SwiftUI Academy · 课时

线性、径向与角度渐变

使用平滑的颜色过渡填充视图。

线性、径向与角度渐变 是 CoddyKit 上的免费 SwiftUI Academy 课时。这是第 2 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。

What Is a Gradient?

A gradient blends smoothly between two or more colors. It adds depth and polish that a flat fill cannot. 🌈

Gradients Are Views Too

Just like Color, a LinearGradient is a view. You can place it directly or use it to fill a shape or background.

Your First LinearGradient

A LinearGradient flows colors along a straight line. Give it colors plus a start and end point to set the direction.

LinearGradient(
    colors: [.blue, .purple],
    startPoint: .top,
    endPoint: .bottom
)

Choosing Start & End Points

Points like .topLeading and .bottomTrailing aim the gradient diagonally. Swap them to change the angle of the blend.

startPoint: .topLeading
endPoint: .bottomTrailing

More Than Two Colors

Pass several colors and the gradient spreads them evenly across its length. Great for sunset-style backgrounds.

LinearGradient(
    colors: [.orange, .pink, .purple],
    startPoint: .leading,
    endPoint: .trailing
)

RadialGradient Glows Outward

A RadialGradient radiates from a center point outward in a circle. It is perfect for spotlights and soft glows.

RadialGradient(
    colors: [.yellow, .red],
    center: .center,
    startRadius: 5,
    endRadius: 120
)

Tuning the Radius

The startRadius and endRadius control how tight or wide the glow spreads. Bigger gaps mean smoother, slower fades.

AngularGradient Sweeps Around

An AngularGradient wraps colors around a center, like a color wheel. It creates a cool conical, swirling effect.

AngularGradient(
    colors: [.red, .green, .blue, .red],
    center: .center
)

Gradient as a Background

Attach a gradient with the background modifier to brighten any view behind your content. Instant visual lift.

Text("Hi")
    .padding()
    .background(LinearGradient(
        colors: [.blue, .cyan],
        startPoint: .top, endPoint: .bottom))

Shorthand Gradients

For a quick blend, call .gradient on any color. SwiftUI builds a subtle top-to-bottom gradient for you instantly.

Circle()
    .fill(Color.blue.gradient)

Pick the Right Gradient

Use linear for directional fades, radial for glows, and angular for wheels. Each gives a different mood to your UI. 🎨

Quick Check

Which gradient sweeps its colors around a center point?

Recap: Gradients

You now blend colors three ways: linear along a line, radial from a center, and angular around a wheel. Beautiful work!

常见问题解答

「线性、径向与角度渐变」课时是免费的吗？

是的 — 「线性、径向与角度渐变」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。

「线性、径向与角度渐变」这节课中我会学到什么？

使用平滑的颜色过渡填充视图。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 2 节课，共 4 节。

「线性、径向与角度渐变」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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