我正在尝试构建一个扩展，将NSArray/NSMutableArray的一些便利功能添加到SwiftArray类，并且我正在尝试添加此功能:funcindexOfObject(object:AnyObject)->Int?{ifself.count>0{for(idx,objectToCompare)inenumerate(self){ifobject==objectToCompare{returnidx}}}returnnil}但不幸的是，这一行:ifobject==objectToCompare{报错:couldnotfindanoverloadfor'=='thataccepts