Flutter Web 平台检查答案

【问题标题】：Flutter web platform checkFlutter Web 平台检查
【发布时间】：2020-12-21 13:33:38
【问题描述】：

我正在尝试找到一种方法来查看我的 Flutter Web 项目在哪个平台（iOS 或 Android）上运行。当我使用if (Platform.isIOS) { //do something } 时，我遇到以下错误：

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。

【问题讨论】：

标签： flutter dart flutter-web

【解决方案1】：

尝试这样做：

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

if (kIsWeb) {
  //do something
}

【讨论】：

【解决方案2】：

import 'package:flutter/foundation.dart';

if (defaultTargetPlatform == TargetPlatform.android) {
  //current platform is Android
} else if(defaultTargetPlatform == TargetPlatform.macOS){
  //current platform is macOS
}...

【讨论】：