flutter - 不支持的操作 : Platform. _operatingSystem

Question

我的 flutter 代码没有在网络上运行。

我发现“bool kisweb”可以用来检测平台。但我的代码在“FirebaseAuth.instance”处失败。这是否意味着我不能在网络上使用 Firebaseauth，因为它可能取决于 dart:io？

Launching lib\main.dart on Chrome in debug mode... Debug service listening on ws://127.0.0.1:54007/NghsYaNRLKE= compiled for web ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════ The following UnsupportedError was thrown building MultiProvider: Unsupported operation: Platform._operatingSystem The relevant error-causing widget was: MultiProvider org-dartlang-app:///packages/My_App/main.dart:30:10 When the exception was thrown, this was the stack: package:build_web_compilers/src/dev_compiler/dart_sdk.js 3996:11
throw_ package:build_web_compilers/src/dev_compiler/dart_sdk.js 57810:17 _operatingSystem package:build_web_compilers/src/dev_compiler/dart_sdk.js 57859:27 get operatingSystem package:build_web_compilers/src/dev_compiler/dart_sdk.js 57772:27 get _operatingSystem package:build_web_compilers/src/dev_compiler/dart_sdk.js 5020:17 get package:build_web_compilers/src/dev_compiler/dart_sdk.js 57796:26 get isIOS package:build_web_compilers/src/dev_compiler/dart_sdk.js 5020:17 get package:firebase_core/src%5Cfirebase_app.dart 15:16
get defaultAppName package:build_web_compilers/src/dev_compiler/dart_sdk.js 5020:17 get package:firebase_core/src%5Cfirebase_app.dart 51:57 get instance package:build_web_compilers/src/dev_compiler/dart_sdk.js 5020:17 get package:firebase_auth/src%5Cfirebase_auth.dart 25:67
get instance package:build_web_compilers/src/dev_compiler/dart_sdk.js 5020:17 get internalCallback ════════════════════════════════════════════════════════════════════════════════════════════════════ Exited

请帮我解决这个问题。

Answer 1

我重新打开这个问题是为了给出一个更合适的答案，现在可以在 native 中使用 flutter :

import 'package:flutter/foundation.dart';
if (defaultTargetPlatform == TargetPlatform.iOS || defaultTargetPlatform == TargetPlatform.android) {
    // Some android/ios specific code
}
else if (defaultTargetPlatform == TargetPlatform.linux || defaultTargetPlatform == TargetPlatform.macOS || defaultTargetPlatform == TargetPlatform.windows) {
    // Some desktop specific code there
}
else {
    // Some web specific code there
}