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我有一个使用RefreshIndicator的布局。它的孩子是CustomScrollView。然而,当onRefresh处理程序被调用,它抛出一个异常刷新指示NoSuchMethod
[ERROR:../../lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter (21060): NoSuchMethodError: The method 'call' was called on null.
E/flutter (21060): Receiver: null
E/flutter (21060): Tried calling: call()
E/flutter (21060): #0 Object._noSuchMethod (dart:core-patch/object_patch.dart:43)
E/flutter (21060): #1 Object.noSuchMethod (dart:core-patch/object_patch.dart:47)
E/flutter (21060): #2 new Future.sync (dart:async/future.dart:222)
E/flutter (21060): #3 MyHomePageState.handleRefresh (file:///home/swav/Git/flutter/status-app/lib/state/state.dart:49)
E/flutter (21060): #4 RefreshIndicatorState._show.<anonymous closure> (package:flutter/src/material/refresh_indicator.dart:319)
E/flutter (21060): #5 _RootZone.runUnary (dart:async/zone.dart:1371)
E/flutter (21060): #6 _FutureListener.handleValue (dart:async/future_impl.dart:129)
E/flutter (21060): #7 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:636)
E/flutter (21060): #8 _Future._propagateToListeners (dart:async/future_impl.dart:665)
E/flutter (21060): #9 _Future._completeWithValue (dart:async/future_impl.dart:478)
E/flutter (21060): #10 _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:510)
E/flutter (21060): #11 _microtaskLoop (dart:async/schedule_microtask.dart:41)
E/flutter (21060): #12 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50)
有趣的是,onRefresh成功完成。
此外,当RefreshIndicator的直系孩子是Flex时,它并不抱怨。
你能告诉我们代码吗? –