Closed
Description
Version
1.25.1
Platforms
iOS
Device Model
15 promax
flutter info
[✓] Flutter (Channel stable, 3.29.0, on macOS 15.1.1 24B91 darwin-arm64, locale zh-Hans-CN) [532ms]
• Flutter version 3.29.0 on channel stable at /Users/development/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 35c388afb5 (3 weeks ago), 2025-02-10 12:48:41 -0800
• Engine revision f73bfc4522
• Dart version 3.7.0
• DevTools version 2.42.2
[!] Android toolchain - develop for Android devices (Android SDK version 35.0.0) [533ms]
• Android SDK at /Users/leo/Library/Android/sdk
✗ cmdline-tools component is missing
Run `path/to/sdkmanager --install "cmdline-tools;latest"`
See https://developer.android.com/studio/command-line for more details.
✗ Android license status unknown.
Run `flutter doctor --android-licenses` to accept the SDK licenses.
See https://flutter.dev/to/macos-android-setup for more details.
[!] Xcode - develop for iOS and macOS (Xcode 16.2) [1,485ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16C5032a
! CocoaPods 1.16.0 out of date (1.16.2 is recommended).
CocoaPods is a package manager for iOS or macOS platform code.
Without CocoaPods, plugins will not work on iOS or macOS.
For more info, see https://flutter.dev/to/platform-plugins
To update CocoaPods, see https://guides.cocoapods.org/using/getting-started.html#updating-cocoapods
[✓] Chrome - develop for the web [129ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[!] Android Studio (not installed) [129ms]
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.dev/to/macos-android-setup for detailed instructions).
[✓] IntelliJ IDEA Ultimate Edition (version 2024.1.5) [129ms]
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin version 83.0.2
• Dart plugin version 241.18968.26
[✓] Connected device (4 available) [5.9s]
• 刘刚的iPhone (mobile) • 00008130-001E48923CD8001C • ios • iOS 18.3.1 22D72
• macOS (desktop) • macos • darwin-arm64 • macOS 15.1.1 24B91 darwin-arm64
• Mac Designed for iPad (desktop) • mac-designed-for-ipad • darwin • macOS 15.1.1 24B91 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 133.0.6943.142
[✓] Network resources [4.0s]
• All expected network resources are available.
! Doctor found issues in 3 categories.How to reproduce?
问题：AnchorList 有时候锚点对不准，有时候准，请看视频, 请尽快修复这个问题
https://github.com/user-attachments/assets/bc2defa7-e2f0-44b4-ab56-c1ba2965e5c4
Logs
Example code (optional)
/*
* @Author: LinXunFeng [email protected]
* @Repo: https://github.com/LinXunFeng/flutter_scrollview_observer
* @Date: 2022-08-08 00:20:03
*/
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:scrollview_observer/scrollview_observer.dart';
class AnchorListPage extends StatefulWidget {
const AnchorListPage({Key? key}) : super(key: key);
@override
State<AnchorListPage> createState() => _AnchorListPageState();
}
class _AnchorListPageState extends State<AnchorListPage>
with SingleTickerProviderStateMixin {
ScrollController scrollController = ScrollController();
late ListObserverController observerController;
late TabController _tabController;
List<String> tabs = List.generate(100, (index) => index.toString());
List<int> tabIndexs = List.generate(100, (index) => index);
@override
void initState() {
super.initState();
observerController = ListObserverController(controller: scrollController);
_tabController = TabController(length: tabs.length, vsync: this);
}
@override
void dispose() {
observerController.controller?.dispose();
_tabController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Anchor ListView"),
bottom: PreferredSize(
preferredSize: const Size(double.infinity, 44),
child: TabBar(
controller: _tabController,
isScrollable: true,
tabs: tabs.map((e) => Tab(text: e)).toList(),
onTap: (index) {
print(index);
print(tabIndexs[index]);
observerController.animateTo(
index: tabIndexs[index],
duration: const Duration(milliseconds: 500),
curve: Curves.ease,
);
},
),
),
),
body: ListViewObserver(
controller: observerController,
child: _buildListView(),
onObserve: (resultModel) {
_tabController.index = ObserverUtils.calcAnchorTabIndex(
observeModel: resultModel,
tabIndexs: tabIndexs,
currentTabIndex: _tabController.index,
);
print( _tabController.index);
},
),
);
}
ListView _buildListView() {
return ListView.separated(
controller: scrollController,
itemBuilder: (ctx, index) {
return _buildListItemView(index);
},
separatorBuilder: (ctx, index) {
return _buildSeparatorView();
},
itemCount: 100,
);
}
Widget _buildListItemView(int index) {
return Container(
height: 50.0 + Random().nextInt(50),
color: Colors.primaries[index % Colors.primaries.length],
child: Center(
child: Text(
"index -- $index",
style: const TextStyle(
color: Colors.black,
),
),
),
);
}
Container _buildSeparatorView() {
return Container(
color: Colors.white,
height: 0,
);
}
}Contact
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