Axios(在 Reactnative 中)不在 localhost 中调用服务器

我正在构建一个非常简单的api和react-native 应用程序.服务器运行良好(通过PostMan测试)，但应用程序不调用服务器.当axios必须发送post请求时，它会阻塞(见下文).

我绝望了:-(在里面浪费了太多时间.请，如果你能帮我的话...

这是我的代码登录页面.它向动作创建者(与redux合作)发送邮箱和密码:

...
const LogIn = React.createClass({
  submitLogin() {
    // log in the server
    if (this.props.email !== '' && this.props.psw !== '') {
      if (this.props.valid === true) {
        this.props.dispatch(logIn(this.props.email, this.props.psw));
      } else {
        this.props.dispatch(errorTyping());
      }
    }
  },
...

邮箱和密码将被检索并发送给操作创建者:

import axios from 'axios';
import { SIGNIN_URL, SIGNUP_URL } from '../api';
// import { addAlert } from './alerts';
exports.logIn = (email, password) => {
  return function (dispatch) {    
    console.log(email);
    console.log(password);
    console.log(SIGNIN_URL);
    return axios.post(SIGNIN_URL, { email, password })
    .then(
      (response) => {
        console.log(response);
        const { token, userId } = response.data;
        dispatch(authUser(userId));
      }
    )
    .catch(
      (error) => {
        console.log('Could not log in');
      }
    );
  };
};
const authUser = (userId) => {
 return {
 type: 'AUTH_USER',
 userId
 };
};
...

三个控制台.axios之前的log()以正确的方式显示数据.SIGNIN_URL与我在postman中使用的完全相同...但axios不打电话.

这是我的store :

import thunk from 'redux-thunk';
import { createStore, compose, applyMiddleware } from 'redux';
import { AsyncStorage } from 'react-native';
import { persistStore, autoRehydrate } from 'redux-persist';
import reducer from '../reducer';
const defaultState = {};
exports.configureStore = (initialState = defaultState) => {
 const store = createStore(reducer, initialState, compose(
 applyMiddleware(thunk),
 autoRehydrate()
 ));
 persistStore(store, { storage: AsyncStorage });
 return store;
};

调试器中没有错误消息(但axios调用('无法登录')给出的错误消息)

我在windows 10上，有:

"axios": "^0.15.3",
"react": "15.4.2",
"react-native": "0.38.0",
"redux": "^3.6.0"

即使我准备了一个简单的GET呼叫，并且服务器应该返回一条简单的消息(通过postman 和浏览器测试)，呼叫也会失败:

exports.test = () => {
  return function () {
    return axios.get('https://localhost:3000/v1/test')
    .then(
      (response) => {
        console.log(response);
      }
    )
    .catch(
      (error) => {
        console.log('error');
      }
    );
  };
};

最后，我还try 修改了添加标题的调用，如下所示，因为api编码为接受json:

const head = {
  headers: { 'Content-Type': 'application/json' }
};

exports.test = () => {
  return function () {
    return axios.get('https://api.github.com/users/massimopibiri', head)
    .then(
      (response) => {
        console.log(response);
      }
    )
    .catch(
      (error) => {
        console.log('error');
      }
    );
  };
};

但即使这样也没用.希望有人能帮我.其他类似的问题则没有.