazyVGrid(columns:)` / `LazyHGrid(rows:)` for grid layouts • `GridItem(.fixed)`, `.flexible()`, `.adaptive(minimum:)` • `pinnedViews: .sectionHeaders` for sticky headers • Lazy = only visible cells rendered • `.adaptive` is the easiest for responsive grids Next: Spacer, padding, and frame.

Frequently asked questions

Is the “LazyVGrid and LazyHGrid” lesson free?

Yes — the full text of “LazyVGrid and LazyHGrid” is free to read here on the web, and the Swift Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Swift Academy course, upgrade to CoddyKit PRO.

What will I learn in “LazyVGrid and LazyHGrid”?

Building responsive grid layouts with GridItem fixed, flexible and adaptive columns. You practise Swift Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start Swift Academy?

No prior experience is required. Swift Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 2 of 4, so you can start here or from the beginning and move at your own pace.

How long does the “LazyVGrid and LazyHGrid” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this Swift Academy lesson?

Yes. Every Swift Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. VStack, HStack and ZStack Fundamentals
  2. LazyVGrid and LazyHGrid
  3. Spacer, Padding and Frame Modifiers
  4. GeometryReader for Adaptive Layouts
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