textPainter.layout(minWidth: textWidth, maxWidth: textWidth); } return textPainter.computeLineMetrics(); } bool _lenEquals(String text, int len) => _paintText(text).length == len; void _tapRecognizer() { setState(() => _isExpand = !_isExpand); if (_isExpand) { (widget.onShrink...
flutter计算文本内容行数 LayoutBuilder(builder:(BuildContext context,BoxConstraints constraints){finalspan=TextSpan(text:_textFieldController.text,style:TextStyle(color:Color(0xff222222),fontSize:28.w));finaltp=TextPainter(text:span,maxLines:2,textDirection:TextDirection.ltr);tp.layout(maxWidth:constrain...
TextField max length property and inputFormatters: [LengthLimitingTextInputFormatter(10)] not working.They can't limited text lenght.#65625 Closed sidrao2006mentioned this issueOct 6, 2020 darshankawarmentioned this issueOct 7, 2020 TextField with MaxLength (or any other TextInputFormatter) keeps in...
从狭义上来说,传统飞行力 expandText: '展开', collapseText: '隐藏', maxLines: 4, expandColor: Color(0xFFF22C2C), collapseColor: Color(0xff3970FB), expandImage: 'assets/image/down.png', collapseImage: 'assets/image/up.png', imageHeight: 15, imageWidth: 15, keywordColor: Colors.red, ...
大家在学习 Flutter 时一定会用过 Text,而对于一些复杂文本的处理可能会选择 RichText,再进一步,使用 RichText 就一定要用 TextSpan ,和尚本以为可以做为一个小知识点进行简单学习,但是随着深入尝试发现 TextSpan 涉及东西很多,很值得研究,因此单独整理一篇小博文。 RichText 富文本核心即 TextSpan,而 TextSpan 结构...
import'package:flutter/material.dart';voidmain()=>runApp(MyApp());classMyAppextendsStatelessWidget{@overrideWidgetbuild(BuildContextcontext) {returnMaterialApp( title:'Flutter Demo', home:Scaffold( body:Center( child:TextField( maxLength:5, ), ), ), ); } } ...
文字内容过多，超出盒子模型的内容显示为省略号。提示：无论是单行还是多行文本，都需要设置高度，行高，...
newText = maxValue.toString(); }returnTextEditingValue(text: newText, selection: newValue.selection); } } 通过TextInputFormatter我们可以很容易的实现各种格式化的工具,还有很多的功能大家可以自行探索。 自定义文本选中范围 自定义文本可以很大程度上提高用户的体验(前提是处理好的情况下),例如在一段长文本中...
LengthLimitingTextInputFormatter(11) ], /// 白名单校验 inputFormatters: [BlacklistingTextInputFormatter(RegExp("[0-9]"))], Button Button的通用属性 代码语言:txt 复制 RaisedButton( child: Text('凸起按钮'), onPressed: (){}, color: Colors.blue[200], ...
_temLines = _checkOverMaxLines02(widget.maxWidth)?.length; return (_temLines <= _maxLines) ? _itemText() : Stack(children: <Widget>[_itemText(), _moreText()]); }); _moreText() => Positioned( bottom: 0, right: 0, child: GestureDetector( ...