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
导入io库很简单
import'dart:io' show Platform;
void main(){
if(Platform.isIOS){
return someThing();
}else if(Platform.isAndroid){
return otherThing();
}else if(Platform.isMacOS){
return anotherThing();
}
或者用非常简单的方式
Platform.isIOS ? someThing() : anOther(),
其他回答
你可以这样做
defaultTargetPlatform == TargetPlatform.iOS
? kIOSTheme
: kDefaultTheme,
从导入'包:flutter/foundation.dart';
导入io库很简单
import'dart:io' show Platform;
void main(){
if(Platform.isIOS){
return someThing();
}else if(Platform.isAndroid){
return otherThing();
}else if(Platform.isMacOS){
return anotherThing();
}
或者用非常简单的方式
Platform.isIOS ? someThing() : anOther(),
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.
}
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。
这个自定义创建的类将帮助您检测平台:
import 'package:flutter/foundation.dart'
show defaultTargetPlatform, kIsWeb, TargetPlatform;
enum Os {
web,
android,
ios,
macOS,
linux,
windows,
fuchsia,
}
class Platform {
const Platform();
/// Platform is Web.
static bool get isWeb => os == Os.web;
/// Platform is Android.
static bool get isAndroid => os == Os.android;
/// Platform is IOS.
static bool get isIOS => os == Os.ios;
/// Platform is Fuchsia.
static bool get isFuchsia => os == Os.fuchsia;
/// Platform is Linux.
static bool get isLinux => os == Os.linux;
/// Platform is MacOS.
static bool get isMacOS => os == Os.macOS;
/// Platform is Windows.
static bool get isWindows => os == Os.windows;
/// Platform is Android or IOS.
static bool get isMobile => isAndroid || isIOS;
/// Platform is Android or IOS or Fuchsia.
static bool get isFullMobile => isMobile || isFuchsia;
/// Platform is Linux or Windows or MacOS.
static bool get isDesktop => isLinux || isWindows || isMacOS;
/// Getting the os name.
static Os get os {
if (kIsWeb) {
return Os.web;
}
switch (defaultTargetPlatform) {
case TargetPlatform.android:
return Os.android;
case TargetPlatform.iOS:
return Os.ios;
case TargetPlatform.macOS:
return Os.macOS;
case TargetPlatform.windows:
return Os.windows;
case TargetPlatform.fuchsia:
return Os.fuchsia;
case TargetPlatform.linux:
return Os.linux;
}
}
}