小编kva*_*aaz的帖子

它适用于第一次点击，但是当我再次点击它取消选择它时，它显示了我的错误：

state.selectedStudents.includes 不是函数。（在 'state.selectedStudents.includes(action.item)' 中，'state.selectedStudents.includes' 未定义）

import {
  SELECT
} from "../actions/postActionTypes";

const initialState = {
  students: ['Aditya', 'Rohan', 'Hello'],
  selectedStudents: []
}

const selectReducer = (state = initialState, action) => {


  switch (action.type) {
    case SELECT:
      return {
        ...state,
        selectedStudents: state.selectedStudents.includes(action.item) ? state.selectedStudents.splice(state.selectedStudents.indexOf(action.item), 1) : state.selectedStudents.push(action.item)
      }
      default:
        return state;
  }

}

export default selectReducer;

我试过做

var photo = {
    uri: uriFromCameraRoll,
    type: 'image/jpeg',
    name: 'photo.jpg',
};

并使用

公理

var body = new FormData();
body.append('authToken', 'secret');
body.append('photo', photo);
body.append('title', 'A beautiful photo!');

const config = {
            headers: {
                'content-Type': 'multipart/form-data'
            }
        }
 MY_API().then(instance => {

// it is axios instance
            instance.post("/api/v1/upload",
                { body }
                , config).then(res => {
                    console.log(JSON.stringify(res));

                }).catch(err => {
                    console.log(err);
                })
        }
        )

在删除配置我得到

错误 503

并通过配置它给出

错误：多部分：未找到边界

并且与 POSTMAN 一起工作也很好......连同标题

我也尝试上传 File (blob) ，但同样的错误

错误：多部分：未找到边界

 dataURLtoFile(dataurl, filename) {
    var arr = …