在此之前，所有内容都在Container中，并且没有问题，但是动画出现了错误。谁可以提供帮助？）
return AnimatedContainer(
curve: Curves.easeInCirc,
duration: Duration(milliseconds: 200),
height: _heightWidget,
decoration: isTaped
? BoxDecoration(
border: Border(
bottom: BorderSide(
width: 0.0, color: Color.fromRGBO(131, 134, 163, 0.52)),
),
)
: BoxDecoration(
border: Border(
bottom: BorderSide(
width: 1.0, color: Color.fromRGBO(131, 134, 163, 0.52)),
),
),
child: Expanded(
child: Column(
children: <Widget>[
Row(
children: <Widget>[
Container(
height: 43.0,
width: 60.0,
color: widget.dateBackgroundColor != null
? widget.dateBackgroundColor
: Colors.green,
child: Center(
child: MaterialButton(
onPressed: () {
_pageController.previousPage(
duration: widget.pageChangeDuration != null
? widget.pageChangeDuration
: Duration(microseconds: 500),
curve: Curves.easeIn,
);
},
child: Icon(
widget.backwardIcon == null
? Icons.arrow_back
: widget.backwardIcon,
color: Colors.black,
),
),
),
),
Expanded(
child: Container(
height: 43.0,
color: widget.dateBackgroundColor != null
? widget.dateBackgroundColor
: Colors.red,
child: Padding(
padding: EdgeInsets.only(top: 0.0, bottom: 0.0),
child: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
GestureDetector(
onTap: () {
setState(() {
isTaped = !isTaped;
isTaped
? _heightWidget = 464.0
: _heightWidget = 44.0;
});
},
child: Row(
children: <Widget>[
Image.asset('assets/icons/calendar.png'),
SizedBox(
width: 10.0,
),
Text(
checkDateToday(DateFormat(
widget.displayDateFormat == null
? widget.displayDateFormat
: "dd.MM.yyyy")
.format(_selectedDate)),
style: widget.dateStyle != null
? widget.dateStyle
: TextStyle(
color: Colors.black,
fontSize: 14.0,
fontWeight: FontWeight.w100,
),
),
],
)),
],
)),
),
),
),
Container(
height: 43.0,
width: 60.0,
color: widget.dateBackgroundColor != null
? widget.dateBackgroundColor
: Colors.red,
child: Center(
child: MaterialButton(
onPressed: () {
_pageController.nextPage(
duration: widget.pageChangeDuration != null
? widget.pageChangeDuration
: Duration(milliseconds: 700),
curve: Curves.easeIn,
);
},
child: Icon(
widget.forwardIcon == null
? Icons.arrow_forward
: widget.forwardIcon,
color: Colors.black,
),
),
),
),
],
),
Container(
decoration: BoxDecoration(
border: isTaped
? Border(
top: BorderSide(
width: 1.0,
color: Color.fromRGBO(131, 134, 163, 0.52)),
)
: null,
),
padding: EdgeInsets.only(left: 0, right: 0),
child: isTaped
? Column(
children: <Widget>[
SizedBox(height: 12.0),
Container(
child: SizedBox(
height: 21.0,
child: GridView.count(
crossAxisCount: 7,
primary: false,
children: weekDaysOnTop,
)),
),
Row(
children: <Widget>[
Container(
margin: EdgeInsets.only(
left: 25, top: 10, bottom: 0),
child: Text(
_currentMonth,
style: TextStyle(
color: Color.fromRGBO(83, 83, 83, 1),
fontWeight: FontWeight.bold,
fontSize: 24.0,
),
)),
],
),
Container(
child: _calendarCarousel,
),
Row(
children: <Widget>[
Container(
margin: EdgeInsets.only(
left: 25, top: 10, bottom: 0),
child: Text(
_nextMonth,
style: TextStyle(
color: Color.fromRGBO(83, 83, 83, 1),
fontWeight: FontWeight.bold,
fontSize: 24.0,
),
)),
],
),
],
)
: null),
Expanded(
child: PageView.builder(
controller: _pageController,
scrollDirection: Axis.horizontal,
itemCount: _totalPages,
onPageChanged: (direction) => _onPageChange(direction),
itemBuilder: (context, index) {
return _buildPage(index);
})),
],
),
),
);
════════小部件库捕获到异常══════════════════════════════════ ═ 应用父数据时引发了以下断言： 错误使用ParentDataWidget。
ParentDataWidget Expanded（flex：1）希望将FlexParentData类型的ParentData应用于RenderObject，该对象已设置为接受不兼容类型BoxParentData的ParentData。
通常，这表示扩展窗口小部件的祖先RenderObjectWidget错误。通常，扩展小部件直接放置在Flex小部件内部。 令人讨厌的“扩展”目前位于“填充”小部件内。
接收到不兼容父数据的RenderObject的所有权链为： 列←展开←填充←DecoratedBox←ConstrainedBox←容器←AnimatedContainer←ScrollingDayCalendar←DecoratedBox←ConstrainedBox←⋯
答案 0 :(得分：0)
您不能在AnimatedContainer内部使用expanded，因为它是一个可扩展Row，Column或Flex子级的小部件，以便该子级填充可用空间。尝试在列内使用它。并用mainAxisSize: MainAxisSize.max