flutter日期选择器 flutter时间选择器

 //设置默认显示的日期为当前
 DateTime initialDate = DateTime.now();
 
 void showDefaultYearPicker(BuildContext context) async {
  final DateTime dateTime = await showDatePicker(
   context: context,
   //定义控件打开时默认选择日期
   initialDate: initialDate,
   //定义控件最早可以选择的日期
   firstDate: DateTime(2018, 1),
   //定义控件最晚可以选择的日期
   lastDate: DateTime(2022, 1),
   builder: (BuildContext context, Widget child) {
    return Theme(
     data: CommonColors.themData,
     child: child,
    );
   },
  );
  if (dateTime != null && dateTime != initialDate) {}
 }

 //设置显示显示的时间为当前
 TimeOfDay initialTime = TimeOfDay.now();
 void showDefaultDatePicker(BuildContext context) async {
  final TimeOfDay timeOfDay = await showTimePicker(
   context: context,
   initialTime: initialTime,
   builder: (BuildContext context, Widget child) {
    return Theme(
     data: CommonColors.themData,
     child: child,
    );
   },
  );
  if (timeOfDay != null && timeOfDay != initialTime) {
   setState(() {
    initialTime = timeOfDay;
   });
  }
 }