我尝试从JSON数组导入数据，如下所示：
let json = JSON(value)
let data: [[String: Any]] = self.transformJson(json)
MagicalRecord.saveInBackground({ (localContext) in
User.mr_import(from: data, in: localContext)
})
问题是mr_import swift方法调用MR_importFromObject:inContext:而不是MR_importFromArray:inContext:
以下是例外：
*由于未捕获的异常'NSUnknownKeyException'而终止应用程序，原因：'[＆lt; _SwiftValue 0x6080000c9e60＆gt; valueForUndefinedKey：]：这个 class不是密钥值编码兼容的密钥id。 * 第一次抛出调用堆栈：（0 CoreFoundation 0x0000000109ae4d4b exceptionPreprocess + 171 1 libobjc.A.dylib
0x000000010cf4a21e objc_exception_throw + 48 2 CoreFoundation
0x0000000109ae4c99 - [NSException raise] + 9 3基金会 0x000000010cb247c5 - [NSObject（NSKeyValueCoding）valueForUndefinedKey：] + 226 4 Foundation 0x000000010ca5060b - [NSObject（NSKeyValueCoding）valueForKey：] + 283 5 Foundation 0x000000010ca53eec - [NSArray（NSKeyValueCoding）valueForKey：] + 467 6 基金会0x000000010ca503e8 - [NSArray（NSKeyValueCoding）valueForKeyPath：] + 448 7 MagicalRecord 0x000000010a968ce8 - [NSObject（MagicalRecord_DataImport） MR_lookupKeyForAttribute：] + 232 8 MagicalRecord
0x000000010a968efe - [NSObject（MagicalRecord_DataImport） MR_valueForAttribute：] + 62 9 MagicalRecord
0x000000010a95b7c7 __75 + [NSManagedObject（MagicalRecord_DataImport） MR_importFromObject：inContext：] _ block_invoke + 135 10 CoreData
0x000000010d4519a7 developerSubmittedBlockToNSManagedObjectContextPerform + 199 11 CoreData 0x000000010d45185f - [NSManagedObjectContext performBlockAndWait：] + 255 12 MagicalRecord 0x000000010a95b5db + [NSManagedObject（MagicalRecord_DataImport）MR_importFromObject：inContext：] + 331 13 Kairos
0x0000000108e057ce _TFFZFV6Kairos8DataSync10fetchUsersFFOS_13StatusRequestT_T_U_FGV9Alamofire12DataResponseP__T_U_FCSo22NSManagedObjectContextT_ + 158 14 Kairos 0x0000000108dc9ecc _TTRXFo_oCSo22NSManagedObjectContext__XFdCb_dS _ + 60 15 MagicalRecord 0x000000010a953671 __73 + [MagicalRecord（ActionsDeprecated）saveInBackgroundWithBlock：completion：] _ block_invoke + 129 16 CoreData 0x000000010d4519a7 developerSubmittedBlockToNSManagedObjectContextPerform + 199 17 libdispatch.dylib 0x000000010e9740cd _dispatch_client_callout + 8 18 libdispatch.dylib 0x000000010e951e17 _dispatch_queue_serial_drain + 236 19 libdispatch.dylib 0x000000010e952b4b _dispatch_queue_invoke + 1073 20 libdispatch.dylib 0x000000010e95302b _dispatch_queue_override_invoke + 683 21 libdispatch.dylib 0x000000010e955385 _dispatch_root_queue_drain + 720 22 libdispatch.dylib 0x000000010e955059 _dispatch_worker_thread3 + 123 23 libsystem_pthread.dylib 0x000000010ed23712 _pthread_wqthread + 1299 24 libsystem_pthread.dylib 0x000000010ed231ed start_wqthread + 13）libc ++ abi.dylib：终止 带有NSException类型的未捕获异常