All 7 Hero Animations & Page Transitions questions
More in Hero Animations & Page Transitions
What is a Hero animation in Flutter, and how does it create that genuinely popular smooth visual effect of a specific widget appearing to fly smoothly from one screen directly across to a corresponding matching widget on an entirely different screen? How does the tag property on a Hero widget genuinely and uniquely identify exactly which specific widget on one screen properly corresponds to a genuinely matching widget on an entirely different destination screen? How can you properly customize a Hero animation's own specific flight path and behavior using a custom flightShuttleBuilder, rather than simply relying entirely on Flutter's own default built in animation behavior? How can you properly combine a Hero animation together with a custom page transition, ensuring both effects genuinely work correctly together as one single unified, seamless overall screen transition experience? How do you properly handle a Hero animation across a Navigator that genuinely spans several separate nested distinct navigators, such as one genuinely used together with a bottom tab bar navigation structure? What performance considerations become genuinely important when a Hero animation involves a genuinely very large or complex specific widget, such as a high resolution image or a genuinely complex custom painted graphic?
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How do you properly create a genuinely fully custom page transition animation in Flutter, beyond simply relying entirely on the platform's own default built in slide or fade transition, using PageRouteBuilder?

Intermediate

Answer

PageRouteBuilder lets you define a genuinely fully custom page transition animation by providing your own specific transitionsBuilder function, which receives the current in progress animation value and returns exactly how the incoming new page should actually be genuinely visually presented throughout that specific transition, letting you implement genuinely creative custom effects such as a smooth scale transition, a subtle rotation effect, or a genuinely combined fade together with slide effect, rather than simply relying entirely on the platform's own default built in transition behavior for every single one of your app's screens.
PageRouteBuilder(
  pageBuilder: (context, animation, secondaryAnimation) => DetailScreen(),
  transitionsBuilder: (context, animation, secondaryAnimation, child) {
    return FadeTransition(opacity: animation, child: child);
  },
)
Real-world example A photography portfolio app uses a genuinely fully custom PageRouteBuilder to smoothly fade in each new destination screen rather than using the platform's own default built in sliding transition, achieving a considerably more genuinely elegant, distinctive feel specifically matching their own particular brand's visual style.

Common follow-ups: How does a fully custom PageRouteBuilder genuinely interact with any Hero animations that might also genuinely be present on that exact same specific screen transition?;What is the specific practical difference between the primary animation and the secondaryAnimation parameters?

Navigation & Routing in Flutter;Flutter Animations Basics
All 7 Hero Animations & Page Transitions questions