onChanged: (date) {
setState(() {
_selectedDate = date;
});
},
firstDate: DateTime(2021, 4, 3),
lastDate: DateTime(2021, 4, 31),
displayedMonth: DateTime(2021, 4),
),
)
效果图
三 CalendarDatePicker(代替DayPicker)
3.1 构造方法
CalendarDatePicker({
Key? key,
required DateTime initialDate,
required DateTime firstDate,
required DateTime lastDate,
DateTime? currentDate,
required this.onDateChanged,
this.onDisplayedMonthChanged,
this.initialCalendarMode = DatePickerMode.day,
this.selectableDayPredicate,
})
3.2 说明
-
CalendarDatePicker是用来替代DayPicker的
-
需要使用父容器如Flexible或者规定宽和高
3.3 示例
代码
DateTime _selectedDate = DateTime.now();
Text("CalenderDayPicker-示例"),
Flexible(
child: CalendarDatePicker(
initialDate: DateTime.now(),
firstDate: DateTime(2021, 4, 3),
lastDate: DateTime(2021, 04, 30),
onDateChanged: (date) {
_selectedDate = date;
},
selectableDayPredicate: (date) {
return date.difference(DateTime.now()).inMicroseconds < 0;
},
))
效果图
4.1 说明
-
MonthPicker跟DayPicker界面展示和属性功能基本一致
-
MonthPicker也是过时类，被CalendarDatePicker替代
4.2 示例
代码
Text("MonthPicker-示例"),
MonthPicker(
selectedDate: _selectedDate,
onChanged: (date) {
setState(() {
_selectedDate = date;
});
},
firstDate: DateTime(2020, 1),
lastDate: DateTime(2020, 12),
),
效果图
5.1 说明
-
YearPicker跟DayPicker的属性类似
-
YearPicker只有年份展示，并不包含月份和日期
5.2 示例
代码
Text("YearPicker"),
Flexible(
child: YearPicker(
selectedDate: _selectedDate,
onChanged: (date) {
setState(() {
_selectedDate = date;
});
},
dragStartBehavior: DragStartBehavior.start,
firstDate: DateTime(2000, 1),
lastDate: DateTime(2021, 12),
)),
效果图
6.1 说明
-
showDatePicker并不是一个新的控件 -
长跟按钮的点击事件连用，点击后弹出日期选择框
6.2 示例
代码
Text("showDatePicker"),
RaisedButton(child: Text("选择日期"),
onPressed: () async {
var result = await showDatePicker(
context: context,
initialDate: DateTime.now(),
firstDate: DateTime(2020),
lastDate: DateTime(2030));
print('$result');
},
)
效果图
示例2-设置主题(builder)
代码
RaisedButton(child: Text("选择日期"),
onPressed: () async {
var result = await showDatePicker(
builder: (context, child) {
return Theme(
data: ThemeData.dark(),
child: child,
);
},
context: context,
initialDate: DateTime.now(),
firstDate: DateTime(2020),
lastDate: DateTime(2030));
print('$result');
},
)
效果图
七 CupertinoDatePicker-仿IOS时间控件
7.1 示例
Text("IOS风格-时间控件"),
Flexible(child: CupertinoDatePicker(
use24hFormat: true,
initialDateTime: _selectedDate,
onDateTimeChanged: (date) {
setState(() {
_selectedDate = date;
});
},
))
效果图
8.1 说明
-
showDatePicker是点击后进行日期选择联动，showTimePicker是点击后进行时间选择联动
-
长跟按钮的点击事件连用，点击后弹出时间选择框
-
showTimePicker同showDatePicker可以设置深色主题
8.2 示例
代码
Text("showTimePicker"),
RaisedButton(child: Text("showTimePicker"),
onPressed: () async {
showTimePicker(
context: context,
initialTime: TimeOfDay.now(),
builder: (context, child) {
return MediaQuery(
data: MediaQuery.of(context)
.copyWith(alwaysUse24HourFormat: true),
child: child,
);
});
},
),
效果图
九 CupertinoTimerPicker -IOS时间选择器
9.1 示例
代码
Container(
height: 200,
child: CupertinoTimerPicker(
initialTimerDuration: Duration(
hours: _selectedDate.hour,
