WebFeb 1, 2024 · You shouldn't pass the IconData as String. You're probably passsing it as. child: Icon( "widget.icon", //remove the quotes or any string interpolation size: 16.0, ), This is the correct way to use the icon. ... Unhandled Exception: type 'Future' is not a subtype of type 'String' : Flutter Exception. Hot Network Questions WebMar 30, 2024 · toString method - IconData class - widgets library - Dart API description toString method Null safety @ override String toString ( ) override A string representation of this object. Some classes have a default textual representation, often paired with a static parse function (like int.parse ).
dart - passing string as FontAwesomeIcons - Stack Overflow
WebDec 20, 2024 · Text widget doesn't take null value and in your snippet label is defined as nullable final String? label.It is possible to have null for label which violet the Text widget requirement.. const Text( String this.data, { ....}) @NirmalCode answer is ok, but I'm explaining to it why you need it. You can provide default value while it will be null like … WebJul 22, 2024 · Instead, you can directly use item.icon as an Icon widget. return Row ( mainAxisAlignment: MainAxisAlignment.start, children: [ item.icon , SizedBox (width: 8), Text ( item.header, style: MainTheme.lightTheme.textTheme.headline2, ) ], ); Share Improve this answer Follow edited Jul 22, 2024 at 5:58 answered Jul 22, 2024 at 5:53 chromis pos adjust margin ticket
【Flutter】底部导航栏页面框架 ( BottomNavigationBar 底部导航 …
WebNov 15, 2024 · Flutter's Icons class gets its icons from MaterialFonts like this: IconData icon = IconData (0xea00, fontFamily: 'MaterialIcons') That hex number is the Unicode codepoint for the glyph in the font. You could use a Map to map your json icon String value to the codepoint int you want it to represent. For example: WebAug 29, 2024 · In your case you could use the IconData values (codePoint, {this.fontFamily, this.fontPackage, this.matchTextDirection}) you require instead of the IconData object itself. In you UI (or elsewhere) you could then use this object and reconstruct the IconData. Or you have to write to- and from-JSON-methods by your own. WebMar 28, 2024 · 实现顶部导航栏需要三个组件 : TabBar : 该组件就是导航栏组件 , 设置多个图标按钮 ; TabBarView : 该组件是被导航的组件 , 设置多个布局结构 , 同时只能显示一个 ; DefaultTabController : 该组件用于关联控制 TabBar 和 TabBarView 组件 ; 界面组件中 , 根组件肯定是 MaterialApp ... chromis ovalis