var hasMore = await widget.onRetrieveData(1, _items, pullDown); if (_items.isEmpty || _items.length % widget.pageSize != 0 && hasMore != true) { state.noMore = true; } state.items = _items;

when the _widget.pageSize == items.length, hasMore = false: the state.noMore = true does not work

通常会遇到这样的场景，列表页顶部通常有搜索框，用户输入搜索内容触发整个列表重新获取数据并刷新列表。InfiniteListView并不支持用代码控制刷新。也有朋友给过一些例子 例如在 InfiniteListView 加上 ScrollController，用代码控制ScrollController下拉位置来触发下拉刷新，但是这样做有很多问题，例如当网络延时或其他原因查不到数据时，用这个方法就触发不了第二次刷新。我自己也想了一个解决方案，目前可以正常用代码触发刷新，希望交流一下。 添加一个控制器类 class InfiniteListViewRefreshController { Future Function(bool) refreshFunc; void refresh(bool pullDown) { if(refreshFunc!=null) refreshFunc(pullDown); } }

在 InfiniteListView的构造函数中传入此类的实例。

在_InfiniteListViewState 中的initState 方法中将_InfiniteListViewState内置的刷新方法签名赋值给InfiniteListViewRefreshController 实例的refreshFunc字段，代码如下：

@override void initState() { super.initState();

state = widget.initState ?? LoadingState<T>();
if (!state.initialized) {
  refresh(false);
}

if(widget.refreshController!=null) {
  widget.refreshController.refreshFunc = refresh;
}

}

这样可以调用InfiniteListViewRefreshController 的实例方法 refresh 来触发刷新。

Error: Method not found: 'PinyinHelper.convertToPinyinStringWithoutException'. String pinyin = PinyinHelper.convertToPinyinStringWithoutException(list[i].name); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: Null check operator used on a null value E/flutter (24234): #0 ScrollPosition.viewportDimension (package:flutter/src/widgets/scroll_position.dart:175:53) E/flutter (24234): #1 _PagePosition.getPixelsFromPage (package:flutter/src/widgets/page_view.dart:382:19) E/flutter (24234): #2 PageController.animateToPage (package:flutter/src/widgets/page_view.dart:197:16) E/flutter (24234): #3 _SwiperState.animateToPage (package:flukit/src/swiper.dart:447:11) E/flutter (24234): #4 _SwiperState._start. (package:flukit/src/swiper.dart:408:7) E/flutter (24234): #5 _rootRunUnary (dart:async/zone.dart:1436:47) E/flutter (24234): #6 _CustomZone.runUnary (dart:async/zone.dart:1335:19) E/flutter (24234): #7 _CustomZone.runUnaryGuarded (dart:async/zone.dart:1244:7) E/flutter (24234): #8 _CustomZone.bindUnaryCallbackGuarded. (dart:async/zone.dart:1281:26) E/flutter (24234): #9 _rootRunUnary (dart:async/zone.dart:1444:13) E/flutter (24234): #10 _CustomZone.runUnary (dart:async/zone.dart:1335:19) E/flutter (24234): #11 _CustomZone.bindUnaryCallback. (dart:async/zone.dart:1265:26) E/flutter (24234): #12 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:395:19) E/flutter (24234): #13 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:426:5) E/flutter (24234): #14 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:184:12)

1、PullRefreshBox 的构造函数可以这样写：

PullRefreshBox({Key key, this.child, @required this.onRefresh, PullRefreshIndicator indicator, this.overScrollEffect})
      : this.indicator = indicator ?? DefaultPullRefreshIndicator(),
        super(key: key);

  final PullRefreshCallback onRefresh;
  final Widget child;
  final TargetPlatform overScrollEffect;
  final PullRefreshIndicator indicator;

2、PullRefreshBoxState 和 _AnimatedRotationBoxState 的initState没有 调用 super.initState() ，这是不合适的。 3、PullRefreshBoxState 中的方法返回Future，但是没有return。

E/flutter ( 7676): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Null check operator used on a null value E/flutter ( 7676): #0 ScrollPosition.viewportDimension (package:flutter/src/widgets/scroll_position.dart:177:53) E/flutter ( 7676): #1 _PagePosition.getPixelsFromPage (package:flutter/src/widgets/page_view.dart:390:19) E/flutter ( 7676): #2 PageController.animateToPage (package:flutter/src/widgets/page_view.dart:203:16) E/flutter ( 7676): #3 _SwiperState.animateToPage (package:flukit/src/swiper.dart:447:11) E/flutter ( 7676): #4 _SwiperState._start. (package:flukit/src/swiper.dart:408:7) E/flutter ( 7676): #5 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:398:19) E/flutter ( 7676): #6 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:429:5) E/flutter ( 7676): #7 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12) E/flutter ( 7676):

flukit-3.0.1/lib/src/safe_value_notifier.dart:20:33: Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null.

• 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/D:/flutter/packages/flutter/lib/src/scheduler/binding.dart'). package:flutter/…/scheduler/binding.dart:1 Try calling using ?. instead. SchedulerBinding.instance.addPostFrameCallback((_) {