1、一个圆，裁剪出一段圆border   ClipOval(child:Container(width:56,height:56,alignment:Alignment.center,decoration:BoxDecoration(border:Border.all(color:Colors.red,width:1),borderRadius:BorderRadius.all(Radius.circular(28)),),child:Container(),),clipper:MyClipper1(),);classMyClipper1extendsCustomClippe...