OC3_协议关键字

//
//  Student.h
//  OC3_协议关键字
//
//  Created by zhangxueming on 15/6/24.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Programmer.h"

@interface Student : NSObject <Programmer>

@end

//
//  Student.m
//  OC3_协议关键字
//
//  Created by zhangxueming on 15/6/24.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "Student.h"

@implementation Student

- (void)writeCode
{
    NSLog(@"writing...");
}

- (void)debugCode
{
    NSLog(@"debug...");
}

- (void)report
{
    NSLog(@"report");
}

@end

//
//  Programmer.h
//  OC3_协议关键字
//
//  Created by zhangxueming on 15/6/24.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol Programmer <NSObject>

@required//必须实现的方法(缺省)
- (void)writeCode;
- (void)debugCode;
- (void)report;

@optional//可选实现的方法
- (void)eat;
- (void)drink;

@end

//
//  main.m
//  OC3_协议关键字
//
//  Created by zhangxueming on 15/6/24.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Student.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        //NSLog(@"Hello, World!");
        Student *xiaoHua = [[Student alloc] init];
        [xiaoHua report];
        //[xiaoHua eat];

    }
    return ;
}