摘要:在这里可以处理一些传过来的参数,然后我们将参数放入类中实例化。因为虽然是一个,但是实例化的时候是两个不同的,所以第一个页面的数据变化了也不会影响到这里。
说明目前增加了路由跳转,可以带参数跳转页面。下拉可以自定义刷新样式,IOS点击Status Bar回到顶部,目前已经测试过。状态管理器使用Mobx,我自己觉得对于Redux使用起来会复杂一点,下面是提供的预览GIF图,卡顿现象是因为屏幕录制的帧率有点低。
项目地址:github.com/Tecode/flut…,不定时的更新,欢迎start。
安卓预览IOS预览
依赖库
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
mobx:
flutter_mobx: // Mobx
cupertino_icons: ^0.1.2
flutter_svg: ">=0.12.4" // 处理SVG图片
carousel_slider: ^1.3.0 // 轮播图
fluro: "^1.4.0" // 路由
provider: ^2.0.1 // 用于包裹mobx
dev_dependencies:
flutter_test:
sdk: flutter
build_runner: ^1.3.1 //Mobx依赖
mobx_codegen: // Mobx依赖
Flutter版本
Flutter 1.5.9-pre.223 • channel master • https://github.com/flutter/flutter.git
Framework • revision b76a1e8312 (25 hours ago) • 2019-05-13 09:06:30 +0100
Engine • revision 816d3fc586
Tools • Dart 2.3.1 (build 2.3.1-dev.0.0 a0290f823c)
修改系统状态栏颜色
import "package:flutter/material.dart";
import "package:flutter/cupertino.dart";
import "package:flutter_book/containers/Entrance.dart";
import "package:flutter_book/helpers/constants.dart" show AppColors;
import "package:flutter/services.dart";
void main() {
// 修改系统状态栏颜色
SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle(
systemNavigationBarColor: Color(AppColors.themeColor), // navigation bar color
statusBarColor: Color(AppColors.themeColor), // status bar color
));
runApp(MyApp());wenti
}
自定义appBar左侧导航显示的内容
appBar: AppBar(
...
leading: IconButton(
alignment: Alignment.centerRight,
icon: SvgPicture.asset(
"assets/icon/icon_trophy.svg",
width: Constants.appBarIconSize + 5.0,
height: Constants.appBarIconSize + 5.0,
),
onPressed: () {
print("ok");
},
)
...
)
媒体查询
MediaQuery.of(context)资源配置
assets: - assets/icon/ - lib/containers/ - lib/model/ - lib/helpers/ - lib/routers/ - assets/images/路由配置
这里我使用的是fluro配置路由,这里我偷一下懒了,就没有使用原生的方法,不过他帮我们封装了好多的方法我们可以很方便的去使用它,下面说一下路由的配置。
lib outers outers.dart配置路由对应的模块,可以理解成Vue-router或React-router一样,先要将对应的路由配置到你要跳转的模块去。
import "package:fluro/fluro.dart";
import "package:flutter/material.dart";
import "package:flutter_book/routers/route_handlers.dart";
class Routes {
static String root = "/";
static String setting = "/setting";
static String detail = "/detail";
static String demoSimpleFixedTrans = "/demo/fixedtrans";
static String demoFunc = "/demo/func";
static String deepLink = "/message";
static void configureRoutes(Router router) {
router.notFoundHandler = Handler(
handlerFunc: (BuildContext context, Map<String, List<String>> params) {
print("ROUTE WAS NOT FOUND !!!");
});
router.define(root, handler: rootHandler);
router.define(setting, handler: settingRouteHandler);
router.define(detail, handler: detailRouterHandler);
}
}
lib
outers
oute_handlers.dart
在这里可以处理一些传过来的参数,然后我们将参数放入类中实例化。
import "package:flutter_book/containers/Setting.dart";
import "package:flutter_book/containers/FirstScreen.dart";
import "package:flutter_book/containers/Detail.dart";
import "package:fluro/fluro.dart";
import "package:flutter/material.dart";
import "package:flutter_book/helpers/fluro_convert_util.dart";
Handler rootHandler = Handler(
handlerFunc: (BuildContext context, Map<String, List<String>> params) {
return FirstScreen();
});
Handler settingRouteHandler = Handler(
handlerFunc: (BuildContext context, Map<String, List<String>> params) {
return Setting();
});
Handler detailRouterHandler = Handler(
handlerFunc: (BuildContext context, Map<String, List<String>> params) {
return Detail(
title: FluroConvertUtils.fluroCnParamsDecode(params["title"]");
libmain.dart
将路由与Flutter绑定,这样你的路由就可以生效了
class MyApp extends StatelessWidget {
MyApp() {
final router = new Router();
Routes.configureRoutes(router);
Application.router = router;
}
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: "Flutter Book",
theme: ThemeData(
