I'm getting this exception on Carousel after updating flutter to the latest version. Carousel was working fine on flutter version 1.22.4. But upon switching to latest version (2.0.3), I'm getting this exception. Below are the code and exception. I'm using the below package
https://pub.dev/packages/carousel_pro
Exception
════════ Exception caught by rendering library ═════════════════════════════════ The following NoSuchMethodError was thrown during performLayout(): The getter 'key' was called on null. Receiver: null Tried calling: key
The relevant error-causing widget was Carousel lib\…\homeViews\homeAppBarDelegate.dart:39 When the exception was thrown, this was the stack #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:54:5) #1 SliverChildListDelegate.build package:flutter/…/widgets/sliver.dart:722 #2 SliverMultiBoxAdaptorElement._build package:flutter/…/widgets/sliver.dart:1201 #3 SliverMultiBoxAdaptorElement.createChild. package:flutter/…/widgets/sliver.dart:1214 #4 BuildOwner.buildScope package:flutter/…/widgets/framework.dart:2647 ... The following RenderObject was being processed when the exception was fired: RenderSliverFillViewport#4a87d relayoutBoundary=up2 NEEDS-LAYOUT NEEDS-PAINT RenderObject: RenderSliverFillViewport#4a87d relayoutBoundary=up2 NEEDS-LAYOUT NEEDS-PAINT parentData: paintOffset=Offset(0.0, 0.0) (can use size) constraints: SliverConstraints(AxisDirection.right, GrowthDirection.forward, ScrollDirection.idle, scrollOffset: 0.0, remainingPaintExtent: 411.4, crossAxisExtent: 230.0, crossAxisDirection: AxisDirection.down, viewportMainAxisExtent: 411.4, remainingCacheExtent: 411.4, cacheOrigin: 0.0) geometry: null no children current live ════════════════════════════════════════════════════════════════════════════════
Code
class HomeView extends StatefulWidget {
@override
_HomeViewState createState() => _HomeViewState();
}
class _HomeViewState extends State<HomeView> {
@override
Widget build(BuildContext context) {
return Scaffold(
...................
Stack(
children: [
CustomScrollView(
controller: _scrollController,
slivers: <Widget>[
SliverPersistentHeader(
delegate: HomeAppBarDelegate(
maxExtent: 230,
minExtent: 50,
),
pinned: true,
floating: false,
),
],
),
],
),
),
},
}
import 'package:carousel_pro/carousel_pro.dart';
class HomeAppBarDelegate extends SliverPersistentHeaderDelegate {
@override
Widget build(
BuildContext context, double shrinkOffset, bool overlapsContent) {
return Stack(
children: [
...................
// ------------------------------ C O V E R B L U R I M A G E S
Carousel(
animationCurve: Curves.easeInOutQuint,
animationDuration: Duration(seconds: 1),
dotBgColor: Colors.transparent,
overlayShadow: true,
autoplayDuration: Duration(seconds: 4),
showIndicator: false,
dotIncreasedColor: Colors.brown,
onImageChange: (prevInd, currInd) => coverImgIndex = currInd,
images: [
...coverImagesList.map(
(singleImg) => HomeBlurCoverImg(
imgURl: singleImg,
animationVal: animationVal,
maxExtent: maxExtent,
sizingInformation: sizingInformation,
),
),
],
),
],
),
Getting blank screen
