.then() cant callback when plateform is IOS

[daniel031699]

• the version of installed library and RN project.
  "rn-fetch-blob": "^0.10.13",
  "react-native": "0.55.4",
• a sample code snippet/repository is very helpful to spotting the problem.
  _uploadImg(images){
  // 创建上传的请求头，使用fetch-blob必须要遵循name，data的格式，要不然就不成功。
  let body = images.map(i => {
  let PATH = Platform.OS!=='ios'?i.path.replace('file:///',''):i.path;
  return {name: 'file', filename: 'jpg', data: RNFetchBlob.wrap(PATH)};
  });
  RNFetchBlob.fetch('POST',global.httpUrl+'/files',{
  // 上传图片要设置Header
  'Content-Type' : 'multipart/form-data',
  'token': global.unionid
  },body)
  // .uploadProgress({ interval : 250 },(written, total) => {
  // // 查找进度
  // // console.log('查找进度',written/total)
  // })
  // .progress({ count : 10 },(received, total) => {
  // // 上传进度打印
  // // console.log('上传进度打印',received/total)
  // this.props.loadingProgress(received/total)
  // })
  .then((response)=> {
  this.props.addImageUrl(response.data)
  })
  .catch((error)=>{
  // 错误信息
  console.error(error);
  Alert.alert('上传失败，请重试！');
  });
  }