LifecycleObserver class

Inheritance
Mixed-in types
Available extensions

Constructors

LifecycleObserver()
Avoids calling this constructor in build method. Call dispose when it will never be used, e.g. call it in State#dispose.
LifecycleObserver.internalGet(BuildContext context)
Only for internal usage.
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
The navigator that the observer is observing, if any.
no setterinherited
rootRoute → Route?

Available on LifecycleObserver, provided by the LifecycleObserverExtensions extension

根Route
no setter
rootStack → List<Route>

Available on LifecycleObserver, provided by the LifecycleObserverExtensions extension

堆栈
no setter
routeStack → List<Route>

Available on LifecycleObserver, provided by the LifecycleObserverExtensions extension

堆栈
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
topRoute → Route?

Available on LifecycleObserver, provided by the LifecycleObserverExtensions extension

栈顶route
no setter

Methods

didChangeAccessibilityFeatures() → void
Called when the system changes the set of currently active accessibility features.
inherited
didChangeAppLifecycleState(AppLifecycleState state) → void
Called when the system puts the app in the background or returns the app to the foreground.
override
didChangeLocales(List<Locale>? locales) → void
Called when the system tells the app that the user's locale has changed. For example, if the user changes the system language settings.
inherited
didChangeMetrics() → void
Called when the application's dimensions change. For example, when a phone is rotated.
inherited
didChangePlatformBrightness() → void
Called when the platform brightness changes.
inherited
didChangeTextScaleFactor() → void
Called when the platform's text scale factor changes.
inherited
didChangeTop(Route topRoute, Route? previousTopRoute) → void
The top most route has changed.
inherited
didChangeViewFocus(ViewFocusEvent event) → void
Called whenever the PlatformDispatcher receives a notification that the focus state on a view has changed.
inherited
didHaveMemoryPressure() → void
Called when the system is running low on memory.
inherited
didPop(Route route, Route? previousRoute) → void
The Navigator popped route.
override
didPopRoute() → Future<bool>
Called when the system tells the app to pop the current route, such as after a system back button press or back gesture.
inherited
didPush(Route route, Route? previousRoute) → void
When boot first page, previousRoute is null.
override
didPushRoute(String route) → Future<bool>
Called when the host tells the application to push a new route onto the navigator.
inherited
didPushRouteInformation(RouteInformation routeInformation) → Future<bool>
Called when the host tells the application to push a new RouteInformation and a restoration state onto the router.
inherited
didRemove(Route route, Route? previousRoute) → void
route Route that will be removed. previousRoute A route below the removed route. When removing multiple routes, the previousRoute is unchanged, and may be null.
override
didReplace({Route? newRoute, Route? oldRoute}) → void
The Navigator replaced oldRoute with newRoute.
override
didRequestAppExit() → Future<AppExitResponse>
Called when a request is received from the system to exit the application.
inherited
didStartUserGesture(Route route, Route? previousRoute) → void
The Navigator's routes are being moved by a user gesture.
inherited
didStopUserGesture() → void
User gesture is no longer controlling the Navigator.
inherited
dispose() → void
Must be called when the observer will no longer be used.
findRoute(String routeName) → Route?
Finds route by routeName.
handleCancelBackGesture() → void
Called when a predictive back gesture is canceled, indicating that no navigation should occur.
inherited
handleCommitBackGesture() → void
Called when a predictive back gesture is finished successfully, indicating that the current route should be popped.
inherited
handleStartBackGesture(PredictiveBackEvent backEvent) → bool
Called at the start of a predictive back gesture.
inherited
handleStatusBarTap() → void
Called when the user taps the status bar on iOS, to scroll a scroll view to the top.
inherited
handleUpdateBackGestureProgress(PredictiveBackEvent backEvent) → void
Called when a predictive back gesture moves.
inherited
iterateRoutes(bool callback(Route route)) → void
Iterates routes. It's usually used for locating a specific route. callback The callback function to be called for each route. Returns true to break the iteration.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
removeNamed<T>(String routeName, [T? result]) → void
Remove a route according to the routeName.
removeRoute<T>(Route route, [T? result]) → void
Removes a route.
subscribe(LifecycleAware lifecycleAware, Route route) → void
lifecycleAware subscribes events.
toString() → String
A string representation of this object.
inherited
unsubscribe(LifecycleAware lifecycleAware) → void
lifecycleAware unsubscribes events.

Operators

operator ==(Object other) → bool
The equality operator.
inherited