这是我目前的设计：
我想实现这个设计：
正如您所看到的，容器从顶部开始，我想做的是像第二个屏幕截图一样将其居中。
这是我的代码：
import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:pomodoro/5.hourglass_animation/countdown_timer/responsive.dart';
class StartPomodoro extends StatefulWidget {
const StartPomodoro({super.key, });
//final DateTime end;
@override
State<StartPomodoro> createState() => _StartPomodoroState();
}
class _StartPomodoroState extends State<StartPomodoro>
with TickerProviderStateMixin {
final now = DateTime.now();
List<bool> isSelected = [true, false];
late Timer timer;
late AnimationController controller;
String get countText {
Duration count = controller.duration! * controller.value;
return controller.isDismissed
? '${controller.duration!.inHours.toString().padLeft(2, '0')}:${(controller.duration!.inMinutes % 60).toString().padLeft(2, '0')}:${(controller.duration!.inSeconds % 60).toString().padLeft(2, '0')}'
: '${count.inHours.toString().padLeft(2, '0')}:${(count.inMinutes % 60).toString().padLeft(2, '0')}:${(count.inSeconds % 60).toString().padLeft(2, '0')}';
}
double progress = 1.0;
bool LongBreak = true;
void notify() {
if (countText == '00:00:00') {}
}
@override
void initState() {
super.initState();
controller = AnimationController(
vsync: this,
duration: const Duration(seconds: 0),
);
controller.addListener(() {
notify();
if (controller.isAnimating) {
setState(() {
progress = controller.value;
});
} else {
setState(() {
progress = 1.0;
LongBreak = true;
});
}
});
}
@override
void dispose() {
controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
ThemeData themeData = Theme.of(context);
return SafeArea(
child: Scaffold(
backgroundColor:
LongBreak ? const Color(0xffD94530) : const Color(0xff6351c5),
body: GestureDetector(
onTap: () {
if (controller.isDismissed) {
showModalBottomSheet(
context: context,
builder: (context) => Container(
height: 300,
child: CupertinoTimerPicker(
initialTimerDuration: controller.duration!,
onTimerDurationChanged: (time) {
setState(() {
controller.duration = time;
});
},
),
),
);
}
},
child: AnimatedBuilder(
animation: controller,
builder: (context, child) {
return Stack(
children: <Widget>[
Align(
alignment: Alignment.bottomCenter,
child: Container(
color: const Color(0xffD94530),
height: controller.value *
MediaQuery.of(context).size.height *
0.722,
),
),
Spacer(),
Padding(
padding: const EdgeInsets.all(8.0),
child: Responsive(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Align(
alignment: Alignment.bottomCenter,
child: Align(
alignment: FractionalOffset.bottomCenter,
child: Padding(
padding: const EdgeInsets.symmetric(
vertical: 2.0, horizontal: 15.0),
child: Container(
width: MediaQuery.of(context).size.width,
height: 210,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color:
const Color(0xffFAFAFA)
),
child: Container(
padding: const EdgeInsets.all(20.0),
child: SingleChildScrollView(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
const Text(
"Hyper-focused on... (+add task)",
style: TextStyle(
fontSize: 22.0,
fontWeight: FontWeight.w500,
),
),
const SizedBox(height: 16),
Center(
child: SingleChildScrollView(
child: Column(
mainAxisAlignment:
MainAxisAlignment.center,
children: [
Row(
mainAxisAlignment:
MainAxisAlignment
.center,
children: [
Text(
countText,
style: const TextStyle(
fontWeight:
FontWeight.w600,
letterSpacing: 4,
fontSize: 65.0,
color:
Color(0xff3B3B3B),
),
),
],
),
Row(
mainAxisAlignment:
MainAxisAlignment
.center,
children: const [
Text(
' Hours Minutes Seconds ',
style: TextStyle(
fontWeight:
FontWeight.w500,
letterSpacing: 2,
fontSize: 20.0,
color:
Color(0xff3B3B3B),
),
),
],
),
],
),
),
),
],
),
),
),
),
),
),
),
Spacer(),
Responsive(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.stretch,
children: [
AnimatedBuilder(
animation: controller,
builder: (context, child) {
return Padding(
padding:
const EdgeInsets.symmetric(
vertical: 2.0,
horizontal: 15.0),
child:
FloatingActionButton.extended(
backgroundColor:
const Color(
0xffFAFAFA),
onPressed: () {
if (controller
.isAnimating) {
controller.stop();
setState(() {
LongBreak = false;
});
} else {
controller.reverse(
from: controller
.value ==
0
? 1.0
: controller
.value);
setState(() {
LongBreak = false;
});
}
},
icon: Icon(
controller.isAnimating
? Icons.pause
: Icons.play_arrow,
color: const Color(
0xff3B3B3B),
),
label: Text(
controller.isAnimating
? "Pause"
: "Start",
style: const TextStyle(
color: Color(
0xff3B3B3B)),
)),
);
}),
],
),
),
SizedBox(height: 10,),
],
),
),
),
],
);
}),
),
),
);
}
AnimationController _buildClockAnimation(TickerProvider tickerProvider) {
return AnimationController(
vsync: tickerProvider,
duration: const Duration(milliseconds: 750),
);
}
void _animateLeftDigit(
int prev,
int current,
AnimationController controller,
) {
final prevFirstDigit = (prev / 10).floor();
final currentFirstDigit = (current / 10).floor();
if (prevFirstDigit != currentFirstDigit) {
controller.forward();
}
}
}由于某种原因，我无法将 Package 了小部件的容器居中
center运气不好，我怎么能把计时器容器居中呢？
谢谢你能提供的任何帮助
2条答案
按热度按时间iswrvxsc1#
由于大量的代码和不正确的缩进，很难弄清楚完整的代码。但据我所知，您面临这个问题是因为使用
Spacer，Spacer正在将您的floating button和timer Container推到尽头。尝试删除
Spacer，然后用CenterPackagetimer Container，再用FlexiblePackage 它，这样应该可以解决您的问题。您目前的代码大致为：
将其更改为：
wbgh16ku2#
如果您喜欢使用
Stackwidget，请使用Stack上的Aling、Positioned等位置widget。根据您的UI，使用stack widget结构将这是完整的代码段，我删除了一些最小和填充小部件，以处理一些空间