1、对象作为方法的参数  
假设有Person类: Person类有name、sex属性  
假设实例化Person的对象  

Person *p = [Person new];
p->name ="凤姐";
p->sex = "女";
...... ......
-(void) displayPerson:(Person *)person{
    NSLog("姓名:%@",person->name); NSLog("姓名:%@",person->sex);
} ...... ......

2、对象做方法的返回值  
-(Person *)changePerson:(Person *)person{
    person->name = @"唐僧";
    person->sex =@"男";
    person->age = person->age+1;
    return person;
}
Person *p2 = [d changePerson:p1];
[d displayPerson:p2];

还有技术分怎么得