23种设计模式（十）

作者: 刀客传奇 | 来源:发表于2017-04-29 11:42 被阅读59次

版本记录

版本号	时间
V1.0	2017.04.29

前言

前面讲了23种设计模式中的前几个，下面我们继续，先看前几篇文章。
1. 23种设计模式（一)
2. 23种设计模式（二）
3. 23种设计模式（三)
4. 23种设计模式（四)
5. 23种设计模式（五)
6. 23种设计模式（六)
7. 23种设计模式（七)
8. 23种设计模式（八)
9. 23种设计模式（九)

详述

十九、职责链模式——Chain of Responsibility

使多个对象都有机会处理请求，从而避免请求的发送者和接受者之间的耦合关系，将这个对象连成一条链传递该请求，直到有一个对象处理它为止。先看一下原理图。

职责链模式原理图

看代码组织结构。

代码组织结构

看代码。

1. ViewController.m

#import "ViewController.h"
#import "HCDMnager.h"
#import "HCDCommonManager.h"
#import "HCDMajorManager.h"
#import "HCDGenaralManager.h"
#import "HCDReuquest.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    HCDCommonManager *common = [[HCDCommonManager alloc]initWithName:@"猪经理"];
    HCDMajorManager *majon = [[HCDMajorManager alloc]initWithName:@"狗总监"];
    HCDGenaralManager *genaral = [[HCDGenaralManager alloc]initWithName:@"蛤蟆总经理"];
    common.superior = majon;
    majon.superior = genaral;
    
    HCDReuquest *request = [[HCDReuquest alloc]init];
    request.requestType = @"请假";
    request.number = 5;
    [common dealRequest:request];
    
    request.number = 20;
    [common dealRequest:request];
    
    request.number = 220;
    [common dealRequest:request];
    
    request.number = 1200;
    [common dealRequest:request];
}

@end

2. HCDMnager.h

#import <Foundation/Foundation.h>

@class HCDMnager,HCDReuquest;

@interface HCDMnager : NSObject

@property (nonatomic, copy) NSString *name;

@property (nonatomic, strong) HCDMnager *superior;

- (instancetype)initWithName:(NSString *)name;

- (void)dealRequest:(HCDReuquest *)request;

@end

3. HCDMnager.m

#import "HCDMnager.h"
#import "HCDReuquest.h"

@implementation HCDMnager

- (instancetype)initWithName:(NSString *)name
{
    self = [super init];
    if (self) {
        _name = name;
    }
    return self;
}

- (void)dealRequest:(HCDReuquest *)request
{
    
}

@end

4. HCDReuquest.h

#import <Foundation/Foundation.h>

@interface HCDReuquest : NSObject

@property (nonatomic, copy) NSString *requestType;
@property (nonatomic, assign) NSInteger number;

@end


5. HCDReuquest.m

#import "HCDReuquest.h"

@implementation HCDReuquest

@end

6. HCDCommonManager.h

#import "HCDMnager.h"

@interface HCDCommonManager : HCDMnager

@end

7. HCDCommonManager.m

#import "HCDCommonManager.h"
#import "HCDReuquest.h"

@implementation HCDCommonManager

- (void)dealRequest:(HCDReuquest *)request
{
    if ([request.requestType isEqualToString:@"请假"] && request.number < 10) {
        NSLog(@"%@处理了%@,时间是%ld",self.name,request.requestType,request.number);
    }
    else{
        [self.superior dealRequest:request];
    }
}

@end

8. HCDMajorManager.h

#import "HCDMnager.h"

@interface HCDMajorManager : HCDMnager

@end


9. HCDMajorManager.m

#import "HCDMajorManager.h"
#import "HCDReuquest.h"

@implementation HCDMajorManager

- (void)dealRequest:(HCDReuquest *)request
{
    if ([request.requestType isEqualToString:@"请假"] && request.number < 50) {
        NSLog(@"%@处理了%@,时间是%ld",self.name,request.requestType,request.number);
    }
    else{
        [self.superior dealRequest:request];
    }
}

@end

10. HCDGenaralManager.h

#import "HCDMnager.h"

@interface HCDGenaralManager : HCDMnager

@end


11. HCDGenaralManager.m

#import "HCDGenaralManager.h"
#import "HCDReuquest.h"

@implementation HCDGenaralManager

- (void)dealRequest:(HCDReuquest *)request
{
    if ([request.requestType isEqualToString:@"请假"] && request.number < 500) {
        NSLog(@"%@处理了%@,时间是%ld",self.name,request.requestType,request.number);
    }
    else{
        NSLog(@"%@不同意%@,时间是%ld",self.name,request.requestType,request.number);
    }
}

