SwiftUI Academy · 课时

VoiceOver 与辅助功能标签

为辅助技术描述控件。

VoiceOver 与辅助功能标签 是 CoddyKit 上的免费 SwiftUI Academy 课时。这是第 1 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 VoiceOver?

VoiceOver is Apple's screen reader. It speaks your interface aloud so people who can't see the screen can still use your app. 🔊

SwiftUI Helps You

The good news: SwiftUI auto-generates accessibility for standard views. A Text already reads its content, so you start ahead.

When Labels Go Missing

An icon-only button has no readable text, so VoiceOver may say nothing useful. That's when you add an explicit accessibility label.

Button(action: save) {
    Image(systemName: "square.and.arrow.down")
}

Adding a Label

Attach accessibilityLabel to describe what a control does in plain words, not how it looks.

Button(action: save) {
    Image(systemName: "square.and.arrow.down")
}
.accessibilityLabel("Save")

Label, Not Appearance

Write the label as the user's goal. Say Save, not "down arrow icon". The label is meaning, never decoration.

Adding Hints

An accessibilityHint tells the user what happens after they act. It is read after the label, with a short pause.

.accessibilityLabel("Save")
.accessibilityHint("Saves your note to the list")

Reading the Value

For controls that hold data, accessibilityValue announces the current state, like a slider reading "70 percent".

Slider(value: $level)
    .accessibilityValue("\(Int(level)) percent")

Grouping Elements

Use accessibilityElement(children:) to merge a card's pieces into one swipe, so VoiceOver reads it as a single unit.

VStack { Text(name); Text(role) }
.accessibilityElement(children: .combine)

Marking Roles with Traits

Add accessibilityAddTraits so VoiceOver announces a view's role, like calling a tappable card a button.

.accessibilityAddTraits(.isButton)

Hiding Decoration

Purely decorative images add noise. Use accessibilityHidden(true) to skip them so VoiceOver focuses on what matters.

Image("sparkle")
    .accessibilityHidden(true)

Test It Yourself

Turn on VoiceOver in the Accessibility settings and swipe through your app. Hearing it is the fastest way to spot gaps.

Quick Check

You have an icon-only button. Which modifier gives VoiceOver a readable name?

Recap

You learned to make controls speak: add an accessibilityLabel for icons, hints for outcomes, and group or hide views so VoiceOver flows clearly. ✨

常见问题解答

「VoiceOver 与辅助功能标签」课时是免费的吗？

是的 — 「VoiceOver 与辅助功能标签」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。

「VoiceOver 与辅助功能标签」这节课中我会学到什么？

为辅助技术描述控件。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 1 节课，共 4 节。

「VoiceOver 与辅助功能标签」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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