Objective-C:在类中设置不同协议

在下面的代码中,设置了两种不同的协议规则:一种是老师对学生设置的协议:即老师发出命令后，学生站起来、回答问题、坐下; 另一种是我对学生设置的协议:即学生按照我的协议中的初始化函数去初始化一个整数。

//我设置的协议Myprotocol，里面有我设置的协议规则(属性、函数)作为一个单独的文件

//  Myprotocol.h
//  协议
//
//  Created by ma c on 15/8/12.
//  Copyright (c) 2015年. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol Myprotocol 
@property(nonatomic,assign)NSInteger integer;
-(id)initWithInteger:(NSInteger) i;
-(void) show2;
-(void)print;
-(void) initialize;
@end

//老师设置的协议和类本身的属性 .h和.m文件；在类里面直接设置协议,没有作为单独的文件

//  Teacher.h
//  协议
//
//  Created by ma c on 15/8/12.
//  Copyright (c) 2015年. All rights reserved.
//

#import <Foundation/Foundation.h>
@protocol TeacherDelegate//老师制定协议规则
@required //在协议代理人类中必须要全部实现的方法
-(void) show1;
-(void) Standup;
-(void) Answerquestion;
@optional //协议代理人类中可以选择性的实现(可以实现，也可以不用实现)
-(void) Setdown;
@end


@interface Teacher : NSObject
@property(nonatomic,weak) id<TeacherDelegate> delegate;
-(void)ordering;
@end

//  Teacher.m
//  协议
//
//  Created by ma c on 15/8/12.
//  Copyright (c) 2015年. All rights reserved.
//

#import "Teacher.h"

@implementation Teacher
@synthesize delegate;
-(void)ordering
{
    [delegate show1];
    NSLog(@"teacher is ordering!");
    [self.delegate Standup];
    [self.delegate Answerquestion];
    [self.delegate Setdown];
}
@end

//学生类Student 它作为实现这两种协议的代理人(委托者).h和.m文件 

//  Student.h
//  协议
//
//  Created by ma c on 15/8/12.
//  Copyright (c) 2015年. All rights reserved.
//

#import "Teacher.h"
#import "TeacherDelegate.h"
#import "Myprotocol.h"
@interface Student : Teacher<TeacherDelegate,Myprotocol>
@end

//  Student.m
//  协议
//
//  Created by ma c on 15/8/12.
//  Copyright (c) 2015年. All rights reserved.
//

#import "Student.h"

@implementation Student
@synthesize integer;
//TeacherDelegate
-(void) show1
{
    NSLog(@"the teacher's protocol is running!");
}
-(void) Standup
{
    NSLog(@"student stand up.");
}
-(void) Answerquestion
{
    NSLog(@"student answer question.");
}
-(void) Setdown
{
    NSLog(@"student set down!");
}
//Myprotocol
-(void) show2
{
    NSLog(@"the my protocol is running!");
}
-(id)initWithInteger:(NSInteger) i
{
    self = [super init];
    if(self)
    {
        self.integer = i;
    }
    return self;
}
-(void)print
{
    NSLog(@"integer=%ld",self.integer);
}
-(void) initialize
{
    NSLog(@"Integer's initialization succeed.");
}
@end

//主函数测试这两种协议的实现

//  main.m
//  协议
//
//  Created by ma c on 15/8/12.
//  Copyright (c) 2015年. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Teacher.h"
#import "Student.h"
#import "Myprotocol.h"
int main(int argc, const char * argv[])
{
    @autoreleasepool
    {
        Teacher *teacher = [[Teacher alloc]init];
        
        //老师设置学生代理实现老师设置的协议(TeacherDelegate)
        Student *student = [[Student alloc]init];
        [teacher setDelegate:student];
        [teacher ordering];
        printf("
");
        
        //我设置学生代理实现我设置的协议(Myprotocol)
        Student *stu = [[Student alloc]initWithInteger:10];
        [stu show2];
        [stu print];
        [stu initialize];
    }
    return 0;
}

//运行结果

2015-08-12 19:55:51.498 协议[1965:139749] the teacher's protocol is running!
2015-08-12 19:55:51.499 协议[1965:139749] teacher is ordering!
2015-08-12 19:55:51.499 协议[1965:139749] student stand up.
2015-08-12 19:55:51.500 协议[1965:139749] student answer question.
2015-08-12 19:55:51.500 协议[1965:139749] student set down!

2015-08-12 19:55:51.500 协议[1965:139749] the my protocol is running!
2015-08-12 19:55:51.500 协议[1965:139749] integer=10
2015-08-12 19:55:51.500 协议[1965:139749] Integer's initialization succeed.
Program ended with exit code: 0