Function getTreeCheckNodes

getTreeCheckNodes(treeData, checkedKeys, halfCheckedKeys?, fieldNames?): {
    checkedNodes: never[];
    halfCheckedNodes: never[];
    nodeArr: never[];
    nodeMap: Map<any, any>;
    nodeObj: {};
    parentMap: Map<any, any>;
} | {
    checkedNodes: string[];
    halfCheckedNodes: string[];
    nodeArr: any[];
    nodeMap: Map<string, any>;
    nodeObj: Record<string, any>;
    parentMap: Map<string, string>;
}
主动获取树的半选/全选节点
Parameters
- treeData: any[]
  树值
- checkedKeys: string[]
  已经全选的节点
- halfCheckedKeys: string[] = []
  已经半选的节点
- fieldNames: {
  children?: string;
  key?: string;
  } = ...
  自定义字段名
  - Optionalchildren?: string
  - Optionalkey?: string
Returns {
    checkedNodes: never[];
    halfCheckedNodes: never[];
    nodeArr: never[];
    nodeMap: Map<any, any>;
    nodeObj: {};
    parentMap: Map<any, any>;
} | {
    checkedNodes: string[];
    halfCheckedNodes: string[];
    nodeArr: any[];
    nodeMap: Map<string, any>;
    nodeObj: Record<string, any>;
    parentMap: Map<string, string>;
}
Example
```
getTreeCheckNodes(treeData, ['0-0', '0-1']); /// ...
getTreeCheckNodes(treeData, ['0-0', '0-1'], ['0']); /// ...
getTreeCheckNodes(treeData, ['0-0', '0-1'], ['0'], { key: 'id' }); /// 使用 id 作为唯一标识
```