Error:
/C:/flutter/.pub-cache/hosted/pub.dartlang.org/image-2.1.19/lib/src/formats/psd/effect/psd_drop_shadow_effect.dart: Error: The control character U+0000 can only be used in strings and comments.
/C:/flutter/.pub-cache/hosted/pub.dartlang.org/image-2.1.19/lib/src/formats/psd/effect/psd_effect.d
更新:感谢@Rjulcaa answer,我的地图现在是一个列表,但是这个列表没有显示在UI上。我发现我需要用一个FutureBuilder来处理未来,所以如果有人遇到这个问题,记得在UI的主体中添加一个FutureBuilder,并在构建器上返回您想要显示的小部件。 我正在制作一个待办事项列表教程,我试图在我的todoList上添加编码功能,并将其保存在sharedPreferences上,当我启动应用程序时,它会在屏幕上检索到它 这是我的TODO类 class Todo {
Todo ({this.title,this.isDone = false});
String title;
b
我的json响应是{"quoteText":"You\'re not obligated to win. You\'re obligated to keep trying to do the best you can every day.", "quoteAuthor":"Marian Edelman"},我试图用Map<String, dynamic> quoteData = jsonDecode(response.body);解码,但是得到了这个异常 [ERROR:flutter/shell/co
我使用Hive在expenseBox中存储日常开支如下:
final String now = DateFormat('yyyyMMdd').format(DateTime.now());
List<Expense> todaysExpenses = Hive.box<List<Expense>>('expenses').get(now, defaultValue: []) as List<Expense>;
todaysExpenses.add(expense);
expenseBox.put(now, toda
当我从一个小部件导航到另一个小部件时,我遇到了这个问题,我搜索了一下,我发现我应该用(FloatActionButton)添加(heroTag),但我没有这个小部件,这是问题消息:
══╡ EXCEPTION CAUGHT BY SCHEDULER LIBRARY ╞═════════════════════════════════════════════════════════
The following assertion was thrown during a scheduler callback:
There are multiple heroes that share the sam
嗨开发人员,我得到了这个问题,
W/System ( 7624): Ignoring header X-Firebase-Locale because its value was null.
E/flutter ( 7624): [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: type 'FirebaseAuthException' is not a subtype of type 'String'
E/flutter ( 7624): #0 CubitApp.use
我有一个名为Database.dart的文件,在这里我插入了“虚拟”数据,并设置了到Firebase的连接。使用Meals.dart,我希望稍后在屏幕上显示数据。现在,我想在我的调试控制台中显示这个虚拟数据。我试图更改Meals.dart中的“Meals.dart”,但我没有搞清楚代码中的问题是什么。
,这是我得到的错误代码.
════════ Exception caught by widgets library ═══════════════════════════════════
The following NoSuchMethodError was thrown building Me
下面的代码允许您将参数保存为各种设备中的共享,但是在代码执行过程中我会看到以下错误。如何纠正此错误?
错误:
Unhandled Exception: type 'String' is not a subtype of type 'int'
#0 Storage.salva (package:Myapp/utils/support.dart:17:24)
<asynchronous suspension>
#1 _LoginPageState._salvataggiovalorilogin (package:Myapp/ui/lo
当我使用Dart的以AES CTR模式解密某些东西时,我得到了这个异常:
E/flutter (19095): Invalid argument(s): Input data length must be a multiple of cipher's block size
E/flutter (19095): #0 PaddedBlockCipherImpl.process (package:pointycastle/padded_block_cipher/padded_block_cipher_impl.dart:55:9)
E/flutter (19095): #1