title: Transitioning to a new child with a custom transition in Flutter
body: <p><a href="https://api.flutter.dev/flutter/widgets/AnimatedSwitcher-class.html" rel="nofollow noreferrer"><strong>AnimatedSwitcher</strong></a> is the basic version of what I want to achieve. When the child changes to a new child, the old one transitions out and the new one transitions in using the specified transition.</p>
  
  <p>However, I want the old child fade out and new child fade in to have different animations. Just as an example, I'd want to fade the old child to white (opacity 1 -> 0) in 1s and 0.5s in I want to start to fade in the new child (scale 0 -> 1).</p>
  
  <p><em>It doesn't really matter what the different transitions are, the goal is to switch to a new child (the old one is unloaded afterwards) and during the switch to animate both children in different ways.</em> </p>
  
  <p>I'm wondering how to properly achieve this and I'm stuck because I'm very new to Flutter and its Transitions.</p>