oc 封装／继承／多态－一看就明白

标签：ios   多态   继承   封装   

镔哥哥就不多说，简单介绍单面：

//

//  Person.h

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

/*

 封装：隐藏内部实现，稳定外部接口.

 封装就是定义类定义属性 定义方法

 */

#import <Foundation/Foundation.h>

@interface Person : NSObject

//属性封装了setter get方法

@property(nonatomic,strong)NSString *name,*sex;

@property(nonatomic,assign)int age;

-(id)initWithName:(NSString *)name sex:(NSString *)sex age:(int)age;

-(Person *)work;

@end

  Person.m

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

#import "Person.h"

@implementation Person

-(id)initWithName:(NSString *)name sex:(NSString *)sex age:(int)age

{

    self = [superinit];

    if (self) {

        self.name = name;

        self.sex = sex;

        self.age = age;

    }

    return self;

}

-(Person *)work

{

    NSLog(@"%@正在埋头工作",self.name);

    return 0;

}

@end

//  Worker.h

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

/*

 继承：子类可以直接复用父类中的成员.子类继承父类所有方法的声明和实现非私有的实例变量以及协议 继承是要在.h中声明一下继承具有单根性和传递性

 继承就是代码优化公共部分交给父类

 */

#import "Person.h"

@interface Worker : Person

@end

/

//  Worker.m

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

#import "Worker.h"

@implementation Worker

@end

//

//  King.h

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

#import "Person.h"

@interface King : Person

@end

//

//  King.m

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

#import "King.h"

@implementation King

@end

//

//  ViewController.h

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

/*

 多态：不同对象对同一消息的不同响应.子类可以重写父类的方法

 多态就是允许方法重名参数或返回值可以是父类型传入或返回

 */

#import <UIKit/UIKit.h>

#import "Worker.h"

#import "King.h"

@interface ViewController : UIViewController

@end

//

//  ViewController.m

//  封装继承多态

//

//  Created by apple on 14/12/29.

//  Copyright (c) 2014年 huweibin. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    Worker *worker = [[Workeralloc]init];

    worker.name = @"镔哥哥";

    [worker work];//worker可以换为父类型Person

    King *king = [[Kingalloc]init];

    king.name = @"汉高祖";

    [king work];//king可以换为父类型Person

    // Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning {

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

oc 封装／继承／多态－一看就明白

标签：ios   多态   继承   封装   

原文地址：http://blog.csdn.net/sammyieveo/article/details/42235121