如何在ionic中显示共享底单进行文件共享？

ionic start file-sharing-app blank

ionic cordova plugin add cordova-plugin-file-transfer
npm install @ionic-native/file-transfer

ionic generate page file-sharing

import { FileTransfer, FileTransferObject } from '@ionic-native/file-transfer/ngx';

constructor(private transfer: FileTransfer) { }

uploadFile() {
  const fileTransfer: FileTransferObject = this.transfer.create();

  let options: FileUploadOptions = {
    fileKey: 'file',
    fileName: 'filename.jpg',
    chunkedMode: false,
    mimeType: 'image/jpeg',
    headers: {}
  }

  fileTransfer.upload('<path_to_file>', '<api_endpoint>', options)
    .then((data) => {
      // 文件上传成功
    }, (err) => {
      // 文件上传失败
    });
}

<ion-header>
  <ion-toolbar>
    <ion-title>
      共享底单
    </ion-title>
  </ion-toolbar>
</ion-header>

<ion-content>
  <ion-button (click)="uploadFile()">上传文件</ion-button>
  <!-- 在这里显示共享底单 -->
</ion-content>