there is an array of conversations on the server. I want to push the pictures to the array through the pictures uploaded by upload. 
 conversation structure is shown in figure 
  
render () {
const uploadButton=(
  <React.Fragment>
    <p className="ant-upload-drag-icon">
      <Icon type="inbox" />
    
    <p className="ant-upload-text">
    <p className="ant-upload-hint">.
  </React.Fragment>
)
const Dragger=Upload.Dragger;
const myUrl=`//global.serverBaseUrl/Admins/${this.props.adminId}/feedbacks/${this.props.feedbackId}/`;   
/**/
return(
  <Dragger
    name="file"
    multiple={true}
    data=   //
    accept="image/*"
    action={myUrl}
    onChange={this.handleUploadChange}//
  >
    {this.state.fileList.length>=3?null:uploadButton}
  </Dragger>
)}
