请问iOS里 "->" 是什么意思?

请问iOS里 "->" 是什么意思? - (id)copyWithZone:(NSZone *)zone {          MyObj *copy = [[[self class] allocWithZone:zone] init];          copy->name = [name copy];          copy->imutableStr = [imutableStr copy]; //       copy->name = [name copyWithZone:zone];; //       copy->imutableStr = [name copyWithZone:zone];//          copy->age = age;          return copy; }

c语言中结构体属性。。。相当于copy.name之类的吧...