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---
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category: Components
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subtitle: 开关
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type: Data Entry
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title: Switch
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---
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开关选择器。
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## 何时使用
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- 需要表示开关状态/两种状态之间的切换时；
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- 和 `checkbox`的区别是，切换 `switch` 会直接触发状态改变，而 `checkbox` 一般用于状态标记，需要和提交操作配合。
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## API
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| allowClear | 支持清除, 单选模式有效 | boolean | false |
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| checked | 指定当前是否选中 | boolean | false |
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| checkedChildren | 选中时的内容 | string\|ReactNode | |
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| defaultChecked | 初始是否选中 | boolean | false |
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| size | 开关大小，可选值：`default` `small` | string | default |
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| unCheckedChildren | 非选中时的内容 | string\|ReactNode | |
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| onChange | 变化时回调函数 | Function(checked:Boolean) | |
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| loading | 加载中的开关 | boolean | false |
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## 方法
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| 名称 | 描述 |
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| ---- | ----------- |
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| focus() | 获取焦点 |
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| blur() | 移除焦点 |
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