在Flutter中,"Future not a type"错误通常意味着代码中存在类型错误,导致Future类型的对象无法被正确识别。 要修复这个错误,可以尝试以下方法: 1. 检查代码中是否正确...
今天调试flutter程序时报错。程序运行时报如下错误: type ‘Future<int>’ is not a subtype of type ‘int’ in type cast 错误源码 int order = DatabaseHelper.dbhelper.getTaskGroupRelationOrder() as int; TaskGroupRelation relation = TaskGroupRelation( id:0, taskId:snapshot.data?[index].id, grou...
Flutter : 'Future <dynamic>' is not a subtype of type bool 这个问题是我在使用flutter shared_preferences的时候,自己默认写了几个存储和读取的字段函数,然后出错了 问题在! 我使用的时候非常耿直 如图 getUserNameInput函数如下 没错,这就是基本功不扎实啊,没有完全理解掌握Future的用法 正确写法! 需要使用aw...
按钮的onpressed事件: onpressed:_saveData() 改成 onpressed:_saveData 直接传递函数名给onpressed完事了。
Toggle navigation Search or jump to... Sign in flutter/flutterPublic Notifications Fork27.7k Star167k New issue Jump to bottom Closed FENGZEYOU123opened this issueDec 4, 2020· 3 comments Closed type 'Future<bool> is not a subtype of type 'bool'#71702 ...
Type 'Future<dynamic>' is not a subtype of type 'Future<bool>' error after updating Flutter #16687 Closed CharlesCleveJr opened this issue Apr 18, 2018· 6 comments Comments CharlesCleveJr commented Apr 18, 2018 • edited by Hixie Steps to Reproduce Getting the following errors when ...
import 'dart:convert'; import 'package:flutter/material.dart'; import 'package:started_flutter/data_model.dart'; import 'package:http/http.dart' as http; class FutureStudy extends StatefulWidget { const FutureStudy({super.key}); @override State<FutureStudy> createState() => _FutureStudyState(...
以个人信息为例操作string类型 设置操作： set: set key value 创建key-va...
@文心快码BaiduComatetype 'future<string>' is not a subtype of type 'string' 文心快码BaiduComate 在Dart(Flutter使用的编程语言)中,Future<String>和String是两个不同的类型,它们之间有着本质的区别。下面我将逐一解答你的问题: 1. Future<String>和String类型的区别 String:这是一个基本数据...
Toggle navigation Search or jump to... Sign in Sign up Reseting focus flutter/flutterPublic Notifications Fork27.7k Star167k New issue Jump to bottom Closed Arwantysopened this issueFeb 19, 2019· 2 comments Closed type 'Future<String>' is not a subtype of type 'String' in type cast#2813...