Storyboard:this class is isn't key value coding-compliant for the key

When I write an iOS program today, I suddenly report the following error. Build the page with storyboard, with the VI Ewcontroller bound control, the hand is cheap, many times.

' Nsunknownkeyexception ', Reason: ' [Setvalue:forundefinedkey:]: This class was not key value coding-compliant for the key n Ame. '

Workaround:
1. In connection Inspector, delete the association of this outlet;
2. In the. Swift file, locate the declared property and delete it;
3. Throughout project, search for the property, and replace the previous property with the Iboutlet rewrite declaration;

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Storyboard:this class is isn't key value coding-compliant for the key