---
title: "Radio 组件 — zenit Zig UI"
description: "从互斥选项中选择唯一值。组内选择、value、name、键盘移动与焦点顺序由组件统一管理。"
url: https://zenit.z.express/zh/components/radio
language: zh-CN
alternate_en: https://zenit.z.express/components/radio.md
alternate_es: https://zenit.z.express/es/components/radio.md
alternate_ja: https://zenit.z.express/ja/components/radio.md
alternate_ko: https://zenit.z.express/ko/components/radio.md
alternate_fr: https://zenit.z.express/fr/components/radio.md
alternate_de: https://zenit.z.express/de/components/radio.md
project: zenit v0.1.0-alpha (Zig 0.15.2, macOS)
source: https://github.com/version-next/zenit
---

# Radio

`ui.widgets.RadioGroup`

从互斥选项中选择唯一值。

[Video](https://zenit.z.express/media/stories/radio.mp4?v=47a6bfed14)

**BEHAVIOR CONTRACT**

组内选择、value、name、键盘移动与焦点顺序由组件统一管理。

**RECORDED INTERACTION**

Harness 选择 Option Y，组内其余项自动取消。

`examples/storybook/stories.zig:433`

```zig
pub fn buildRadio(scope: *ui.Scope, cx: *ui.Cx) anyerror!*ui.Node {
    const a = cx.allocator;
    const c = try col(cx, 16);

    const status = try ui.text(cx, "selected → (none)", .{ .font_size = 13, .color = light.color.fg_secondary });
    status.meta.ownership.meta.test_id = "story.radio.status";
    try c.appendChild(a, status);
    const radio_story = try cx.bindState(RadioStory, .{ .status = status });

    try c.appendChild(a, try label(cx, "Radio"));
    try c.appendChild(a, try W.Radio(.{ .label_text = "Selected", .checked = true, .value = "a", .name = "g" }).mount(scope, cx));
    try c.appendChild(a, try W.Radio(.{ .label_text = "Unselected", .checked = false, .value = "b", .name = "g" }).mount(scope, cx));

    try c.appendChild(a, try label(cx, "RadioGroup"));
    const opts = [_]ui.widgets.checkbox.RadioOption{
        .{ .value = "x", .label_text = "Option X" },
        .{ .value = "y", .label_text = "Option Y" },
        .{ .value = "z", .label_text = "Option Z" },
    };
    const group = try W.RadioGroup(.{
        .options = &opts,
        .value = "x",
        .on_change = ui.Cx.strHandlerFrom(RadioStory, radio_story, RadioStory.onChange),
    }).mount(scope, cx);
    group.meta.ownership.meta.test_id = "story.radio.group";
    try c.appendChild(a, group);
    return c;
}
```

[在 GitHub 查看源码examples/storybook/stories.zig:433](https://github.com/version-next/zenit/blob/HEAD/examples/storybook/stories.zig#L433)

这是 Storybook 中该 story 的原样代码（zenit 5f9add5+wip 2026-09-30）。其中 `W` 即 `ui.widgets`，`col` / `row` / `label` 是 Storybook 内的布局小工具。

### RadioGroupProps

`ui.widgets.RadioGroup`

[src/ui/components/checkbox/mod.zig:378](https://github.com/version-next/zenit/blob/HEAD/src/ui/components/checkbox/mod.zig#L378)

```zig
fn RadioGroup(props: RadioGroupProps) RadioGroupBuilder
```

| 字段 | 类型 | 默认值 | 说明 |
| --- | --- | --- | --- |
| `options` | `[]const RadioOption` | — | — |
| `value` | `?[]const u8` | `null` | — |
| `name` | `[]const u8` | `""` | — |
| `horizontal` | `bool` | `false` | — |
| `disabled` | `bool` | `false` | — |
| `on_change` | `?core.HandlerRef` | `null` | — |
| `state_id` | `?u64` | `null` | — |

### RadioProps

`ui.widgets.Radio`

[src/ui/components/checkbox/mod.zig:286](https://github.com/version-next/zenit/blob/HEAD/src/ui/components/checkbox/mod.zig#L286)

```zig
fn Radio(props: RadioProps) RadioBuilder
```

| 字段 | 类型 | 默认值 | 说明 |
| --- | --- | --- | --- |
| `checked` | `bool` | `false` | — |
| `label_text` | `?[]const u8` | `null` | — |
| `value` | `[]const u8` | `""` | — |
| `name` | `[]const u8` | `""` | — |
| `disabled` | `bool` | `false` | — |
| `on_change` | `?core.HandlerRef` | `null` | — |
| `_skip_interaction` | `bool` | `false` | 跳过内部交互注册（RadioGroup 统一管理时设 true） |

### \*Node

`ui.widgets.RadioGroup`

mount 直接返回 `*Node`，把它 append 到父节点即可。

### \*Node

`ui.widgets.Radio`

mount 直接返回 `*Node`，把它 append 到父节点即可。