TreeSelect 树形选择器

基本使用

```schema: scope=”body” { “type”: “form”, “api”: “/api/mock2/form/saveForm”, “body”: [ { “type”: “tree-select”, “name”: “tree”, “label”: “Tree”, “searchable”: true, “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 }, { “label”: “Folder E”, “children”: [ { “label”: “Folder G”, “children”: [ { “label”: “file H”, “value”: 6 }, { “label”: “file I”, “value”: 7 } ] } ] } ] } ] }

## 仅展示选中节点文本信息
设置`hideNodePathLabel: true`，可以隐藏选择框中已选择节点的祖先节点（ancestor）的`labelField`字段值，仅展示当前选中节点的`labelField`字段值。
```schema: scope="body"
{
  "type": "form",
  "api": "/api/mock2/form/saveForm",
  "body": [
    {
      "type": "tree-select",
      "name": "tree1",
      "label": "展示已选择节点的祖先节点的文本信息",
      "value": "1,6,7",
      "multiple": true,
      "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
        },
        {
          "label": "Folder E",
          "children": [
            {
              "label": "Folder G",
              "children": [
                {
                  "label": "file H",
                  "value": 6
                },
                {
                  "label": "file I",
                  "value": 7
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "type": "divider"
    },
    {
      "type": "tree-select",
      "name": "tree2",
      "label": "仅展示已选择节点的文本信息",
      "value": "1,6,7",
      "multiple": true,
      "hideNodePathLabel": true,
      "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
        },
        {
          "label": "Folder E",
          "children": [
            {
              "label": "Folder G",
              "children": [
                {
                  "label": "file H",
                  "value": 6
                },
                {
                  "label": "file I",
                  "value": 7
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}

只允许选择叶子节点

1.8.0 及以上版本

在单选时，可通过 onlyLeaf 可以配置只允许选择叶子节点

```schema: scope=”body” { “type”: “form”, “api”: “/api/mock2/form/saveForm”, “body”: [ { “type”: “tree-select”, “name”: “tree”, “label”: “Tree”, “onlyLeaf”: true, “searchable”: true, “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 }, { “label”: “Folder E”, “value”: “61”, “children”: [ { “label”: “Folder G”, “value”: “62”, “children”: [ { “label”: “file H”, “value”: 6 }, { “label”: “file I”, “value”: 7 } ] } ] } ] } ] }

## 如何让某些节点无法点？
只需要对应的节点没有 value 就行，比如下面例子的目录节点都无法点，只能点文件节点
```schema: scope="body"
{
  "type": "form",
  "api": "/api/mock2/form/saveForm",
  "body": [
    {
      "type": "tree-select",
      "name": "tree",
      "label": "Tree",
      "searchable": true,
      "options": [
        {
          "label": "Folder A",
          "children": [
            {
              "label": "file A",
              "value": 2
            },
            {
              "label": "file B",
              "value": 3
            }
          ]
        },
        {
          "label": "Folder E",
          "children": [
            {
              "label": "Folder G",
              "children": [
                {
                  "label": "file H",
                  "value": 6
                },
                {
                  "label": "file I",
                  "value": 7
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}

属性表

更多用法，见 InputTree

事件表

当前组件会对外派发以下事件，可以通过onEvent来监听这些事件，并通过actions来配置执行的动作，在actions中可以通过event.data.xxx事件参数变量来获取事件产生的数据，详细请查看事件动作。

动作表

当前组件对外暴露以下特性动作，其他组件可以通过指定actionType: 动作名称、componentId: 该组件id来触发这些动作，动作配置可以通过args: {动作配置项名称: xxx}来配置具体的参数，详细请查看事件动作。