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lianyagang / flutter_swiper_null_safety

根据大佬https://github.com/best-flutter/flutter_swiper修改到空安全swiper
MIT License
95 stars 48 forks source link

Null check operator used on a null value #4

Closed sunfa-airgram closed 3 years ago

sunfa-airgram commented 3 years ago

flutter: ══╡ EXCEPTION CAUGHT BY FOUNDATION LIBRARY ╞════════════════════════════════════════════════════════ flutter: The following _CastError was thrown while dispatching notifications for SwiperController: flutter: Null check operator used on a null value flutter: flutter: When the exception was thrown, this was the stack: flutter: #0 ScrollPosition.viewportDimension (package:flutter/src/widgets/scroll_position.dart:172:53) flutter: #1 _PagePosition.getPixelsFromPage (package:flutter/src/widgets/page_view.dart:382:19) flutter: #2 PageController.animateToPage (package:flutter/src/widgets/page_view.dart:197:16) flutter: #3 _TransformerPageViewState.onChangeNotifier (package:flutter_swiper_null_safety/src/transformer_page_view/transformer_page_view.dart:590:12) flutter: #4 ChangeNotifier.notifyListeners (package:flutter/src/foundation/change_notifier.dart:243:25) flutter: #5 IndexController.next (package:flutter_swiper_null_safety/src/transformer_page_view/index_controller.dart:30:5) flutter: #6 _SwiperTimerMixin._onTimer (package:flutter_swiper_null_safety/src/swiper.dart:369:18) flutter: (elided 10 frames from class _RawReceivePortImpl, class _Timer, and dart:async) flutter: flutter: The SwiperController sending notification was: flutter: Instance of 'SwiperController'