primaryColor: Color(AppColors.themeColor),
accentColor: Color(AppColors.themeColor),
scaffoldBackgroundColor: Color(AppColors.themeColor)),
home: Entrance(),
onGenerateRoute: Application.router.generator,
);
}
}
使用
import "package:fluro/fluro.dart";
import "package:flutter_book/routers/application.dart";
import "package:flutter_book/helpers/fluro_convert_util.dart";
...代码省略了
Application.router.navigateTo(
context,
"/detail");${FluroConvertUtils.fluroCnParamsEncode("热门图书")}",
transition: TransitionType.native
);
路由传参
路由不支持中文字符需要编码再解码
import "dart:convert";
/// fluro 参数编码解码工具类
class FluroConvertUtils {
/// fluro 传递中文参数前,先转换,fluro 不支持中文传递
static String fluroCnParamsEncode(String originalCn) {
StringBuffer sb = StringBuffer();
var encoded = Utf8Encoder().convert(originalCn);
encoded.forEach((val) => sb.write("$val,"));
return sb.toString().substring(0, sb.length - 1).toString();
}
/// fluro 传递后取出参数,解析
static String fluroCnParamsDecode(String encodedCn) {
var decoded = encodedCn.split("[").last.split("]").first.split(",");
var list = <int>[];
decoded.forEach((s) => list.add(int.parse(s.trim())));
return Utf8Decoder().convert(list);
}
}
编码
import "package:flutter_book/helpers/fluro_convert_util.dart";
Application.router.navigateTo(
context,
"/detail");${FluroConvertUtils.fluroCnParamsEncode("热门图书")}",
transition: TransitionType.native,
// transitionDuration: const Duration(milliseconds: 300),
);
解码
import "package:flutter_book/helpers/fluro_convert_util.dart";
Handler detailRouterHandler = Handler(
handlerFunc: (BuildContext context, Map<String, List<String>> params) {
return Detail(
title: FluroConvertUtils.fluroCnParamsDecode(params["title"]");
使用Mobx状态管理器
pubspec.yaml配置
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
mobx:
flutter_mobx:
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
flutter_svg: ">=0.12.4"
carousel_slider: ^1.3.0
fluro: "^1.4.0"
provider: ^2.0.1
dev_dependencies:
flutter_test:
sdk: flutter
build_runner: ^1.3.1
mobx_codegen:
多个页面使用一个store
这里要使用到provider: ^2.0.1,类似React的Provider。使用Provider来包裹我们的组件,使Mobx和我们的React联系起来。
React ProviderDart Provider
Dart Provider也是一样的道理,将Mobx和Flutter联系起来,lib/main.dart完整代码,这样使用可以保证你实例化的的store是同一个类。
runApp(MultiProvider( providers: [ Provider如何使用( builder: (_) => FindStore(), ) ], child: MyApp(), ));
我的导航发现那一栏和下面的内容是分开的,当我点击导航的切换按钮就会改变显示的页面,这样我们可以复用显示层的UI组件,数据放专门的文件去管理。
来看看如何实现的
通过点击然后改变数据findStore.setTile("tile", true);
导航lib/widgets/NavBar/FindNavBar.dartimport "package:flutter/material.dart";
import "package:flutter_svg/svg.dart";
import "package:flutter_mobx/flutter_mobx.dart";
import "package:flutter_book/helpers/constants.dart";
import "package:flutter_book/stores/findStore.dart";
import "package:provider/provider.dart";
class FindNavBar extends StatelessWidget {
@override
Widget build(BuildContext context) {
// 我们的store
final findStore = Provider.of(context);
return Observer(
builder: (_) => AppBar(
title: Text("发现"),
actions: [
IconButton(
alignment: Alignment.centerRight,
onPressed: () {
findStore.setTile("tile", true);
findStore.counter();
},
icon: SvgPicture.asset(
"assets/icon/icon_more.svg",
width: Constants.appBarIconSize + 2.0,
height: Constants.appBarIconSize + 2.0,
color: Color(findStore.tile
");"tile", false);
},
icon: SvgPicture.asset(
"assets/icon/icon_cube.svg",
width: Constants.appBarIconSize + 2.0,
height: Constants.appBarIconSize + 2.0,
color: Color(findStore.tile
");true,
elevation: 0,
),
);
}
}
内容lib/containers/Find.dart
检测到数据发生变化,页面重新渲染得到新的页面
import "package:flutter/material.dart";
import "package:flutter_book/widgets/Find/BookTile.dart";
import "package:flutter_book/widgets/Find/BookCover.dart";
import "package:flutter_book/stores/findStore.dart";
import "package:provider/provider.dart";
