虽然defaultTargetPlatform可以工作，但我建议使用Theme.of(context). targetplatform。这样可以测试iOS行为(因为defaultTargetPlatform总是TargetPlatform)。Android正在测试中)。它还允许小部件的祖先通过将其包装在Theme小部件中来覆盖其目标平台。

所以这里有一个小工具，我用来检测平台和操作系统的反应适当。

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

class Util {

  os getPlatform() {
    if (kIsWeb) {
      return os.Web;
    } else if (Platform.isIOS) {
      return os.IOS;
    } else if (Platform.isAndroid) {
      return os.Android;
    } else if (Platform.isFuchsia) {
      return os.Fuchsia;
    } else if (Platform.isLinux) {
      return os.Linux;
    } else if (Platform.isMacOS) {
      return os.MacOS;
    } else if (Platform.isWindows) {
      return os.Windows;
    }
    return os.Unknown;
  }

  bool isWeb() {
    return (getPlatform()==os.Web);
  }

  bool isMobile() {
    os platform = getPlatform();
    return (platform == os.Android || platform == os.IOS || platform== os.Fuchsia);
  }

  bool isComputer() {
    os platform = getPlatform();
    return (platform == os.Linux || platform == os.MacOS || platform== os.Windows);
  }

}

enum os { Unknown, Web, Android, Fuchsia, IOS, Linux, MacOS, Windows }

**multiple platform you check and run your code according specific platform **

bool isIOS = Theme.of(context).platform == TargetPlatform.iOS;
bool isAndroid = Theme.of(context).platform == TargetPlatform.android;
bool islinux = Theme.of(context).platform == TargetPlatform.linux;
bool isfuchsia = Theme.of(context).platform == TargetPlatform.fuchsia;
bool isMacOS = Theme.of(context).platform == TargetPlatform.macOS;
bool iswindows = Theme.of(context).platform == TargetPlatform.windows;

为更简单的方式为网络和应用程序。试试这个

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


var platformName = '';
if (kIsWeb) {
  platformName = "Web";
} else {
  if (Platform.isAndroid) {
    platformName = "Android";
  } else if (Platform.isIOS) {
    platformName = "IOS";
  } else if (Platform.isFuchsia) {
    platformName = "Fuchsia";
  } else if (Platform.isLinux) {
    platformName = "Linux";
  } else if (Platform.isMacOS) {
    platformName = "MacOS";
  } else if (Platform.isWindows) {
    platformName = "Windows";
  }
}
print("platformName :- "+platformName.toString());

你可以这样做

defaultTargetPlatform == TargetPlatform.iOS
          ? kIOSTheme
          : kDefaultTheme,

从导入'包:flutter/foundation.dart';

您可以使用通用平台包:

https://pub.dev/packages/universal_platform

import 'package:universal_platform/universal_platform.dart';

bool isIos = UniversalPlatform.isIOS;
bool isAndroid = UniversalPlatform.isAndroid;
bool isWeb = UniversalPlatform.isWeb;
print('iOS: $isIos');
print('Android: $isAndroid');
print('Web: $isWeb');