.h

{
NSString *_name;
int _age;
}
-(void)setName:(NSString *)namea;
-(NSString *)namea;
-(void)setPrice:(int)pricea;
-(int)pricea;

.m
-(void)setName:(NSString *)namea{
_name=namea;
}
-(NSString *)namea{
return _name;
}
-(void)setPrice:(int)pricea{
_age=pricea;
}
-(int)pricea{
return _age;
}

main.m

    Phone *li=[[Phone alloc]init];
    li.name=@"李莉";
    li.price=18;
    NSLog(@"%@%d",li.namea,li.pricea);
    Phone *wang=[[Phone alloc]init];
    wang.name=@"1234567";
    wang.price=18;
    NSLog(@"%@%d",wang.namea,wang
          .pricea);
    
     return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}