--- title: Tree 树形选择框 description: type: 0 group: null menuName: Tree 树形选择框 icon: order: 59 --- ## 基本使用 配置的`options`中，可以通过`children`字段进行嵌套展示，实现树形选择器 ```schema:height="400" scope="body" { "type": "form", "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree", "name": "tree", "label": "Tree", "options": [ { "label": "Folder A", "value": 1, "children": [ { "label": "file A", "value": 2 }, { "label": "file B", "value": 3 } ] }, { "label": "file C", "value": 4 }, { "label": "file D", "value": 5 } ] } ] } ``` ## 选择器样式 配置`"type": "tree-select"`可以实现选择器样式 ```schema:height="400" scope="body" { "type": "form", "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree-select", "name": "tree", "label": "Tree", "options": [ { "label": "Folder A", "value": 1, "children": [ { "label": "file A", "value": 2 }, { "label": "file B", "value": 3 } ] }, { "label": "file C", "value": 4 }, { "label": "file D", "value": 5 } ] } ] } ``` ## 选中父节点是否自动选中子节点 默认选中父节点会自动选中子节点，可以设置`"cascade": true`，不自动选中子节点 ```schema:height="800" scope="body" { "type": "form", "debug": true, "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree", "name": "tree1", "label": "默认自动选中子节点", "multiple": true, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] }, { "type": "divider" }, { "type": "tree", "name": "tree2", "label": "不自动选中子节点", "multiple": true, "cascade": true, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] } ] } ``` ## 选中父节点，值是否包含子节点 默认选中父节点，是不会带上子节点的值，想要自动带上子节点的值，那么配置`"withChildren": true` ```schema:height="800" scope="body" { "type": "form", "debug": true, "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree", "name": "tree1", "label": "默认不自动带上子节点的值", "multiple": true, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] }, { "type": "divider" }, { "type": "tree", "name": "tree2", "label": "自动带上子节点的值", "multiple": true, "withChildren": true, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] } ] } ``` 也可以设置`onlyChildren`，实现只包含子节点的值 ```schema:height="800" scope="body" { "type": "form", "debug": true, "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree", "name": "tree1", "label": "默认不自动带上子节点的值", "multiple": true, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] }, { "type": "divider" }, { "type": "tree", "name": "tree2", "label": "只包含子节点的值", "multiple": true, "onlyChildren": true, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] } ] } ``` ## 默认展开 默认是展开所有子节点的，如果不想默认展开，则配置`"initiallyOpen": false` ```schema:height="500" scope="body" { "type": "form", "debug": true, "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree", "name": "tree1", "label": "默认不自动带上子节点的值", "initiallyOpen": false, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2" }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] } ] } ``` 如果层级较多，也可以配置`unfoldedLevel`指定展开的层级数。 