其实它的实现逻辑和DropdownButton差不多,都是使用了PopupRoute, 有对这方面感兴趣的同学,可以查看我以前写的文章:Flutter 源码系列:DropdownButton 源码浅析 References [1]onSelected:https://api.flutter.dev/flutter/material/PopupMenuButton/onSelected.html [2]onSelected:https://api.flutter.dev/flutter/mate...
Flutter超实用简单菜单弹出框PopupMenuButton功能
以下是一个简单的示例,展示了如何改变PopupMenuItem的背景色: 代码语言:txt 复制 import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar(...
which is not inside your current Flutter SDK checkout at /Users/vlados/fvm/versions/3.27.1. Consider adding /Users/vlados/fvm/versions/3.27.1/bin to the front of your path.• Upstream repository https://github.com/flutter/flutter.git• Framework revision 17025dd882 (22 часаназ...
Steps to reproduce The CupertinoSheetRoute when used in combination with PopupMenuButton, results in an error. Copy and paste the example code below, which is a minimally modified version of the official example from the Flutter document...
PopupMenuButton item点击方法 flutter 本篇主要包括: ■ Page Header■ Breadcrumbs ■ Button Groups ■ Dropdowns ■ Button Dropdowns ■ 用Button和Dropdowns模拟Select ■ Input Groups ■ Thumbnails ■ Panels ■ Wells □ Page Header Page Header是指页面最顶部。
可以使用Flutter的调试工具来查看数据源是否成功加载,并且数据项是否包含所需的项目。 检查选中值:确认所选值是有效的,并且它存在于数据源中。你可以通过打印选中值的方式来验证。 检查控件属性:确保DropdownMenu的value属性与选中值匹配,并且items属性包含正确的数据项。你可以尝试在初始状态下将value属性设置为数据源...
(R.id.popup_menu_item_invite_people, "Invite people"), PopupMenuItem(R.id.popup_menu_item_refresh_page, "Refresh page"), PopupMenuItem(R.id.popup_menu_item_open_in_browser, "Open in browser"), PopupMenuItem(R.id.popup_menu_item_multiline, "This is a multiline popup menu. Max ...
如何控制只在Web组件第一次加载url的时候触发onPageBegin,onPageEnd 如何实现Web和Webview对前端常用框架(如Vue,React)的适配 如何在Web请求时添加header头 Web组件对H5页面、常用框架VUE、React的页面支持情况,包括本地和网络端的页面 Web组件如何访问本地的资源文件,并添加查询参数 如何判断Web滑动到了顶部...
/*#region MasterPage:Menu*/ .Menu{ /*background-color:Orange;*/ /*margin:2em 0 0 5em;*/ } .StaticMenu{ /*background-color:Green;*/ } .StaticMenuItem{ color:Black; background-color:#F7F7F7; border:1px solid gray; border-bottom:0; ...