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
感谢科林,最终答案是:
bool isIOS = Theme.of(context).platform == TargetPlatform.iOS;
其他回答
**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;
你可以这样做
defaultTargetPlatform == TargetPlatform.iOS
? kIOSTheme
: kDefaultTheme,
从导入'包:flutter/foundation.dart';
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;
}
}
}
import 'dart:io' show Platform; //at the top
String os = Platform.operatingSystem; //in your code
print(os);
您可以将此扩展添加到项目中
import 'package:flutter/material.dart';
extension PlatformExtension on BuildContext {
bool get isMobile =>
Theme.of(this).platform == TargetPlatform.iOS ||
Theme.of(this).platform == TargetPlatform.android;
bool get isDesktop =>
Theme.of(this).platform == TargetPlatform.macOS ||
Theme.of(this).platform == TargetPlatform.windows ||
Theme.of(this).platform == TargetPlatform.linux;
}
extension TargetPlatformExtension on TargetPlatform {
bool get isMobile =>
this == TargetPlatform.iOS || this == TargetPlatform.android;
bool get isDesktop =>
this == TargetPlatform.linux ||
this == TargetPlatform.macOS ||
this == TargetPlatform.windows;
}
现在您可以使用。
内置context => context.isDesktop 目标平台=> defaulttarded平台
建议从上下文访问平台。
要检测您的应用程序是否在浏览器上运行,您可以轻松地使用基础库中的kIsWeb常量。
import 'package:flutter/foundation.dart';
log('$kIsWeb'); // will print true if the app is running on a browser
注意,如果你在桌面上运行web应用程序,isDesktop getter将返回true,对于移动平台也是如此。 为了避免这种情况。
import 'package:flutter/foundation.dart';
if (!kIsWeb && defaultTargetPlatform.isDesktop) {
// do stuff for desktop apps only
}
if (!kIsWeb && defaultTargetPlatform.isMobile) {
// do stuff for mobile apps only
}
您可以修改扩展以获得您喜欢的实现。