OC中协议、代理

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Boss类的声明文件

#import <Foundation/Foundation.h>

@protocol BossDelegate

-(void)bookTicket;//预定机票

-(void)bookRoom;//预定房间

-(void)notify;//开会

@end 

@interface Boss : NSObject

@property(nonatomic,weak)id<BossDelegate>delegate;

-(void)travel;//旅行

-(void)metting;//开会

@end

Boss类的实现文件：

#import "Boss.h"

@implementation Boss

-(void)travel

{

    //1.订机票

    [_delegate bookTicket];

    //2.订房间

    [_delegate bookRoom];

    //3.去旅行

    NSLog(@"boss travel.");

}

-(void)metting

{

    //1.通知开会

    [_delegate notify];

    //2.老板讲话

    NSLog(@"boss speak:hello!everybody.");

}

@end

员工的声明文件:

#import <Foundation/Foundation.h>

#import "Boss.h"

@interface Person : NSObject<BossDelegate>

@end

员工的实现文件：

#import "Person.h"

 @implementation Person

-(void)bookTicket{

    NSLog(@"person bookTicket.");

}

-(void)bookRoom

{

    NSLog(@"person bookRoom.");

}

-(void)notify

{

    NSLog(@"person metting.");

}

@end

 //测试文件

#import <Foundation/Foundation.h>

#import "Boss.h"

#import "Person.h"

#import "Student.h"

int main(int argc, const char * argv[]) {

    @autoreleasepool {

        Boss *boss = [Boss new];

        Person *person = [Person new];

        [boss setDelegate:person];

        [boss travel];

        [boss metting];

　　　//现在老板计划招一名学生当助理，有助理来完成以上工作

      　Student *stu = [Student new];

        [boss setDelegate:stu];

        [boss travel];

        [boss metting];

    }

    return 0;

}

OC中协议、代理

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原文地址：http://www.cnblogs.com/xjf125/p/4724587.html