flutter on build complete

 void initState() {
    super.initState();
    WidgetsBinding.instance.addPostFrameCallback((_) => yourFunction(context));
  }

QUESTIONS: Flutter: Run method on Widget build complete

ANSWERS:

1) WidgetsBinding.instance.addPostFrameCallback((_) => yourFunc(context)); //Recomended

2) Future.delayed(Duration.zero, () => yourFunc(context));

3) Timer.run(() => yourFunc(context));