对于在iOS和Android上略有不同的UI,即在不同的平台上,必须有一种方法来检测应用程序在哪个平台上运行,但我在文档中找不到它。是什么?
当前回答
如果你同时导入"dart:io"和"dart:html",它不知道要导入哪个平台并给出错误。导入其中一个。
import 'dart:io';
Platform.isIOS ? CupertinoWidget() : MaterialWidget()
其他回答
Dart主机平台检查。
导入'dart:io'作为io;
_checkingHostPlatform(){
if(IO.Platform.isAndroid){
//Execute code for android
}else if(IO.Platform.isIOS){
//Execute code for iOS
}else{
//Execute code for other platforms
}
}
你可以这样做
defaultTargetPlatform == TargetPlatform.iOS
? kIOSTheme
: kDefaultTheme,
从导入'包:flutter/foundation.dart';
import 'dart:io' show Platform;
if (Platform.isAndroid) {
// Android-specific code
} else if (Platform.isIOS) {
// iOS-specific code
}
所有选项包括:
Platform.isAndroid
Platform.isFuchsia
Platform.isIOS
Platform.isLinux
Platform.isMacOS
Platform.isWindows
你也可以使用kIsWeb来检测你是否在web上运行,kIsWeb是一个全局常量,指示应用程序是否被编译为在web上运行:
import 'package:flutter/foundation.dart' show kIsWeb;
if (kIsWeb) {
// running on the web!
} else {
// NOT running on the web! You can check for additional platforms here.
}
平台文档:https://api.flutter.dev/flutter/dart-io/Platform-class.html kIsWeb文档:https://api.flutter.dev/flutter/foundation/kIsWeb-constant.html
import 'dart:io' show Platform;
if (Platform.isAndroid) {
// Android-specific code
} else if (Platform.isIOS) {
// iOS-specific code
}else if (Platform.isFuchsia) {
// Fuchsia-specific code
}else if (Platform.isLinux) {
// Linux-specific code
}else if (Platform.isMacOS) {
// MacOS-specific code
}else if (Platform.isWindows) {
// Windows-specific code
}else if (Platform.isWindows) {
// Windows-specific code
}
网络
import 'package:flutter/foundation.dart' show kIsWeb;
if (kIsWeb) {
// running on the web!
} else {
// NOT running on the web! You can check for additional platforms here.
}
import 'dart:io' as io;
if(io.Platform.isAndroid){
doSomething();
}else {
doSomethingElse();
}