import "package:flutter_mobx/flutter_mobx.dart";
class Find extends StatefulWidget {
@override
_FindState createState() => _FindState();
}
class _FindState extends State<Find> {
@override
Widget build(BuildContext context) {
final findStore = Provider.of(context);
return Observer(builder: (_) => findStore.tile ");
FindStore lib/stores/findStore.dart
import "package:mobx/mobx.dart";
// Include generated file
part "findStore.g.dart";
// This is the class used by rest of your codebase
class FindStore = _FindStore with _$FindStore;
// The store-class
abstract class _FindStore implements Store {
@observable
bool tile = false;
@observable
num count = 0;
@action
void setTile(String key, dynamic value) => tile = value;
@action
num counter() => this.count++;
}
注意
如果你是很多个页面共享一个Store不要直接导入然后实例化,例如:
第一个页面 demo1.dart这个页面我们导入了counter.dart这个store而且我们将它实例化,当我们点击的时候数据发生变化页面会重新渲染
import "package:flutter/material.dart";
import "package:flutter_mobx/flutter_mobx.dart";
import "counter.dart"; // Import the Counter
final counter = Counter(); // Instantiate the store
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: "MobX",
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
const MyHomePage();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("MobX Counter"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"数值是:",
),
// Wrapping in the Observer will automatically re-render on changes to counter.value
Observer(
builder: (_) => Text(
"${counter.value}",
style: Theme.of(context).textTheme.display1,
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: counter.increment,
tooltip: "Increment",
child: Icon(Icons.add),
),
);
}
}
第二个页面 demo2.dart
这个页面我们也导入了counter.dart,我们要的结果是第一个页面的数据变化了也影响这个页面,但是显然是不能的。因为store虽然是一个,但是实例化的时候是两个不同的,所以第一个页面的数据变化了也不会影响到这里。
怎么解决呢?我们可以使用之前提到的Provider去将Mobx与Flutter联系起来然后通过上下关系去的到我们想要的Store,例如final findStore = Provider.of
import "package:flutter/material.dart";
import "package:flutter_mobx/flutter_mobx.dart";
import "counter.dart"; // Import the Counter
final counter = Counter(); // Instantiate the store
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: "MobX",
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
const MyHomePage();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("MobX Counter"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
"第二个页面显示第一个页面的数是:",
),
Observer(
builder: (_) => Text(
"${counter.value}",
style: Theme.of(context).textTheme.display1,
),
),
],
),
),
);
}
}
公共的Store counter.dart
import "package:mobx/mobx.dart";
// Include generated file
part "counter.g.dart";
// This is the class used by rest of your codebase
class Counter = _Counter with _$Counter;
// The store-class
abstract class _Counter implements Store {
@observable
int value = 0;
@action
void increment() {
value++;
}
}
正确的使用方法
页面1-导航栏
页面2-内容
公共Store
将Mobx和Flutter联系起来
结束语感谢你的围观,目前是我写Flutter遇到的一些坑,欢迎大家一踩坑,大家有什么意见和建议都可以提出来,谢谢。
文章版权归作者所有,未经允许请勿转载,若此文章存在违规行为,您可以联系管理员删除。
转载请注明本文地址:https://www.ucloud.cn/yun/7292.html
摘要:昨天有个小学弟给我发来微信,说他现在有点后悔选择开发了,月月光不说,还加班特别严重,平时也没有属于自己的时间去学习,问我刚毕业的时候是不是这样。每天回到出租屋都是倒头就睡,非常累,也没有其他时间提升自己的技术。 昨天有个小学弟给我发来微信,说他现在有点后悔选择Android开发了,月月光不说...
摘要:前言最近比较热门,但是成体系的文章并不多,前期避免不了踩坑我这篇文章主要介绍如何使用实现一个比较复杂的手势交互,顺便分享一下我在使用过程中遇到的一些小坑,减少大家入坑作者链接先睹为快本项目支持运行,效果如下对了,顺便分享一下生成的小窍门,建 前言 Flutter最近比较热门,但是Flutter成体系的文章并不多,前期避免不了踩坑;我这篇文章主要介绍如何使用Flutter实现一个比较复杂...
摘要:前言最近比较热门,但是成体系的文章并不多,前期避免不了踩坑我这篇文章主要介绍如何使用实现一个比较复杂的手势交互,顺便分享一下我在使用过程中遇到的一些小坑,减少大家入坑作者链接先睹为快本项目支持运行,效果如下对了,顺便分享一下生成的小窍门,建 前言 Flutter最近比较热门,但是Flutter成体系的文章并不多,前期避免不了踩坑;我这篇文章主要介绍如何使用Flutter实现一个比较复杂...
阅读 1981·2019-08-30 15:54
阅读 3532·2019-08-30 15:52
阅读 1821·2019-08-29 17:20
阅读 2513·2019-08-29 17:08
阅读 2346·2019-08-26 13:24
阅读 780·2019-08-26 11:59
阅读 2780·2019-08-23 14:50
阅读 610·2019-08-23 14:20