setState method Null safety Notify the framework that the internal state of this object has changed. Whenever you change the internal state of a State object, make the change in a function that you pass to setState: setState(() { _myState = newValue; }); The provided callback is immediately called synchronously.
Read moreHow do you set a state in flutter?
setState method Null safety Notify the framework that the internal state of this object has changed. Whenever you change the internal state of a State object, make the change in a function that you pass to setState: setState(() { _myState = newValue; }); The provided callback is immediately called synchronously.
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
Read moreWhat is void initState () in Flutter?
initState() is a method of class State and it is considered as an important lifecycle method in Flutter. initState() is called only Once and we use it for one time initializations. Example : To initialize data that depends on the specific BuildContext . To initialize data that needs to executed before build() .
Read moreWhat is the use of didChangeDependencies in Flutter?
According to the Flutter official docs, didChangeDependencies() is called when a dependency of the State object changes or immediately after initState() . It is safe to call BuildContext.
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