The method 'toStringDeep' isn't defined for the class 'NumberFormat'

Question

My app was working perfectly and suddenly it started showing me compiler error. Here is the error:

Compiler message:
org-dartlang-debug:synthetic_debug_expression:1:1: Error: Method not found: 'toStringDeep'.
toStringDeep()
^^^^^^^^^^^^
org-dartlang-debug:synthetic_debug_expression:1:1: Error: The method 'toStringDeep' isn't defined for the class 'NumberFormat'.
 - 'NumberFormat' is from 'package:intl/intl.dart' ('file:///Users/chandra/flutter/.pub-cache/hosted/pub.dartlang.org/intl-0.15.7/lib/intl.dart').
Try correcting the name to the name of an existing method, or defining a method named 'toStringDeep'.
toStringDeep()

Answer 1

这是known bug 36091和30381，应在下一发行版中修复。唯一的解决方法是运行flutter clean。 （使用Android Studios工具-> Flutter-> Flutter Clean也应该起作用）。

Answer 2

每次都这样做很麻烦，因此我将其保存为默认配置，该配置适用于任何Flutter运行。

1. Run-> Edit Configurations
2. 选择Flutter，然后添加新的外部工具配置，例如
3. 下一个创建工具，如图所示
4. 确保已检查我们的外部工具
5. 最后，你应该有类似的东西
6. 好吧，做完了！

现在，每次您运行Flutter应用程序时，它将首先清理构建。