flutter-web

问题 this question is an improvement for this question. In this case, I would like to reproduce the vertical menu the you can see on the left side of this we base. If you click the link relative to the example on the left you see a number of menu. For instance, clicking on Base you are going to see a vertical menu appearing and disappearing. I would like to know how to reproduce it as well. An example code would be really appreciated. Thanks all 回答1: You can achieve this by simply using a

问题 Problem Statement Hi, basically, what I want is to send a file through a POST to a python server-side Flask API. The goal is to provide the user with a file picker interface, and after him/her choosing the desired .txt file, send it through Dio using a POST request. A button (Widget) should call this uploadFile() function and everything should be handle by it Code Here is my current code: import 'package:dio/dio.dart'; import 'dart:html'; import 'package:http/http.dart' as http; BaseOptions

问题 I am trying to upload an image in UInt8List format to firebase storage. I am using "StorageReference.putData". I keep getting this error saying that putFile isn't defined. I have updated to all the lated firebase packages and still no success. Is putData not possible on Flutter Web? I have tried to update all packages and then 'flutter clean', 'flutter packages get' The reason I am not using "putFile" is because Flutter Web doesn't support dart:io which holds the specific File class required

问题 I am trying to upload an image in UInt8List format to firebase storage. I am using "StorageReference.putData". I keep getting this error saying that putFile isn't defined. I have updated to all the lated firebase packages and still no success. Is putData not possible on Flutter Web? I have tried to update all packages and then 'flutter clean', 'flutter packages get' The reason I am not using "putFile" is because Flutter Web doesn't support dart:io which holds the specific File class required

问题 I am working on a iOS/Android/Web app where I am generating a PDF based on user input using the pdf plugin here: https://pub.dev/packages/pdf. On iOS and Android, I have access to the file system, so I am able to save the generated pdf first, and then open it with any pdf display plugin. However, for Flutter web, as far as I know, there is no access to any type of file system. All the pdf render plugins that I've seen assume that the pdf file is either stored in a file, or on the web. I

问题 I am working on a iOS/Android/Web app where I am generating a PDF based on user input using the pdf plugin here: https://pub.dev/packages/pdf. On iOS and Android, I have access to the file system, so I am able to save the generated pdf first, and then open it with any pdf display plugin. However, for Flutter web, as far as I know, there is no access to any type of file system. All the pdf render plugins that I've seen assume that the pdf file is either stored in a file, or on the web. I

问题 I'm trying to implement sign-in function with Firebase Authentication in Flutter for Web app. I can already use Firestore to store/ extract data in the same app without signing-in. When executing the app, it shows the error "NoSuchMethodError: tried to call a non-function, such as null: 'dart.global.firebase.auth'" I think the error is caused by calling auth() method. Can you please advise how I should fix it? Or, is Firebase Authentication not supported Flutter for web yet?? Imported

问题 May I ask your help about this error It's happen when I'm trying for the first time running my flutter web which using flutter run -d chrome Launching lib\main.dart on Chrome in debug mode... Syncing files to device Chrome... 25,220ms (!) GET /dwds/src/injected/client.js Error thrown by handler. FileSystemException: Cannot open file, path = 'C:\Users\Acer\flutter\.pub-cache\hosted\pub.dartlang.org\dwds-2.0.1\lib\src\injected\client.js' (OS Error: The system cannot find the path specified. ,

问题 May I ask your help about this error It's happen when I'm trying for the first time running my flutter web which using flutter run -d chrome Launching lib\main.dart on Chrome in debug mode... Syncing files to device Chrome... 25,220ms (!) GET /dwds/src/injected/client.js Error thrown by handler. FileSystemException: Cannot open file, path = 'C:\Users\Acer\flutter\.pub-cache\hosted\pub.dartlang.org\dwds-2.0.1\lib\src\injected\client.js' (OS Error: The system cannot find the path specified. ,

问题 May I ask your help about this error It's happen when I'm trying for the first time running my flutter web which using flutter run -d chrome Launching lib\main.dart on Chrome in debug mode... Syncing files to device Chrome... 25,220ms (!) GET /dwds/src/injected/client.js Error thrown by handler. FileSystemException: Cannot open file, path = 'C:\Users\Acer\flutter\.pub-cache\hosted\pub.dartlang.org\dwds-2.0.1\lib\src\injected\client.js' (OS Error: The system cannot find the path specified. ,