2020-07-28 10:03:53 +08:00
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---
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title: Each 循环渲染器
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2020-07-29 16:20:21 +08:00
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description:
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2020-07-28 10:03:53 +08:00
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type: 0
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group: ⚙ 组件
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menuName: Each 循环渲染器
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2020-07-29 16:20:21 +08:00
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icon:
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2020-07-28 10:03:53 +08:00
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order: 45
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---
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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="page"
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2020-07-28 10:03:53 +08:00
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{
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2020-11-04 21:58:43 +08:00
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"type": "page",
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"data": {
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"arr": ["A", "B", "C"]
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},
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"body": {
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"type": "each",
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"name": "arr",
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"items": {
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"type": "tpl",
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2020-11-05 10:59:58 +08:00
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"tpl": "<span class='label label-default m-l-sm'><%= data.item %></span> "
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2020-11-04 21:58:43 +08:00
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}
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2020-07-28 10:03:53 +08:00
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}
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}
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```
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2021-01-07 23:35:03 +08:00
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### 如果是对象数组
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如果数组中的数据是对象,可以直接使用 data.xxx 来获取,另外能用 data.index 来获取数组索引,但如果对象本身也有名字为 index 的字段就会覆盖到,获取不到索引了。
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```schema:height="160" scope="page"
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{
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"type": "page",
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"data": {
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"arr": [{"name": "a"}, {"name": "b"}, {"name": "c"}]
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},
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"body": {
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"type": "each",
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"name": "arr",
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"items": {
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"type": "tpl",
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"tpl": "<span class='label label-default m-l-sm'><%= data.name %>:<%= data.index %></span> "
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}
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}
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}
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```
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2020-10-19 09:44:42 +08:00
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## 用作 Field 时
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当用在 Table 的列配置 Column、List 的内容、Card 卡片的内容和表单的 Static-XXX 中时,可以设置`name`属性,映射同名变量,然后用可以通过 `item` 变量获取单项值
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### Table 中的列类型
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-10-19 09:44:42 +08:00
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{
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"type": "table",
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"data": {
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"items": [
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{
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"id": "1",
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"each": ["A1", "B1", "C1"]
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},
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{
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"id": "2",
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"each": ["A2", "B2", "C2"]
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},
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{
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"id": "3",
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2021-05-21 11:03:22 +08:00
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"each": []
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2020-10-19 09:44:42 +08:00
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}
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]
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},
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"columns": [
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{
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"name": "id",
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"label": "Id"
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},
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{
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"name": "each",
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"label": "循环",
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"type": "each",
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2021-05-21 11:03:22 +08:00
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"placeholder": "暂无内容",
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2020-10-19 09:44:42 +08:00
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"items": {
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"type": "tpl",
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2020-11-02 11:15:30 +08:00
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"tpl": "<span class='label label-info m-l-sm'><%= this.item %></span>"
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2020-10-19 09:44:42 +08:00
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}
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}
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]
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}
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```
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List 的内容、Card 卡片的内容配置同上
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### Form 中静态展示
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2021-01-07 23:35:03 +08:00
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```schema: scope="body"
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2020-10-19 09:44:42 +08:00
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{
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"type": "form",
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"data": {
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2020-10-19 10:02:40 +08:00
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"each": ["A", "B", "C"]
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2020-10-19 09:44:42 +08:00
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},
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2021-06-07 10:09:55 +08:00
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"body": [
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2020-10-19 09:44:42 +08:00
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{
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2020-10-19 10:04:52 +08:00
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"type": "each",
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"label": "静态展示each",
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"name": "each",
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"items": {
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"type": "tpl",
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2020-11-02 11:15:30 +08:00
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"tpl": "<span class='label label-info m-l-sm'><%= this.item %></span>"
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2020-10-19 10:04:52 +08:00
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}
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2020-10-19 09:44:42 +08:00
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}
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]
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}
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```
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2021-08-16 18:15:46 +08:00
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## 使用数据映射
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```schema: scope="page"
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{
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"type": "page",
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"data": {
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"arr": ["A", "B", "C"]
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},
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"body": {
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"type": "each",
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"source": "${arr}",
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"items": {
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"type": "tpl",
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"tpl": "<span class='label label-default m-l-sm'><%= data.item %></span> "
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}
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}
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}
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```
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`name` 的优先级会比 `source` 更高
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2020-07-28 10:03:53 +08:00
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## 属性表
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2021-08-16 18:15:46 +08:00
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| 属性名 | 类型 | 默认值 | 说明 |
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| ----------- | -------- | -------- | -------------------------------------------------------------------- |
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| type | `string` | `"each"` | 指定为 Each 组件 |
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| value | `array` | `[]` | 用于循环的值 |
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| name | `string` | | 获取数据域中变量 |
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| source | `string` | | 获取数据域中变量, 支持 [数据映射](../../docs/concepts/data-mapping) |
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| items | `object` | | 使用`value`中的数据,循环输出渲染器。 |
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| placeholder | `string` | | 当 `value` 值不存在或为空数组时的占位文本 |
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