flutter-in-action
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flutterchina
The method 'call' was called on null.
状态管理章节，按照示例代码跑了一遍，_handleTap方法报错了。 ════════ Exception caught by gesture ═══════════════════════════════════════════════════════════════ The following NoSuchMethodError was thrown while handling a gesture: The method 'call' was called on null. Receiver: null Tried calling: call(true)
我也遇到了 版本信息如下： ➜ first_flutter_app flutter --version Flutter 1.14.6 • channel unknown • unknown source Framework • revision fabeb2a16f (5 个月前) • 2020-01-28 07:56:51 -0800 Engine • revision c4229bfbba Tools • Dart 2.8.0 (build 2.8.0-dev.5.0 fc3af737c7)
不知道你解决没？
我也遇到了 版本信息如下： ➜ first_flutter_app flutter --version Flutter 1.14.6 • channel unknown • unknown source Framework • revision fabeb2a16f (5 个月前) • 2020-01-28 07:56:51 -0800 Engine • revision c4229bfbba Tools • Dart 2.8.0 (build 2.8.0-dev.5.0 fc3af737c7)
不知道你解决没？
@andyli386 木有，刚开始看flutter这玩意，有些地方还有点整不明白。然后记录了这个问题，就继续看后面的章节了。。 等过段时间回头在去研究一下，你要是解决的话，到时候分享一些解决方法哈。。😄
Flutter 1.17.3 • channel stable • https://github.com/flutter/flutter.git Framework • revision b041144f83 (4 weeks ago) • 2020-06-04 09:26:11 -0700 Engine • revision ee76268252 Tools • Dart 2.8.4