YYDialog().build(context)
 ..width = 220
 ..borderRadius
 ..text(
 padding: EdgeInsets.all(25.0),
 alignment: Alignment.center,
 text: doubtStr,
 color: Colors.black,
 fontSize: 17.0,
 fontWeight: FontWeight.w500,
 )
 ..divider()
 ..doubleButton(
 padding: EdgeInsets.only(top: 10.0),
 gravity: Gravity.center,
 withDivider: true,
 text1: "取消",
 color1: Colors.blue,
 fontSize1: 14.0,
 fontWeight1: FontWeight.bold,
 onTap1: cancelTop,
 text2: "确定",
 color2: Colors.redAccent,
 fontSize2: 14.0,
 fontWeight2: FontWeight.bold,
 onTap2: () {
 Navigator.of(context).pushAndRemoveUntil(
 MaterialPageRoute(builder: (context) => LoginPage()),
 (route) => route == null);
 });
 },
 )
 ..show();