dispatch(...).then is not a function(已解决)

在使用antd  TreeSelect组件 异步获取数据的时候报错dispatch(...).then is not a function

这个错的原因其实是你请求的方法返回的不是promise对象    

官网是这样写的

  onLoadData = treeNode =>
    new Promise(resolve => {
      const { id } = treeNode.props;
      setTimeout(() => {
        this.setState({
          treeData: this.state.treeData.concat([
            this.genTreeNode(id, false),
            this.genTreeNode(id, true),
          ]),
        });
        resolve();
      }, 300);
    });

和我们习惯的写法不太一样，我是这样写的 注意我是有个return的  没有这个return就会报错

  return new Promise(resolve => {
      setTimeout(() => {
        dispatch({
          type: 'persionalUsermanage/queryOrgChild',
          payload: {
            oid: item.key
          }
        }).then((response:any) => {
          let orgf:any = []
          if (response.result) {
            response.result.map((item:any) => {
              orgf.push({
                title: item.shortname,
                key: item.oid,
              })
            })
            dispatch({
              type:'bSRoleManagement/querySysIdentityBySysId1',
              payload: updateTreeData(roleRangeSelect,item.key,orgf),
            })
          }
        })
        resolve();
      }, 300);
    });