SwiftUI Academy · 课时

使用 LazyVGrid 构建自适应网格

将卡片排列到灵活的网格列中。

使用 LazyVGrid 构建自适应网格 是 CoddyKit 上的免费 SwiftUI Academy 课时。这是第 3 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 SwiftUI Academy 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 SwiftUI Academy 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Why a Grid?

Stacks give you rows or columns, but a LazyVGrid arranges items into neat rows and columns, like a photo album. 🖼️

Define the Columns

A LazyVGrid needs a columns array of GridItem values that describe how many tracks to lay out.

let columns = [GridItem(), GridItem()]
LazyVGrid(columns: columns) {
    ForEach(items) { Cell($0) }
}

Flexible Items

A GridItem(.flexible()) stretches to share space evenly, so two flexible items make two equal columns.

let columns = [
    GridItem(.flexible()),
    GridItem(.flexible())
]

Fixed Width Tracks

Use GridItem(.fixed(80)) when you want a column to stay exactly 80 points wide no matter the screen.

let columns = [GridItem(.fixed(80))]

Truly Adaptive

The magic option is .adaptive(minimum:): it fits as many columns as will fit, adjusting to any screen size.

let columns = [
    GridItem(.adaptive(minimum: 100))
]

Always Inside a Scroll

Wrap your LazyVGrid in a ScrollView so the grid can grow past the screen and load cells lazily.

ScrollView {
    LazyVGrid(columns: columns) {
        ForEach(items) { Cell($0) }
    }
}

Spacing Between Cells

Tune the gaps with a spacing argument on the grid and on each GridItem for tidy, balanced cells.

LazyVGrid(columns: columns, spacing: 16) {
    ForEach(items) { Cell($0) }
}

Cells Are Just Views

Each item in the ForEach becomes a cell, so any view works: an image, a card, or a labeled button.

ForEach(photos) { photo in
    Image(photo.name)
        .resizable()
}

Lazy by Name

Like other lazy containers, LazyVGrid builds cells as they scroll in, so large galleries stay smooth.

Horizontal Cousin

Need columns of fixed rows scrolling sideways? LazyHGrid is the horizontal counterpart with the same GridItem API.

Responsive Layouts

One adaptive grid looks great on a phone and an iPad, since columns reflow automatically to fill the space. ✨

Quick Check

Think about which GridItem reacts to screen size.

Recap

You learned to build flexible, fixed, and adaptive grids with LazyVGrid inside a ScrollView for responsive layouts. 🎉

常见问题解答

「使用 LazyVGrid 构建自适应网格」课时是免费的吗？

是的 — 「使用 LazyVGrid 构建自适应网格」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 SwiftUI Academy 课程的其余内容，请升级到 CoddyKit PRO。 SwiftUI Academy 课程共包含 4 节课。

「使用 LazyVGrid 构建自适应网格」这节课中我会学到什么？

将卡片排列到灵活的网格列中。你通过在浏览器中直接运行的动手代码来练习 SwiftUI Academy，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 SwiftUI Academy 需要有经验吗？

无需任何先前经验。CoddyKit 上的 SwiftUI Academy 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 3 节课，共 4 节。

「使用 LazyVGrid 构建自适应网格」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 SwiftUI Academy 课中编写并运行代码吗？

能。每节 SwiftUI Academy 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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