类不符合键值编码
[英]Class is not key value coding compliant
问题描述
I have a NavigationController , root view controller called "ViewController" and a second view controller called "SettingsViewController". 
我有一个NavigationController ，根视图控制器称为“ ViewController”，第二个视图控制器称为“ SettingsViewController”。 I have a segue to the "SettingsViewController" from "ViewController" which worked until I tried to connect a UITextField called "usernameField" to the "SettingsViewController" by means of Reference Outlet. 我对“ ViewController”中的“ SettingsViewController”有一个看法，直到我尝试通过参考插座将名为“ usernameField”的UITextField连接到“ SettingsViewController”为止。 When I did I got the following error whenever I try to go to the SettingsViewController: 当我尝试转到SettingsViewController时，遇到以下错误：
*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<_TtC6mayfly22SettingsViewController 0x15e72af0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key usernameField.'
When I googled the error, most people said that it was caused by a reference outlet that got deleted in code but not in storyboard, or something along those lines, however I have thoroughly checked and have tried remaking the text box numerous times. 当我搜索该错误时，大多数人都说这是由参考插座引起的，该参考插座在代码中被删除，但在情节提要中并未删除，或者是类似的内容，但是我已经进行了彻底检查，并尝试过多次重新构造文本框。 What could I be doing wrong that could be causing this error? 我可能做错了什么可能导致此错误？
1 个解决方案
解决方案1
0 2014-07-12 00:44:32
Solve this problem by cleaning app and rebuilding it. 通过清洁应用程序并重建它来解决此问题。 Product > Clean or Shift + Command + K 产品>清除或Shift + Command + K
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