20150624_OC之代理及反向代理的简单例子

原创 于 2015-07-03 21:42:50 发布 · 543 阅读 · 0 ·
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文章标签：

#代理 #delegate #反向代理

以下例子从例1到例6由浅到深说明代理:

例子1:

//
//  Dog.h
//  IOS150624_ObjectiveC_代理5
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Dog : NSObject
- (void)bark;
@end

//
//  Dog.m
//  IOS150624_ObjectiveC_代理5
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Dog.h"

@implementation Dog
- (void)bark
{
    NSLog(@"汪汪汪汪");
}
@end

//
//  Person.h
//  IOS150624_ObjectiveC_代理5
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Dog.h"
@interface Person : NSObject
{
    Dog *_delegate;
}
@property (nonatomic)Dog *delegate;
- (void)go;
@end

//
//  Person.m
//  IOS150624_ObjectiveC_代理5
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Person.h"

@implementation Person
- (void)go
{
    [_delegate bark];
}
@end

//
//  main.m
//  IOS150624_ObjectiveC_代理5
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
//代理:
//买火车票  本人-->黄牛
//小张找律师帮她打官司
//以小张的角度:律师是小张的代理(正向代理)
//一律师的角度:小张是律师的代理(反向代理)


int main(int argc, const char * argv[]) {
    @autoreleasepool {
        //狗市xiaozhang的代理
        Person *xiaoZhang = [[Person alloc] init];
        Dog *dog = [[Dog alloc] init];
        xiaoZhang.delegate = dog;
        [xiaoZhang go];
        
    }
    return 0;
}

例子2:

//
//  Cat.h
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Cat : NSObject
- (void)bark;
@end

//
//  Cat.m
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Cat.h"

@implementation Cat
- (void)bark
{
    NSLog(@"喵喵叫");
}
@end

//
//  Dog.h
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Dog : NSObject
- (void)bark;
@end

//
//  Dog.m
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Dog.h"

@implementation Dog
- (void)bark
{
    NSLog(@"汪汪叫");
}
@end

//
//  Person.h
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Person : NSObject
{
    id _delegate;
}
@property (retain,nonatomic)id delegate;
- (void)go;
@end

//
//  Person.m
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Person.h"
#import "Dog.h"
#import "Cat.h"
@implementation Person

- (void)go
{
    [_delegate bark];//调用代理对象中的方法
}
@end

//  main.m
//  IOS150624_ObjectiveC_代理6
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
#import "Dog.h"
#import "Cat.h"
//这里的代理还不是真正意义上的代理
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Person *xiaoZhang = [[Person alloc] init];
        Dog *dog = [[Dog alloc] init];
        Cat *cat = [[Cat alloc] init];
        xiaoZhang.delegate = dog;
        [xiaoZhang go];
        xiaoZhang.delegate = cat;
        [xiaoZhang go];
    }
    return 0;
}

例子3:

//
//  ProtectedDelegate.h
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol ProtectedDelegate <NSObject>
- (void)bark;
@end
//———————————
//
//  Dog.h
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
@interface Dog : NSObject <ProtectedDelegate>
@end
//—————————————
//
//  Dog.m
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Dog.h"

@implementation Dog
- (void)bark
{
    NSLog(@"汪汪汪叫");
}
@end
//—————————————
//
//  Cat.h
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
@interface Cat : NSObject <ProtectedDelegate>

@end
//———————————————
//
//  Cat.m
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Cat.h"

@implementation Cat
- (void)bark
{
    NSLog(@"喵喵喵叫");
}
@end
//—————————————————
//
//  Person.h
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
@interface Person : NSObject
{
    id <ProtectedDelegate>_delegate;   //对象指针也遵守协议
}
@property (retain,nonatomic)id <ProtectedDelegate>delegate;
- (void)go;
@end
//————————————————
//
//  Person.m
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Person.h"
@implementation Person
- (void)go
{
    [_delegate bark];
}
@end
//————————————————
//
//  main.m
//  IOS150624_ObjectiveC_代理7
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
#import "Dog.h"
#import "Cat.h"

//封装协议的代理
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Person *xiaoZhang = [[Person alloc] init];
        Dog *dog = [[Dog alloc] init];
        Cat *cat = [[Cat alloc] init];
        xiaoZhang.delegate = dog;
        [xiaoZhang go];
        xiaoZhang.delegate = cat;
        [xiaoZhang go];
    }
    return 0;
}


例子4:
代理正向传值:人向狗传递交的次数
//
//  ProtectedDelegate.h
//  IOS150624_ObjectiveC_代理正向传值8
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol ProtectedDelegate <NSObject>
- (void)bark:(NSInteger)count;
@end
//——————————————
//
//  Dog.h
//  IOS150624_ObjectiveC_代理正向传值8
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
@interface Dog : NSObject <ProtectedDelegate>

@end
//——————————————
//
//  Dog.m
//  IOS150624_ObjectiveC_代理正向传值8
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Dog.h"

