17a80689
 liangchengyou
feat:倒计时功能开发
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import 'package:flutter/cupertino.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:wow_english/common/blocs/timerbloc/timer_bloc.dart';
import 'package:wow_english/common/extension/string_extension.dart';
import 'package:wow_english/common/widgets/timer_ticker.dart';
class TimerWidget extends StatefulWidget {
const TimerWidget({super.key, required this.canSendSms});
final bool canSendSms;
@override
State<StatefulWidget> createState() {
return _TimerWidgetState();
}
}
class _TimerWidgetState extends State<TimerWidget> {
late bool sendSmsIng;
@override
void initState() {
super.initState();
sendSmsIng = false;
}
@override
Widget build(BuildContext context) {
return BlocProvider(
create: (_) => TimerBloc(ticker: const TimerTicker()),
child: _buildCountdownWidget(),
);
}
Widget _buildCountdownWidget() => BlocBuilder<TimerBloc,TimerState>(
buildWhen: (prev, state) => prev.runtimeType != state.runtimeType,
builder: (context,state) {
final bloc = BlocProvider.of<TimerBloc>(context);
final duration = bloc.state.duration;
final secondsStr = (duration % 60).floor().toString().padLeft(2, '0');
if (state is TimerInitial) {
sendSmsIng = true;
} else {
sendSmsIng = false;
}
return GestureDetector(
onTap: () {
if (widget.canSendSms && !sendSmsIng) {
bloc.add(ResetEvent());
bloc.add(StartEvent(duration: bloc.state.duration));
}
},
child: Container(
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage(
widget.canSendSms?'securitycode'.assetPng:'securitycode_dis'.assetPng
),
fit: BoxFit.fill
),
),
padding: const EdgeInsets.symmetric(horizontal:12.0,vertical: 15.0),
child: Row(
children: [
if (state is TimerInitial)...[
const Text('获取验证码')
],
if (state is RunningState)...[
Text('${secondsStr}s倒计时')
],
if (state is FinishedState) ...[
const Text('获取验证码')
]
],
),
),
);
},
);
}
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