When I use it with Swift4.0,it crashed with this message:

[ceeyang]

2017-07-04 14:17:52.193738+0800 Reflect[4302:1322488] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Reflect.Student2 0x1c02c35d0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key name.' *** First throw call stack: (0x183791858 0x181f68528 0x183791520 0x18424390c 0x10087eb08 0x10088236c 0x10088fee4 0x10087cd24 0x100877c10 0x1008834dc 0x100883570 0x189f9f6bc 0x18a047c0c 0x18a04709c 0x18a046a84 0x18a0465f0 0x18a0464f8 0x189f9ca64 0x186f756e4 0x186f7979c 0x186eec3f8 0x186f11e44 0x18a218500 0x1837383fc 0x183737bf0 0x183735918 0x183654280 0x185165f94 0x18a0030f0 0x100890524 0x182445e40) libc++abi.dylib: terminating with uncaught exception of type NSException

I

[zhangkun0625]

报错不能对NSdictionary执行setvalue for key,试试改成NSMutableDictionary