Hive.box('box_name').listenable() get, `The method 'toSet' was called on null`, error on flutter。

Question

当我尝试使用 这里有一个网络上的例子 Hive.box('box_name').listenable()，没有键就出现了错误。

════════ Exception caught by widgets library ═══════════════════════════════════
The following NoSuchMethodError was thrown building FutureBuilder<dynamic>(dirty, state: _FutureBuilderState<dynamic>#566bb):
The method 'toSet' was called on null.
Receiver: null
Tried calling: toSet()

The relevant error-causing widget was
    FutureBuilder<dynamic> 
package:hive_benchmark/sketcpad/sketchpad.dart:109
When the exception was thrown, this was the stack
#0      Object.noSuchMethod  (dart:core-patch/object_patch.dart:53:5)
#1      BoxX.listenable 
package:hive_flutter/src/box_extensions.dart:11
#2      _DrawingScreenState.build.<anonymous closure> 
package:hive_benchmark/sketcpad/sketchpad.dart:120
#3      _FutureBuilderState.build 
package:flutter/…/widgets/async.dart:732
#4      StatefulElement.build 
package:flutter/…/widgets/framework.dart:4619
...
════════════════════════════════════════════════════════════════════════════════

Answer 1

这个问题已经解决了，因为 hive_flutter: ^0.3.0+2 只是升级依赖性