day06-04-多态

Objective-c

//  main.m
//  day06-04-多态
//
//  Created by Aaron on 15/7/8.
//  Copyright (c) 2015年 Aaron. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Dog.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Dog *d = [[Dog alloc] init];
        [d show];
    }
    return 0;
}

#import <Foundation/Foundation.h>
@interface Animal : NSObject
{
    @private
    NSString *_name;
}
-(void)showName;
@end

#import "Animal.h"
@implementation Animal
-(instancetype)init
{
    if(self =[super init])
    {
        _name = @"xxx";
    }
    return self;
}
//-(void)setName:(NSString *)name
//{
//    _name = name;
//}
-(NSString *)name
{
    return _name;
}
-(void)showName
{
    NSLog(@"%@",[self name]);
}
@end

#import "Animal.h"
@interface Dog : Animal
-(void)show;
@end

#import "Dog.h"
@implementation Dog
-(void)show
{
    NSLog(@"jsahdak");
    [super showName];
}
@end