小编Col*_*ole的帖子

在我的mapStateToProps函数中,我设置idToken和accessToken存储在状态中的值.这是有效的,因为我已经能够从组件中引用这些值.在mapDispatchToProps我尝试使用这些道具作为我的行动中的参数.但是,ownProps是一个空对象.为什么它不具备idToken和accessToken？

容器:

import { connect } from 'react-redux'
import { toggleAddQuestionModal, fetchFriends } from '../actions'
import AddQuestionButtonComponent from '../components/AddQuestionButton'

const mapStateToProps = (state) => {
  auth = state.auth
  return {
    idToken: auth.token.idToken,
    accessToken: auth.profile.identities[0].accessToken,
  }
}

const mapDispatchToProps = (dispatch, ownProps) => {
  return {
    didPress: (idToken, accessToken) => {
      dispatch(toggleAddQuestionModal(true))
      dispatch(fetchFriends(ownProps.idToken, ownProps.accessToken))
    }
  }
}

AddQuestionButton = connect(
  mapStateToProps,
  mapDispatchToProps
)(AddQuestionButtonComponent)

export default AddQuestionButton

零件: …

尝试使用预先签名的URL从React Native上传图像到没有运气.这是我的代码:

在节点中生成预先签名的URL:

const s3 = new aws.S3();

const s3Params = {
  Bucket: bucket,
  Key: fileName,
  Expires: 60,
  ContentType: 'image/jpeg',  
  ACL: 'public-read'
};

return s3.getSignedUrl('putObject', s3Params);

这是对S3的RN请求:

var file = {
  uri: game.pictureToSubmitUri,
  type: 'image/jpeg',
  name: 'image.jpg',
};

const xhr = new XMLHttpRequest();
var body = new FormData();
body.append('file', file);
xhr.open('PUT', signedRequest);
xhr.onreadystatechange = () => {
  if(xhr.readyState === 4){
    if(xhr.status === 200){
      alert('Posted!');
    }
    else{
      alert('Could not upload file.');
   }
 }
};
xhr.send(body);

game.pictureToSubmitUri = assets-library://asset/asset.JPG?id=A282A2C5-31C8-489F-9652-7D3BD5A1FAA4&ext=JPG

signedRequest = https://my-bucket.s3-us-west-1.amazonaws.com/8bd2d4b9-3206-4bff-944d-e06f872d8be3?AWSAccessKeyId=AKIAIOLHQY4GAXN26FOQ&Content-Type=image%2Fjpeg&Expires=1465671117&Signature=bkQIp5lgzuYrt2vyl7rqpCXPcps%3D&x-amz-acl=public-read …