2020-09-02 15:30:16 +08:00
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---
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title: Radios 单选框
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description:
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type: 0
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group: null
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menuName: Radios 单选框
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icon:
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order: 36
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---
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2021-01-07 23:35:03 +08:00
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用于实现单选。
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2020-09-02 15:30:16 +08:00
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## 基本用法
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-09-02 15:30:16 +08:00
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{
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"type": "form",
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2021-06-07 10:09:55 +08:00
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"body": [
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2020-09-02 15:30:16 +08:00
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{
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"name": "radios",
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"type": "radios",
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"label": "radios",
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"options": [
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{
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"label": "OptionA",
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"value": "a"
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},
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{
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"label": "OptionB",
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"value": "b"
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},
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{
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"label": "OptionC",
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"value": "c"
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},
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{
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"label": "OptionD",
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"value": "d"
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}
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]
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}
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]
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}
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```
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2021-04-08 23:19:23 +08:00
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## 列显示
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2021-04-03 00:17:51 +08:00
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2021-04-08 23:19:23 +08:00
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设置 `inline` 可以纵向显示,用于显示列很多的情况
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2021-04-03 00:17:51 +08:00
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```schema: scope="body"
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{
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"type": "form",
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2021-06-07 10:09:55 +08:00
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"body": [
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2021-04-03 00:17:51 +08:00
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{
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"name": "radios",
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"type": "radios",
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"label": "radios",
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2021-04-08 23:19:23 +08:00
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"inline": false,
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"options": [
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{
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"label": "OptionA",
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"value": "a"
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},
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{
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"label": "OptionB",
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"value": "b"
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},
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{
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"label": "OptionC",
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"value": "c"
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},
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{
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"label": "OptionD",
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"value": "d"
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}
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]
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}
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]
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}
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```
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## 控制列显示的分裂
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通过 columnsCount 来设置列显示的列数,比如下面例子是两列。
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```schema: scope="body"
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{
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"type": "form",
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2021-06-07 10:09:55 +08:00
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"body": [
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2021-04-08 23:19:23 +08:00
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{
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"name": "radios",
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"type": "radios",
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"label": "radios",
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"inline": false,
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"columnsCount": 2,
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2021-04-03 00:17:51 +08:00
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"options": [
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{
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"label": "OptionA",
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"value": "a"
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},
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{
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"label": "OptionB",
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"value": "b"
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},
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{
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"label": "OptionC",
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"value": "c"
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},
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{
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"label": "OptionD",
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"value": "d"
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}
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]
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}
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]
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}
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```
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2022-04-24 10:46:23 +08:00
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## 默认选择第一个
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通过 `selectFirst` 属性配置
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```schema: scope="body"
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{
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"type": "form",
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"body": [
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{
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"name": "radios",
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"type": "radios",
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"label": "radios",
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"selectFirst": true,
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"options": [
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{
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"label": "OptionA",
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"value": "a"
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},
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{
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"label": "OptionB",
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"value": "b"
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},
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{
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"label": "OptionC",
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"value": "c"
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},
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{
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"label": "OptionD",
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"value": "d"
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}
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]
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}
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]
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}
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```
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## 动态选项
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可以配置 `source` 来从上下文或远程 api 拉取选项数据
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```schema: scope="body"
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{
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"type": "page",
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"body": {
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"type": "form",
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"data": {
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"items": [
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{
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"label": "A",
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"value": "a"
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},
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{
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"label": "B",
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"value": "b"
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},
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{
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"label": "C",
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"value": "c"
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}
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]
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},
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"body": [
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{
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"label": "选项",
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"type": "radios",
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"name": "radios",
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"source": "${items}"
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}
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]
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}
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}
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```
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远程 api
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```schema: scope="body"
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{
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"type": "page",
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"body": {
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"type": "form",
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"body": [
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{
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"label": "选项",
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"type": "radios",
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"name": "radios",
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"source": "/api/mock2/form/getOptions?waitSeconds=1"
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}
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]
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}
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}
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```
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api 返回内容需要包含 options 字段
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```json
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{
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"status": 0,
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"msg": "",
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"data": {
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"value": "b", // 可选,如果返回就会自动选中 b 选项
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// 必须用 options 作为选项组的 key 值
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"options": [
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{
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"label": "A",
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"value": "a"
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},
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{
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"label": "B",
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"value": "b"
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},
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{
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"label": "C",
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"value": "c"
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}
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]
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}
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}
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```
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2020-09-02 15:30:16 +08:00
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## 属性表
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当做选择器表单项使用时,除了支持 [普通表单项属性表](./formitem#%E5%B1%9E%E6%80%A7%E8%A1%A8) 中的配置以外,还支持下面一些配置
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2021-02-01 20:44:49 +08:00
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| 属性名 | 类型 | 默认值 | 说明 |
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| ------------ | ----------------------------------------- | --------- | ------------------------------------------------------------------------------------------- |
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| options | `Array<object>`或`Array<string>` | | [选项组](./options#%E9%9D%99%E6%80%81%E9%80%89%E9%A1%B9%E7%BB%84-options) |
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| source | `string`或 [API](../../../docs/types/api) | | [动态选项组](./options#%E5%8A%A8%E6%80%81%E9%80%89%E9%A1%B9%E7%BB%84-source) |
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| labelField | `boolean` | `"label"` | [选项标签字段](./options#%E9%80%89%E9%A1%B9%E6%A0%87%E7%AD%BE%E5%AD%97%E6%AE%B5-labelfield) |
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| valueField | `boolean` | `"value"` | [选项值字段](./options#%E9%80%89%E9%A1%B9%E5%80%BC%E5%AD%97%E6%AE%B5-valuefield) |
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| columnsCount | `number` | `1` | 选项按几列显示,默认为一列 |
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| inline | `boolean` | `true` | 是否显示为一行 |
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| selectFirst | `boolean` | `false` | 是否默认选中第一个 |
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| autoFill | `object` | | [自动填充](./options#%E8%87%AA%E5%8A%A8%E5%A1%AB%E5%85%85-autofill) |
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2022-03-16 10:12:21 +08:00
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## 事件表
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2022-04-24 10:46:23 +08:00
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| 事件名称 | 事件参数 | 说明 |
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| -------- | -------------------------------- | -------------------- |
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| change | `value: string \| Option` 选中值 | 选中值发生变化时触发 |
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2022-03-16 10:12:21 +08:00
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## 动作表
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2022-04-24 10:46:23 +08:00
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| 动作名称 | 动作配置 | 说明 |
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| -------- | -------- | ---- |
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| clear | - | 清空 |
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| reset | - | 重置 |
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