Container 圆角``` Container( decoration:BoxDecoration( borderR

圆角

Container(
  decoration:BoxDecoration(
    borderRadius:BorderRadius.all(Radius.circular(4)),//四周圆角
    borderRadius:BorderRadius.vertical(top:Radius.circular(27)),//上面圆角
  ),
 ),

边框

Container(
 decoration:BoxDecoration(
  border: Border(//单个边框设置
    bottom: BorderSide(width: 2)
  )
 ),
)

Container(
 decoration:BoxDecoration(
  border: Border.all(//边框设置
    width: 2
  ),
)