下面是右侧选择图标的 DropdownMenu 组件构建逻辑,其中 requestFocusOnTap: 点击时是否获取焦点,置为 true 在移动端上会弹出软键盘,桌面端无法输入。 enableFilter: 弹出菜单项是否以当前内容搜索,如果为 true, 会因为过滤使得菜单响应减少。 代码语言:javascript ...
appBar: AppBar(title: const Text('DropdownMenu Sample')), body: const Center( child: DropdownMenuExample(), ), ), ); } } typedef MenuEntry = DropdownMenuEntry<String>; class DropdownMenuExample extends StatefulWidget { const DropdownMenuExample({super.key}); @override State<DropdownMenu...
import'package:flutter_down_menu/flutter_down_menu.dart'; 设置2: DropDownMenuHeader和DropDownMenu或MenuList需要一起使用。具体用法请参见下面的示例代码。 示例代码 import'package:flutter/material.dart';import'package:flutter_down_menu/flutter_down_menu.dart'asm;import'package:flutter_down_menu/flutter...
import'package:flutter/material.dart';import'package:customizable_dropdown_menu/customizable_dropdown_menu.dart';voidmain(){runApp(MyApp());}classMyAppextendsStatelessWidget{@overrideWidgetbuild(BuildContextcontext){returnMaterialApp(home:Scaffold(appBar:AppBar(title:Text('Customizable Dropdown Menu Exampl...
Steps to reproduce I get this issue with flutter 3.29.0, with the 3.27.1 it work fine. The relative DropdownMenu's TextField seems to get focus and lose it right away, you can also replicate this on the flutter DropdownMenu example here...
flutter 动态生成DropdownMenuItem flutter 动态化 一、前言 Flutter 跨端技术一经推出便在业内赢得了不错的口碑,它在“多端一致”和“渲染性能”上的优势让其他跨端方案很难比拟。虽然 Flutter 的成长曲线和未来前景看起来都很好,但不可否认的是,目前 Flutter 仍处在发展阶段,很多大型互联网企业都无法毫无顾虑地...
Flutter DropdownMenuItem是Flutter框架中的一个小部件,用于在下拉菜单中显示选项。它通常与DropdownButton小部件一起使用,用于创建一个下拉菜单,用户可以从中选择一个选项。 要迭代DropdownMenuItem,可以使用Dart语言中的循环结构,如for循环或forEach方法。以下是一个示例代码,演示如何使用for循环迭代创建DropdownMenuItem...
DropdownMenuItem( value: ProductSortType.price, child: Icon(Icons.sort), ), ], ), ], ), body: ListView.builder( // ... ), ); } 现在我们有了一个dropdown,让我们创建一个StateProvider并将dropdown的状态与我们的StateProvider同步。首先,让我们创建StateProvider。
( DropdownMenuItem<T>( child: Container( width: widget.width - (widget.operIconSize + leftPadding), child: Text( _m[widget.reference.showContent], textAlign: type == RENDERTYPE.SELECTEDECHO ? _rTextAlign(widget.alignments ?? ALIGNMENT.LEFT) : null, overflow: type == RENDERTYPE.SELECTED...
Steps to reproduce Create a DropdownMenu Provide DropdowmMenuEntries and initialSelection Update the DropdownMenu with different label to the corresponding entry to the initalSelection Expected results The DropdownMenu should reflect the...