var url = '要访问的网址'; var dio = Dio(); //配置请求代理 (dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (HttpClient client) { client.findProxy = (uri) { ...

MaterialColor createMaterialColor(Color color) { List strengths = <double>[.05]; Map<int, Color> swatch = <int, Color>{}; final int r = color.red, g = color.green...

showDialog(context: context, barrierDismissible: false,//设置为false，点击空白处弹窗不关闭 builder: (context){ return new AlertDialog( content: Text('msg'), actions: <Widget>...

安装依赖： pub地址：https://pub.dev/packages/flutter_screenutil github地址：https://github.com/OpenFlutter/flutter_screenutil dependencies: flutter_screenutil: ^5.5.2 #屏幕适配 使...

说明： 该控件通常用于长布局的滚动。它只能包含一个子项，通常只应在期望的内容不会超过屏幕太多时使用，因为它不支持基于Sliver的延迟实例化模型，所以包含的长布局超出屏幕尺寸太多时，性能...

import 'package:flutter/material.dart'; /// 隐藏水波纹配置 class NoShadowScrollBehavior extends ScrollBehavior { Widget buildViewportChrome( BuildContext context, Widget child, Axi...

安装库 dependencies: badges: ^2.0.2 引入  import 'package:badges/badges.dart'; 使用 Badge( badgeContent: Text('3'), child: Icon(Icons.settings), ) 示例图： BadgeAnimationType.slid...

showDialog( context: context, barrierDismissible: false,//点击外部遮罩区域是否可以关闭dialog builder: (context) { return WillPopScope( onWillPop: () async => false,//关键代码 ch...

Switch [普通开关] Switch为material风格的开关组件，基本用法如下： var _switchValue = false; _buildSwitch(){ return Switch( value: _switchValue, onChanged: (value){ setState(() { _sw...

AutomaticKeepAliveClientMixin mixin 对于一些StatefulWidget，我们需要在界面切换时需要保持StatefulWidget的状态。这时就要在StatefulWidget对应的State中混入AutomaticKeepAliveClientMixin...