CustomScrollBehavior水波纹

CustomScrollBehavior.dart

import 'package:flutter/material.dart';

class CustomScrollBehavior extends ScrollBehavior {
  @override
  Widget buildViewportChrome(
      BuildContext context, Widget child, AxisDirection axisDirection) {
    // TODO: implement buildViewportChrome
    switch (getPlatform(context)) {
      case TargetPlatform.iOS:
        return child;
      case TargetPlatform.android:
      case TargetPlatform.fuchsia:
        return GlowingOverscrollIndicator(
          showTrailing: true,
          showLeading: false,
          child: child,
          axisDirection: axisDirection,
          color: Colors.blue,
        );
    }
    return null;
    //super.buildViewportChrome(context, child, axisDirection)
  }

////  @override
//  ScrollPhysics getScrollPhysics(BuildContext context) {
//    // TODO: implement getScrollPhysics
//    return CustomNestedScrollViewFixPinnedScrollPhysics(pinnedHeight);
//    return super.getScrollPhysics(context);
//  }
//
//  @override
//  bool shouldNotify(ScrollBehavior oldDelegate) {
//    // TODO: implement shouldNotify
//    return true;
//    return pinnedHeight != (oldDelegate as CustomScrollBehavior).pinnedHeight;
//    return super.shouldNotify(oldDelegate);
//  }
}