下例中设置`"unfoldedLevel": 1`，默认展开第 1 层 ```schema:height="500" scope="body" { "type": "form", "debug": true, "api": "https://houtai.baidu.com/api/mock2/form/saveForm", "controls": [ { "type": "tree", "name": "tree1", "label": "默认不自动带上子节点的值", "initiallyOpen": false, "unfoldedLevel": 1, "options": [ { "label": "A", "value": "a" }, { "label": "B", "value": "b", "children": [ { "label": "B-1", "value": "b-1" }, { "label": "B-2", "value": "b-2", "children": [ { "label": "B-2-1", "value": "b-2-1" }, { "label": "B-2-2", "value": "b-2-2" }, { "label": "B-2-3", "value": "b-2-3" } ] }, { "label": "B-3", "value": "b-3" } ] }, { "label": "C", "value": "c" } ] } ] } ``` ## 属性表 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 | 属性名 | 类型 | 默认值 | 说明 | | ------------- | ------------------------------------ | ---------------- | ------------------------------------------------------------------------------------------------------------------- | | options | `Array`或`Array` | | [选项组](./options#%E9%9D%99%E6%80%81%E9%80%89%E9%A1%B9%E7%BB%84-options) | | source | `string`或 [API](../../../types/api) | | [动态选项组](./options#%E5%8A%A8%E6%80%81%E9%80%89%E9%A1%B9%E7%BB%84-source) | | autoComplete | [API](../../../types/api) | | [自动提示补全](./options#%E8%87%AA%E5%8A%A8%E8%A1%A5%E5%85%A8-autocomplete) | | multiple | `boolean` | `false` | 是否多选 | | delimeter | `string` | `false` | [拼接符](./options#%E6%8B%BC%E6%8E%A5%E7%AC%A6-delimiter) | | labelField | `string` | `"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) | | valueField | `string` | `"value"` | [选项值字段](./options#%E9%80%89%E9%A1%B9%E5%80%BC%E5%AD%97%E6%AE%B5-valuefield) | | joinValues | `boolean` | `true` | [拼接值](./options#%E6%8B%BC%E6%8E%A5%E5%80%BC-joinvalues) | | extractValue | `boolean` | `false` | [提取值](./options#%E6%8F%90%E5%8F%96%E5%A4%9A%E9%80%89%E5%80%BC-extractvalue) | | creatable | `boolean` | `false` | [新增选项](./options#%E5%89%8D%E7%AB%AF%E6%96%B0%E5%A2%9E-creatable) | | addControls | Array<[表单项](./formitem)> | | [自定义新增表单项](./options#%E8%87%AA%E5%AE%9A%E4%B9%89%E6%96%B0%E5%A2%9E%E8%A1%A8%E5%8D%95%E9%A1%B9-addcontrols) | | addApi | [API](../../types/api) | | [配置新增选项接口](./options#%E9%85%8D%E7%BD%AE%E6%96%B0%E5%A2%9E%E6%8E%A5%E5%8F%A3-addapi) | | editable | `boolean` | `false` | [编辑选项](./options#%E5%89%8D%E7%AB%AF%E7%BC%96%E8%BE%91-editable) | | editControls | Array<[表单项](./formitem)> | | [自定义编辑表单项](./options#%E8%87%AA%E5%AE%9A%E4%B9%89%E7%BC%96%E8%BE%91%E8%A1%A8%E5%8D%95%E9%A1%B9-editcontrols) | | editApi | [API](../../types/api) | | [配置编辑选项接口](./options#%E9%85%8D%E7%BD%AE%E7%BC%96%E8%BE%91%E6%8E%A5%E5%8F%A3-editapi) | | removable | `boolean` | `false` | [删除选项](./options#%E5%88%A0%E9%99%A4%E9%80%89%E9%A1%B9) | | deleteApi | [API](../../types/api) | | [配置删除选项接口](./options#%E9%85%8D%E7%BD%AE%E5%88%A0%E9%99%A4%E6%8E%A5%E5%8F%A3-deleteapi) | | hideRoot | `boolean` | `true` | 如果想要显示个顶级节点，请设置为 `false` | | rootLabel | `boolean` | `"顶级"` | 当 `hideRoot` 不为 `false` 时有用，用来设置顶级节点的文字。 | | showIcon | `boolean` | `true` | 是否显示图标 | | showRadio | `boolean` | `false` | 是否显示单选按钮，`multiple` 为 `false` 是有效。 | | initiallyOpen | `boolean` | `true` | 设置是否默认展开所有层级。 | | unfoldedLevel | `number` | `0` | 设置默认展开的级数，只有`initiallyOpen`不是`true`时生效。 | | cascade | `boolean` | `false` | 当选中父节点时不自动选择子节点。 | | withChildren | `boolean` | `false` | 选中父节点时，值里面将包含子节点的值，否则只会保留父节点的值。 | | onlyChildren | `boolean` | `false` | 多选时，选中父节点时，是否只将其子节点加入到值中。 | | rootCreatable | `boolean` | `false` | 是否可以创建顶级节点 | | rootCreateTip | `string` | `"添加一级节点"` | 创建顶级节点的悬浮提示 | | minLength | `number` | | 最少选中的节点数 | | maxLength | `number` | | 最多选中的节点数 |