SwiftUI Academy · 课时

背景与圆角

应用颜色、渐变和圆角。

背景与圆角 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。

Adding a Background

The background modifier paints behind a view. Drop in a color and the area the view occupies fills in, instantly turning plain text into a tile.

Text("Hello")
    .background(.blue)

Pad First, Then Color

A background hugs the content tightly. Add padding before the background so the color has comfortable space around the text inside.

Text("Pill")
    .padding()
    .background(.blue)

Readable Text on Color

Dark backgrounds need light text. Pair a colored background with foregroundStyle so your label stays crisp and easy to read.

Text("Tag")
    .padding()
    .background(.indigo)
    .foregroundStyle(.white)

Rounding the Corners

Sharp corners can feel harsh. The cornerRadius modifier softens them, clipping the view into a friendly rounded rectangle.

Text("Soft")
    .padding()
    .background(.blue)
    .cornerRadius(12)

Order Makes the Shape

Corner radius rounds whatever it follows, so place it after the background. Rounding before the color would clip the text, not the tile.

Background with a Shape

For more control, pass a shape to background. A RoundedRectangle fills and rounds in one step, the modern way to build cards.

Text("Card")
    .padding()
    .background(RoundedRectangle(cornerRadius: 16).fill(.teal))

Making a Circle

A large radius on a square view yields a circle. Combine an equal frame with clipShape using Circle for round avatars and icon badges.

Text("A")
    .frame(width: 60, height: 60)
    .background(.orange)
    .clipShape(Circle())

Gradients as Backgrounds

Backgrounds are not limited to flat colors. A LinearGradient adds depth, flowing smoothly from one color to another across the view.

Text("Glow")
    .padding()
    .background(LinearGradient(colors: [.pink, .orange], startPoint: .top, endPoint: .bottom))

Materials for Depth

SwiftUI ships translucent Material backgrounds that blur whatever sits behind them, giving cards a native, frosted-glass feel.

Text("Frosted")
    .padding()
    .background(.ultraThinMaterial)

Adding a Border

Pair a background with an overlay stroke to outline a card. The rounded rectangle border traces the same corners as the fill.

Text("Bordered")
    .padding()
    .overlay(RoundedRectangle(cornerRadius: 12).stroke(.gray))

Building a Real Card

Stack these tools and a card appears: padding for room, a background for color, and a corner radius to round it into a polished tile.

Text("Done")
    .padding()
    .background(.green)
    .cornerRadius(10)

Quick Check

Make sure the modifier order clicked for you.

Recap

Awesome! You can now style views with a background, round corners, add gradients, materials, and borders to build clean, reusable cards.

常见问题解答

「背景与圆角」课时是免费的吗？

是的 — 「背景与圆角」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。

「背景与圆角」这节课中我会学到什么？

应用颜色、渐变和圆角。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。

「背景与圆角」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。

此课程中的所有课时

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