flutter 提示框2 Dialog

flutter 提示框 写在点击的方法体中

child里放自己喜欢的

        showDialog(  context: context,  builder: (BuildContext context) {  final Dialog alertDialog = Dialog(  backgroundColor: Colors.transparent,shadowColor:Colors.transparent,child: Container(height: mediawidth*0.25,width: mediawidth*0.5,decoration: BoxDecoration(// color: Colors.transparent,image: DecorationImage(  image: AssetImage('assets/images/choosed.png'),fit: BoxFit.contain, ),),),);  // 使用Future.delayed来在1秒后自动关闭对话框  Future.delayed(Duration(milliseconds: 700), () {  Navigator.of(context).pop();  });  return alertDialog;  },  );