当创建函数以在Firebase中添加键值对时,我会遇到以下报告
* Terminating app due to uncaught exception 'NSUnknownKeyException',reason:‘valueForUndefinedKey::this class is not key value compliant for the key score.’* First throw call stack:(0x1dbd9a3a8 0x1daf9fd00 0x1dbcb36c8 0x1dc796054 0x1dc7ed2a0 0x1dc7070e0 0x102e