“type 'null' is not a subtype of type 'string'”错误解析 1. 错误含义 错误“type 'null' is not a subtype of type 'string'”通常出现在静态类型检查语言中,如Dart或TypeScript,意味着在代码执行过程中,一个期望为string类型的变量或表达式被赋予了null值。在严格类型检查的上下文中,null不是string的有...
flutter数据解析出现type ‘String‘ is not a subtype of type ‘int‘错误,程序员大本营,技术文章内容聚合第一站。
type 'int' is not a subtype of type 'string' Flutter类“_InternalLinkedHashMap<String,dynamic>”没有实例方法 Flutter:将_InternalLinkedHashMap<String、dynamic>写入Rx<TestModel> type 'string' is not a subtype of type 'int' of 'index' ...
Unhandled Exception: type 'String' is not a subtype of type 'Map<String, dynamic>' 1 该异常指向了我进行Json Model化的代码:(User为自己编写的Json Model类) Response res = await dio.get<String>(...); return User.fromJson(res.data); // 异常指向了这一行 1 2 分析原因: 初步分析是User...
Map<String, dynamic> body = { "tokens":["1"], "data": "123",};var response = await Dio() .post("http://192.168.1.100:4001/api",data: body);print(response);__EOF__本文作者: Locog 本文链接: https://www.cnblogs.com/Locog/p/12696660.html ...
Flutter Dio 3.x版本上传图片提示 type ‘_File’ is not a subtype of type 'String’如何解决呢? 其实主要原因是:dio 3.0.0为了支持Flutter Web,需要进行较大重构,因此无法直接兼容2.1.x 解决方案如下: import'dart:io';import'package:flutter/material.dart';import'package:image_picker/image_picker.dart...
在编程中,如何解决类型错误“type 'string' is not a subtype of type 'int' of 'index'”? 这个错误通常出现在什么情况下? 如何在代码中检查变量类型以避免此类错误? 这个错误信息表明在编程过程中,尝试使用一个字符串类型的值作为索引来访问某个数据结构(如列表或数组),但该数据结构期望的...
Oops; flutter has exited unexpectedly: "type 'Null' is not a subtype of type 'String' in type cast". After updating to version 3.7.11, I get the following error when I run "flutter pub get" on my project. Command flutter run --machine --start-paused -d 09221FDD4006KN --devtools-...
Flutter报错:Unhandled Exception: type '_Map<String, dynamic>' is not a subtype of type 'String',Flutter报错:UnhandledException:type'_Map<String,dynamic>'isnotasubtypeoftype'String'
type ' String‘is not a subtype of type 'int’in type cast“C语言提供了几个标准库函数，可以...