首先我们先来看下AppBar的源码,实现了PreferredSizeWidget类,我们可以知道这个类主要是控制AppBar的高度的,Scaffold脚手架里的AppBar的参数类型就是PreferredSizeWidget类型。 classAppBarextendsStatefulWidgetimplementsPreferredSizeWidget{ ... preferredSize = _PreferredAppBarSize(toolbarHeight, bottom?.preferredSize.height)...
解决办法1:去掉input内置padding 解决办法2:限制行数 maxLines只允许输入一行inputFormatters设置输入多少个字符 maxLines:1,inputFormatters:[LengthLimitingTextInputFormatter(12)] 完整代码 import'package:flutter/material.dart';import'package:flutter/rendering.dart';import'package:flutter/services.dart';import'../ser...
// 单独清除输入框内容 final VoidCallback onClear; // 清除输入框内容并取消输入 final VoidCallback onCancel; // 输入框内容改变 final ValueChanged onChanged; // 点击键盘搜索 final ValueChanged onSearch; @override _SAppBarSearchState createState() => _SAppBarSearchState(); @override Size get...
SearchAppBar组件完整代码: import'package:flutter/material.dart';import'package:supervision/common/utils/utils.dart';classSearchAppBarextendsStatefulWidget{finalFunction(String)?onChange;finalFunction(String)?onSearch;constSearchAppBar({Key?key,this.onChange,this.onSearch}):super(key:key);@overrideState<...
appBar: AppBar( title: Text('SearchBarDemo'), actions:<Widget>[ IconButton( icon: Icon(Icons.search), onPressed: (){ showSearch(context: context,delegate: SearchBarDelegate()); }, ) ], ), ); } } 在点击图标时执行SearchBarDelegate类,这个类继承与SearchDelegate类,继承后要重写里边的四个方法...
~/flutter/packages/flutter/lib/src/material/search.dart // 导入icon import 'package:flutter/material.dart'; // 修改源码 直接到文件末尾 return Semantics( explicitChildNodes: true, scopesRoute: true, namesRoute: true, label: routeName, child: Theme( data: theme, child: Scaffold( appBar: AppB...
我们通过定义一个扩展 ModalRoute 类的名为FullScreenSearchModal的类来创建完整模式。 main.dart中的完整源代码及说明: // 大前端之旅 // main.dart import 'package:flutter/material.dart'; void main() => runApp(const MyApp()); class MyApp extends StatelessWidget{ ...
this.appBar, // 应用栏,显示在顶部,包括其中的搜索框 this.body, // 页面的主题显示内容 this.floatingActionButton, // 设置显示在上层区域的按钮,默认位置位于右下角 this.floatingActionButtonLocation, // 设置floatingActionButton的位置 this.floatingActionButtonAnimator, // floatingActionButton动画 ...
DefaultTabController( length: 2, child: Scaffold( appBar: AppBar( centerTitle: true, title: const Text("AppBarDemoPage"), leading: IconButton( icon: const Icon(Icons.menu), onPressed: () { print(1244); }, ), actions: [ IconButton( onPressed: () {}, icon: const Icon(Icons.search...
import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar( title: Text('Flutter Custom Search Box'), ), body: Center( child: CustomSearchB...