如何在RLMObject中声明一个整数数组？
喜欢 ：
dynamic var key:[Int]?
给出以下错误：
Terminating app due to uncaught exception 'RLMException',reason: ''NSArray' is not supported as an RLMObject property. All properties must be primitives,NSString,NSDate,NSData,RLMArray,or subclasses of RLMObject. See https://realm.io/docs/objc/latest/api/Classes/RLMObject.html for more information.'
