安溪网站开发今日疫情最新数据

flutter开发实战-当前界面无操作60s返回主页实现

当前界面无操作60s返回主页实现，主要是通过Timer来控制，当监听界面是否有pointerDown时候，如果超过60s仍没有操作，则返回主页。

一、Listener

Listener是用来用于调用回调以响应常见的指针事件
Listener的属性如下

const Listener({super.key,this.onPointerDown,this.onPointerMove,this.onPointerUp,this.onPointerHover,this.onPointerCancel,this.onPointerPanZoomStart,this.onPointerPanZoomUpdate,this.onPointerPanZoomEnd,this.onPointerSignal,this.behavior = HitTestBehavior.deferToChild,super.child,}) : assert(behavior != null);

可以看出，我们可以通过onPointerDown来判断用户是否触摸到屏幕。

二、新增ListenerTouchTimerWrapper

为Widget添加Timer控制，当触摸了屏幕，取消Timer，重新倒计时。倒计时结束之后，可以执行callback。

void updateTouch() {_timer?.cancel();if (timeoutCallback != null) {_timer = Timer(Duration(milliseconds: milliseconds), timeoutCallback!);}}

完整代码如下

class ListenerTouchTimer {final int milliseconds;Timer? _timer;VoidCallback? timeoutCallback;ListenerTouchTimer({required this.milliseconds,});void startListener({required VoidCallback timeoutCallback}) {this.timeoutCallback = timeoutCallback;updateTouch();}void updateTouch() {_timer?.cancel();if (timeoutCallback != null) {_timer = Timer(Duration(milliseconds: milliseconds), timeoutCallback!);}}void dispose() {_timer?.cancel();}
}

为widget创建Wrapper

/// 无操作回主页
class ListenerTouchTimerWrapper extends StatelessWidget {const ListenerTouchTimerWrapper({super.key,required this.child,this.listenerTouchTimer,});final Widget child;final ListenerTouchTimer? listenerTouchTimer;@overrideWidget build(BuildContext context) {return Listener(onPointerDown: (event) {if (listenerTouchTimer != null) {listenerTouchTimer!.updateTouch();}},child: child,);}
}

三、使用ListenerTouchTimerWrapper

在界面的外层使用ListenerTouchTimerWrapper进行包裹一下。

class DemoPage extends StatefulWidget {const DemoPage({Key? key,required this.arguments,}) : super(key: key);final Map<String, dynamic> arguments;@overrideState<DemoPage> createState() => _DemoPageState();
}class _DemoPageState extends State<DemoPage> {/// 超出60秒自动返回首页ListenerTouchTimer? listenerTouchTimer;@overridevoid initState() {// TODO: implement initStategetAppConfigFromNative();listenerTouchTimer = ListenerTouchTimer(milliseconds: 6000);super.initState();loggerInfo("ChangeClothe initState");if (listenerTouchTimer != null) {listenerTouchTimer!.startListener(timeoutCallback: () {print("_ChangeClotheWaitPageState 超出60秒自动返回首页");if (mounted ) {navigatorBack();}});}}@overridevoid dispose() {// TODO: implement disposeloggerInfo("ChangeClothe dispose");listenerTouchTimer?.dispose();super.dispose();}@overrideWidget build(BuildContext context) {return ListenerTouchTimerWrapper(listenerTouchTimer: listenerTouchTimer,child: Scaffold(body: Container(),),);}void navigatorBack() {NavigatorPageRouter.pop();}
}

四、小结

flutter开发实战-当前界面无操作60s返回主页实现

学习记录，每天不停进步。