Как быть когда пытаешься вызвать новую страницу в то время когда текущая страница ещё не дорисовалась?
Получаю ошибку и сообщение...
The following assertion was thrown while notifying status listeners for AnimationController:
setState() or markNeedsBuild() called during build.
This Overlay widget cannot be marked as needing to build because the framework is already in the
process of building widgets. A widget can be marked as needing to be built during the build phase
only if one of its ancestors is currently building. This exception is allowed because the framework
builds parent widgets before children, which means a dirty descendant will always be built.
Otherwise, the framework might not visit this widget during this build phase.
Можно как-то отследить, что страница уже отрисовалась?