名稱 'File' 在庫 'dart:html' 和 'dart:io' 中定義

Question

有誰知道如何解決這個錯誤，這是我的代碼，導入錯誤在“文件”中，錯誤如下：

名稱 'File' 在庫 'dart:html' 和 'dart:io' 中定義。

 @override
  State createState() => ChatScreenState(receiverId: receiverId, receiverAvatar: receiverAvatar);
}




class ChatScreenState extends State<ChatScreen>
{
  final String receiverId;
  final String receiverAvatar;

  ChatScreenState({
    Key key,
    @required this.receiverId,
    @required this.receiverAvatar,
  });

  final TextEditingController textEditingController = TextEditingController();
  final ScrollController listScrollController = ScrollController();
  final FocusNode focusNode = FocusNode();
  bool isDisplaySticker;
  bool isLoading;

  File imageFile;
  String imageUrl;

  String chatId;
  SharedPreferences preferences;
  String id;
  var listMessage;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    focusNode.addListener(onFocusChange);

    isDisplaySticker = false;
    isLoading = false;

    chatId = "";

    readLocal();
  }

我也導入了這個

import 'dart:async';
import 'dart:html';
import 'dart:io';
import 'package:file/file.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_storage/firebase_storage.dart';
import 'package:flutter/material.dart';
import 'package:telegramchatapp/Widgets/FullImageWidget.dart';
import 'package:telegramchatapp/Widgets/ProgressWidget.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:image_picker/image_picker.dart';
import 'package:intl/intl.dart';
import 'package:shared_preferences/shared_preferences.dart';

導入代碼的主要示例

Answer 1

請檢查您是否需要dart.html 。 如果您需要這兩個包，則可以使用類型轉換運算符as 。

//import
import 'dart:io' as io;
import 'dart:html';


//Usage
io.File imageFile;
File htmlFile;

Answer 2

您只需要刪除不需要的導入文件，這些文件將顯示為藍色下划線。 謝謝。