Text是一个文本显示控件，用于在应用程序界面中显示单行或多行文本内容。
Text简单Demo
import 'package:flutter/material.dart';class MyTextDemo extends StatelessWidget {const MyTextDemo({super.key});@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text("My TEXT TEST")),extendBody: true,body: Column(children: [const Spacer(),Container(margin: const EdgeInsets.all(10),child: Center(child: Text("text one",style: TextStyle(fontSize: 28,fontStyle: FontStyle.italic,color: Colors.blue,letterSpacing: 2,wordSpacing: 10,fontFamily: 'Roboto'),textAlign: TextAlign.center,softWrap: true,overflow: TextOverflow.ellipsis,),),),const Spacer(),],),);}
}
重要属性
data
Text的默认构造函数中有一个必传的参数，且必须作为第一个传入的参数，类型是String，就是Text显示的文本。
const Text(String this.data, {super.key,this.style,this.strutStyle,this.textAlign,this.textDirection,this.locale,this.softWrap,this.overflow,@Deprecated('Use textScaler instead. ''Use of textScaleFactor was deprecated in preparation for the upcoming nonlinear text scaling support. ''This feature was deprecated after v3.12.0-2.0.pre.',)this.textScaleFactor,this.textScaler,this.maxLines,this.semanticsLabel,this.textWidthBasis,this.textHeightBehavior,this.selectionColor,}) style
Text默认样式是DefaultTextStyle类型。如果需要修改样式，可以通过style参数传入一个TextStyle类型的值。
@overrideWidget build(BuildContext context) { ...final DefaultTextStyle defaultTextStyle = DefaultTextStyle.of(context);...
} style: TextStyle(fontSize: 28,fontStyle: FontStyle.italic,color: Colors.blue,letterSpacing: 2,wordSpacing: 10,fontFamily: 'Roboto'),设置文本颜色
TextStyle(color: Colors.blue) 
设置文本背景颜色
style:TextStyle(backgroundColor: Colors.green)
设置文本字体大小
style: TextStyle(fontSize: 100)
设置文本加粗
style: TextStyle(fontWeight: FontWeight.bold) 
设置文本为斜体
style: TextStyle(fontStyle: FontStyle.italic)
设置文本之间的间隙
style: TextStyle(letterSpacing: 10,)
设置文本内单词间距
style: TextStyle(wordSpacing: 100)
设置文本行高
style: TextStyle(height: 10,)
设置文本阴影
style: TextStyle(shadows: [Shadow(color: Colors.black, offset: Offset(3, 2))])
设置文本内容删除线
style: TextStyle(decoration: TextDecoration.lineThrough, decorationColor: Colors.yellow,)
设置文本内容下划线
style: TextStyle(decoration: TextDecoration.underline, decorationColor: Colors.yellow,)
设置文本对齐方式
textAlign: TextAlign.center居中
设置文本换行
softWrap:true换行；false不换行；
import 'package:flutter/material.dart';class MyTextDemo extends StatelessWidget {const MyTextDemo({super.key});@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text("My TEXT TEST")),extendBody: true,body: Column(children: [const Spacer(),Container(margin: const EdgeInsets.all(10),child: Center(child: Text("text one texttexttexttexttexttexttexttexttexttexttexttexttext",style: TextStyle(fontSize: 50,fontStyle: FontStyle.italic,color: Colors.blue,backgroundColor: Colors.green,letterSpacing: 0,wordSpacing: 100,fontWeight: FontWeight.bold,fontFamily: 'Roboto',decoration: TextDecoration.underline, decorationColor: Colors.yellow,shadows: [Shadow(color: Colors.black, offset: Offset(3, 2))]),textAlign: TextAlign.center,maxLines: 3,softWrap: true,overflow: TextOverflow.ellipsis,),),),const Spacer(),],),);}
}
设置文本溢出
overflow: TextOverflow.ellipsis设置文本显示最大行数
maxLines: 3指定文本方向
textDirection: TextDirection.rtl富文本
import 'package:flutter/material.dart';class MyTextDemo extends StatelessWidget {const MyTextDemo({super.key});@overrideWidget build(BuildContext context) {return Scaffold(appBar: AppBar(title: const Text("My TEXT TEST")),extendBody: true,body: Column(children: [const Spacer(),Container(margin: const EdgeInsets.all(10),child: Center(// child: Text(// "text one texttexttexttexttexttexttexttexttexttexttexttexttext",// style: TextStyle(// fontSize: 50,// fontStyle: FontStyle.italic,// color: Colors.blue,// backgroundColor: Colors.green,// letterSpacing: 0,// wordSpacing: 100,// fontWeight: FontWeight.bold,// fontFamily: 'Roboto',// decoration: TextDecoration.underline,// decorationColor: Colors.yellow,// shadows: [// Shadow(color: Colors.black, offset: Offset(3, 2))// ]),// textAlign: TextAlign.center,// maxLines: 3,// softWrap: true,// overflow: TextOverflow.ellipsis,// textDirection: TextDirection.rtl),child: Text.rich(TextSpan(children: [TextSpan(text: "hhhhhhhhhhhhhhhhhhhhhhhh",style: TextStyle(color: Colors.red,fontSize: 18.0,fontWeight: FontWeight.w700)),TextSpan(text: "ooooooooooooooooooo",style: TextStyle(color: Colors.blue,fontSize: 24.0,fontWeight: FontWeight.w700)),TextSpan(text: "iiiiiiiiiiiiiiiiiiiiiiiiiii",style: TextStyle(decoration: TextDecoration.lineThrough,color: Colors.yellow,fontSize: 14.0)),TextSpan(text: "lllllllllllllllllllllllllll")]))),),const Spacer(),],),);}
}
