Flutter web平台检查

Question

我正试图找到一种方法来查看我的flutter web项目正在哪个平台(iOS或Android(上运行。当我使用if (Platform.isIOS) { //do something }时，我会遇到以下错误：

Error: Unsupported operation: Platform._operatingSystem
at Object.throw_ [as throw] (http://localhost:44159/dart_sdk.js:4334:11)
at Function._operatingSystem (http://localhost:44159/dart_sdk.js:55064:17)
at Function.get operatingSystem [as operatingSystem] (http://localhost:44159/dart_sdk.js:55110:27)
at get _operatingSystem (http://localhost:44159/dart_sdk.js:55023:27)
at Function.desc.get [as _operatingSystem] (http://localhost:44159/dart_sdk.js:4819:15)
at get isIOS (http://localhost:44159/dart_sdk.js:55047:26)
at Function.desc.get [as isIOS] (http://localhost:44159/dart_sdk.js:4819:15)
at http://localhost:44159/packages/itoll/main.dart.lib.js:364:33
at wrapper (http://localhost:44159/dart_sdk.js:59904:30)
at http://localhost:44159/:70:11123

有办法吗？

谢谢。

Answer 1

试着这样做：

import 'package:flutter/foundation.dart' show kIsWeb;
if (kIsWeb) {
//do something
}

Answer 2

import 'package:flutter/foundation.dart';
if (defaultTargetPlatform == TargetPlatform.android) {
//current platform is Android
} else if(defaultTargetPlatform == TargetPlatform.macOS){
//current platform is macOS
}...

Answer 3

import 'package:flutter/foundation.dart' show kIsWeb;

if (kIsWeb) {
// https://developer.mozilla.org/en-US/docs/Web/API/Navigator/userAgentData
}

对于下一个与Antonio/OP有相同问题的人。(我想评论，但没有足够的分数(