When you write MyAnimatedWidget() in your code, this means that you initiate a new instance of widget again that’s why the old one is getting disposed because it isn’t used anymore. You can create a field of type MyAnimatedWidget() inside your class and return it with the opacity or not .
Read moreWhen should we use dispose?
The dispose pattern is used for objects that implement the IDisposable interface, and is common when interacting with file and pipe handles, registry handles, wait handles, or pointers to blocks of unmanaged memory . This is because the garbage collector is unable to reclaim unmanaged objects.
Read moreWhy in it dispose is used flutter?
We uses dispose() method in order to stop/avoid memory linkage when state object is removed from the widget tree .
Read moreHow do you dispose of ticker flutters?
All Tickers must be disposed before calling super. dispose(). Tickers used by AnimationControllers should be disposed by calling dispose() on the AnimationController itself . Otherwise, the ticker will leak.
Read moreWhat are all the lifecycle of a StatefulWidget?
The lifecycle has the following simplified steps: createState() mounted == true . initState()
Read moreWhat is mounted in Flutter?
mounted property Null safety After creating a State object and before calling initState, the framework “mounts” the State object by associating it with a BuildContext . The State object remains mounted until the framework calls dispose, after which time the framework will never ask the State object to build again.
Read moreWhy we use mounted in Flutter?
The mounted property helps to avoid the error, when you trying to call setState before build . you don’t need a boolean operator to check a boolean value.3 Şub 2019
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