LateInitializationError 是在Dart 语言中引入的一种错误,用于指示一个使用 late 关键字声明的变量在使用前未被初始化。late 关键字允许你延迟变量的初始化,直到它第一次被访问时才进行初始化。但如果在使用该变量之前没有对其进行初始化,就会抛出 LateInitializationError。 2. 导致Flutter中出现LateInitializationError的...
LateInitializationError:Flutter 中的字段尚未初始化 我对Flutter 相当陌生,我要在 Flutter 上构建一个 Messenger Chap 应用程序,我遇到了“LateInitilization:字段‘searchSnapShot’尚未初始化”的问题。以下是导致该问题的代码片段: Widget searchList() { return searchSnapShot != null ? ListView.builder( itemCou...
Flutter LateInitializationError: Field ‘XXXX‘ has not been initialized. 网上有很多解决办法,无法解决我的问题,dart使用高版本后 late 的数据原本以为只在initState 函数里就行了 但是不行 如图需要加setState 放在里面才可行
需求:Flutter请求完成数据后动态改变TabController数量 但是Flutter动态更TabController数量提示LateInitializationError: Fieldtabcontroller' has not beeninitialized. 错误代码如下: lateTabControllertabcontroller;voidonInit()async{super.onInit();//顶部tabs请求await getColumData();}getColumData()async{varresponse=await...
Flutter 开发遇到错误: LateInitializationError: Field 'animationStatus' has not been initialized。 原因是在初始化之前使用了它,我解决这个问题方法是为 AnimationStatus 添加了一个初始状态。 late AnimationStatus animationStatus = AnimationStatus.reverse; ...
我有一个image picker用于我的flutter应用程序,但是在更新到null-safety之后,我将我的File _image;更改为late File _image;,并使用Center(child: _buildImage()),显示所选图像。 所以在修改null-safety之后,我得到了错误LateInitializationError: Field '_image@63124145' has not been initialized.。我无法理解如何...
LateInitializationError: Field '_local@xxxxxxxx' has not been initialized in flutter This is my code. I have imported all the neccessary pacages which were- import'package:flutter/material.dart';import'package:flutter_local_notifications/flutter_local_notifications.dart';import'package:timezone/time...
flutter run rendering/hello_world.dart choose linux Expected results texts are displayed on the screen Actual results There is a error: [ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: LateInitializationError: Field '_renderView@21184722' has not been initialized Code sample...
LateInitializationError: Field ‘animationStatus’ has not been initialized. 执行下面的代码模拟器报上面的错误: import 'package:flutter/animation.dart'; import 'package:flutter/material.dart'; class LogoApp extends StatefulWidget { const LogoApp({Key? key}) : super(key: key); @override _Logo...
I/flutter (11040): LateInitializationError: Local 'result' has not been initialized. I/flutter (11040): #0 LateError._throwLocalNotInitialized (dart:_internal-patch/internal_patch.dart:189) I/flutter (11040): #1 RenderObject.debugNeedsLayout (package:flutter/src/rendering/object.dart:2183) I/...