Flutter-Directionality

Directionality

介绍:用于确定文本和文字方向
继承关系:

 Object > Diagnosticable > DiagnosticableTree > Widget > ProxyWidget > InheritedWidget > Directionality

构造函数:

Directionality({Key key, @required TextDirection textDirection, @required Widget child })

常用属性:

textDirection → TextDirection  设置文本方向
1、ltr → const TextDirection 从左到右
2、rtl → const TextDirection 从右到左

示例:

 @override
  Widget build(BuildContext context) {
    return
       Container(
         padding: EdgeInsets.fromLTRB(0.0, 50.0, 0.0, 0.0),
         color: Colors.white,
              child: Directionality(
                  textDirection: TextDirection.rtl,// TextDirection.ltr
                  child: Text('演示Directionality',style: TextStyle(fontSize: 12.0),)));

  }

效果:

image.png image.png

备注:文本下边的黄线是因为没有添加脚手架,缺少主题;