import 'package:flutter/material.dart';void main() {runApp(MyApp());}class MyApp extends StatelessWidget {@overrideWidget build(BuildContext context) {return MaterialApp(home: Scaffold(appBar: AppBar(title: Text('PopupMenuButton Example')),body: Center(child: PopupMenuButton<String>(itemBuilder:...
There are functions which create and show popup routes. For example:showDialog,showMenu, andshowModalBottomSheet. These functions return their pushed route's Future as described above. Callers can await the returned value to take an action when the route is popped, or to discover the route's v...
1、添加gzx_dropdown_menu package 打开pubspec.yaml文件 添加如下代码 gzx_dropdown_menu : git: url: https://github.com/GanZhiXiong/gzx_dropdown_menu.git 1. 2. 3. 添加位置如下图所示 添加后打开Terminal,执行flutter packages get 2、使用 打开本仓库example项目下的gzx_dropdown_menu_test_page.dart...
Flutter’s profile mode compiles and launches your application almost identically to release mode, but with just enough additional functionality to allow debugging performance problems. For example, profile mode provides tracing information to the profiling tools. Flutter 的profile模式编译和启动你的app几乎...
PopupMenuButton 菜单按钮 PopupMenuButton({ Key? key, required this.itemBuilder, // itemBuilder this.initialValue, // 初识选中值 this.onSelected, // 选中某项后回调,参数为选中值 this.onCanceled, // 取消后回调 this.tooltip, this.elevation, this.padding = const EdgeInsets.all(8.0), this....
DefaultPlatformMenuDelegate是Flutter中用于处理平台菜单的默认委托。它是一个抽象类,提供了基本的菜单构建方法。该委托用于构建与平台相关的菜单,并处理所选菜单项的回调。当应用程序在不同的平台上运行时,该委托根据具体平台提供不同的菜单,以确保用户能够获得与平台一致的菜单体验。该委托还允许自定义特定平台的菜单...
Adding example for migrating to navigation drawer by @leighajarett in #128295Fix Null check operator used on a null value on TextField with contextMenuBuilder by @fzyzcjy in #128114Remove textScaleFactor dependent logic from AppBar by @LongCatIsLooong in #128112...
showCupertinoModalPopup在线查看 showDatePicker在线查看 showDialog在线查看 showGeneralDialog在线查看 showLicensePage在线查看 showMenu在线查看 showModalBottomSheet在线查看 showSearch在线查看 showTimePicker在线查看 Flutter Widgets PDF 开源文件为markdown格式,为了方便阅读老孟转换成了 PDF 格式,总计 658页,不知不觉已经...
example.png Flutter安装目录的flutter文件下找到flutter_console.bat example1.png 注意点: 官网下载flutter包完成将安装包zip解压到你想安装Flutter SDK的路径(如:C:\src\flutter;注意,不要将flutter安装到需要一些高权限的路径如C:\Program Files\)。 安装完成后-需要安装as(Android studio) 运行flutter doctor 检...
浮层的显示核心是_contextMenuController.show方法,其中需要传入contextMenuBuilder回调构建组件进行显示。菜单组件的构建依然通过AdaptiveTextSelectionToolbar来完成,其中anchors作为锚点确定浮层的位置。 代码语言:javascript 复制 void_onSecondaryTapUp(TapUpDetails details){_show(details.globalPosition);}void_show(Offset...