Solution: thread 1:[< *> setvalue:forundefined key]: this class is not key value coding compliant for the key*

problem ： The running program crashed , Report errors ：“Thread 1: [<*> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key **.”, The screenshot is as follows ： 

---

reason ： stay kvc In the map , Caused by inconsistent field names and number of mapped fields .

---

Solution ： make carbon copies “func setValue(_ value: Any?, forUndefinedKey key: String)” Method .

​​​​​​​