@implementation Dog
- (void)bark:(NSInteger)count
{
    while (count) {
        NSLog(@"汪");
        count--;
    }
}
@end
//———————————————
//
//  Person.h
//  IOS150624_ObjectiveC_代理正向传值8
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
@interface Person : NSObject
{
    id <ProtectedDelegate>_delegate;
}
@property (retain,nonatomic)id <ProtectedDelegate>delegate;
@property (assign,nonatomic)NSInteger count;
- (void)go;
@end
//———————————————————
//
//  Person.m
//  IOS150624_ObjectiveC_代理正向传值8
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Person.h"

@implementation Person
- (void)go
{
    [_delegate bark:[self count]];
}
@end
//———————————————————
//
//  main.m
//  IOS150624_ObjectiveC_代理正向传值8
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
#import "Dog.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Person *xiaoZhang = [[Person alloc] init];
        Dog *dog = [[Dog alloc] init];
        xiaoZhang.count = 5;
        xiaoZhang.delegate = dog;
        [xiaoZhang go];
    }
    return 0;
}


例子5:
反向传值:狗返回要的人数
//
//  ProtectedDelegate.h
//  IOS150624_ObjectiveC_代理反向传值9
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol ProtectedDelegate <NSObject>
- (void)bark;
@end
//———————————
//
//  Dog.h
//  IOS150624_ObjectiveC_代理反向传值9
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
#import "Person.h"
@interface Dog : NSObject <ProtectedDelegate>
@property (nonatomic)Person *master;    //指向主人的对象指针
@end
//————————————
//
//  Dog.m
//  IOS150624_ObjectiveC_代理反向传值9
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Dog.h"

@implementation Dog
- (void)bark
{
    NSLog(@"要人啦");
    [self.master report:arc4random()%10+1];
    //实现反向传值,将值反传给Person;对象指针指向谁就向谁汇报
}
@end
//———————————————
//
//  Person.h
//  IOS150624_ObjectiveC_代理反向传值9
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ProtectedDelegate.h"
@interface Person : NSObject
@property (assign,nonatomic)id <ProtectedDelegate>delegate;
- (void)go;
- (void)report:(NSInteger)count;
@end
//———————————————
//
//  Person.m
//  IOS150624_ObjectiveC_代理反向传值9
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Person.h"

@implementation Person
- (void)go
{
    [self.delegate bark];
}

- (void)report:(NSInteger)count
{
    NSLog(@"Kill %ld people",count);
}
@end
//———————————————
//
//  main.m
//  IOS150624_ObjectiveC_代理反向传值9
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
#import "Dog.h"

//将狗咬的人数汇报给它的主人
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Person *xiaoZhang = [[Person alloc] init];
        Dog *dog = [[Dog alloc] init];
        xiaoZhang.delegate = dog;   //狗成了人的咬人的代理
        dog.master = xiaoZhang;     //人是狗的主人,对象指针指向其主人
        [xiaoZhang go];
    }
    return 0;
}



例子6:
真正的代理
//
//  ReceiveReportDelegate.h
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol ReceiveReportDelegate <NSObject>
- (void)report:(NSInteger)count;
@end
//———————————
//
//  Person.h
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ReceiveReportDelegate.h"
@interface Person : NSObject <ReceiveReportDelegate>

@end
//———————————
//
//  Person.m
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Person.h"

@implementation Person
- (void)report:(NSInteger)count
{
    NSLog(@"Hi,EarthPeople,I killed %ld person",count);
}
@end
//————————————————
//
//  Mars.h
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ReceiveReportDelegate.h"
@interface Mars : NSObject <ReceiveReportDelegate>

@end
//————————————
//
//  Mars.m
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Mars.h"

@implementation Mars
- (void)report:(NSInteger)count
{
    NSLog(@"Hi,Mars people,I killed %ld person",count);
}
@end
//———————————————
//
//  Dog.h
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "ReceiveReportDelegate.h"
@interface Dog : NSObject
@property (assign,nonatomic)id <ReceiveReportDelegate>delegate;
- (void)bark;
@end
//—————————————————
//
//  Dog.m
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import "Dog.h"

@implementation Dog
- (void)bark
{
    NSLog(@"汪");
    [self.delegate report:arc4random()%10];
}
@end
//————————————————
//
//  main.m
//  IOS150624_ObjectiveC_真正的代理10
//
//  Created by PengJunlong on 15/6/24.
//  Copyright (c) 2015年 Peng Junlong. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Dog.h"
#import "Person.h"
#import "Mars.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        Dog *dog = [[Dog alloc] init];
        Person *xiaoZhang = [[Person alloc] init];
        dog.delegate = xiaoZhang;
        [dog bark];
        //结果:
        //汪
        //Hi,EarthPeople,I killed 5 person
        
        Person *xiaoMing = [[Person alloc] init];
        dog.delegate = xiaoMing;
        [dog bark];
        //结果:
        //汪
        //Hi,EarthPeople,I killed 1 person
    }
    return 0;
}


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