import 'package:flutter/material.dart'; void main() => runApp(MyApp()); class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, home: MyAppOne(), ); } } cl…

body: FutureBuilder( future: PDFDocument.openAsset('assets/button.pdf'), builder: (context, AsyncSnapshot<PDFDocument> snapshot) { if (!snapshot.hasData || snapshot.hasError) { FutureBuilderはAPI呼び出しとかにいいと思う</pdfdocument>