@end

看结果。

2017-04-29 10:58:55.169 19职责链模式[1184:25440] 猪经理处理了请假,时间是5
2017-04-29 10:58:55.170 19职责链模式[1184:25440] 狗总监处理了请假,时间是20
2017-04-29 10:58:55.170 19职责链模式[1184:25440] 蛤蟆总经理处理了请假,时间是220
2017-04-29 10:58:55.170 19职责链模式[1184:25440] 蛤蟆总经理不同意请假,时间是1200

结论：思想。

二十、中介者模式——Mediator

用一个中介对象来封装一系列的对象交互，中介者使各个对象不需要显式地相互引用，从而使其耦合松散，而且可以独立地改变它们之间的交互。先看一下原理示例图。

中介者模式示例图

下面看一下代码结构图。

中介者模式代码组织结构

下面看代码。

1. ViewController.m

#import "ViewController.h"
#import "HCDColleagueA.h"
#import "HCDColleagueB.h"
#import "HCDAbstractMediator.h"
#import "HCDMediator.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    HCDAbstractColleague *colleagueA = [[HCDColleagueA alloc]init];
    HCDAbstractColleague *colleagueB = [[HCDColleagueB alloc]init];
    
    HCDAbstractMediator *mediator = [[HCDMediator alloc]initWithColleagueA:colleagueA colleagueB:colleagueB];
    colleagueA.mediator = mediator;
    colleagueB.mediator = mediator;
    
    colleagueA.number = 1450;
    colleagueB.number = 1450;
    [colleagueA notice];
    NSLog(@"%f---%f",colleagueA.number,colleagueB.number);
    colleagueB.number = 123;
    [colleagueB notice];
    NSLog(@"%f---%f",colleagueA.number,colleagueB.number);
}

@end


2. HCDAbstractColleague.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@class HCDAbstractMediator;

@interface HCDAbstractColleague : NSObject

@property (nonatomic, assign) CGFloat number;

- (void)notice;

@property(nonatomic,strong) HCDAbstractMediator *mediator;

@end

3. HCDAbstractColleague.m

#import "HCDAbstractColleague.h"
#import "HCDAbstractMediator.h"

@implementation HCDAbstractColleague

@end

4. HCDMediator.h

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

@interface HCDMediator : HCDAbstractMediator

@end

5. HCDMediator.m

#import "HCDMediator.h"

@implementation HCDMediator

@synthesize colleagueB = _colleagueB;
@synthesize colleagueA = _colleagueA;

- (instancetype)initWithColleagueA:(HCDAbstractColleague *)colleagueA colleagueB:(HCDAbstractColleague *)colleagueB
{
    self = [super init];
    if (self) {
        _colleagueA = colleagueA;
        _colleagueB = colleagueB;
    }
    return self;
}

- (void)setValueToColleagueA:(CGFloat)value
{
    self.colleagueA.number = value * 100;
}

- (void)setValueToColleagueB:(CGFloat)value
{
    self.colleagueB.number = value * 0.01;
}

@end

6. HCDColleagueA.h

#import "HCDAbstractColleague.h"

@interface HCDColleagueA : HCDAbstractColleague

@end

7. HCDColleagueA.m

#import "HCDColleagueA.h"
#import "HCDAbstractMediator.h"

@implementation HCDColleagueA

- (void)notice
{
    [self.mediator setValueToColleagueB:self.number];
}

@end

8. HCDColleagueB.h

#import "HCDAbstractColleague.h"

@interface HCDColleagueB : HCDAbstractColleague

@end

9. HCDColleagueB.m

#import "HCDColleagueB.h"
#import "HCDAbstractMediator.h"

@implementation HCDColleagueB

- (void)notice
{
    [self.mediator setValueToColleagueA:self.number];
}

@end

10. HCDAbstractMediator.h

#import <Foundation/Foundation.h>
#import "HCDColleagueB.h"
#import "HCDColleagueA.h"

@interface HCDAbstractMediator : NSObject

- (instancetype)initWithColleagueA:(HCDAbstractColleague *)colleagueA colleagueB:(HCDAbstractColleague *)colleagueB;

@property (nonatomic, weak) HCDAbstractColleague *colleagueA;
@property (nonatomic, weak) HCDAbstractColleague *colleagueB;

- (void)setValueToColleagueA:(CGFloat)value;
- (void)setValueToColleagueB:(CGFloat)value;

@end


11. HCDAbstractMediator.m

#import "HCDAbstractMediator.h"

@implementation HCDAbstractMediator

@end

看结果。

2017-04-29 11:23:14.332 20中介者模式[1615:39216] 1450.000000---14.500000
2017-04-29 11:23:14.333 20中介者模式[1615:39216] 12300.000000---123.000000

结论：思想。

后记

今天是五一放假的第一天，起来的有点晚，大约十点多才起床，起来了以后才想起来有一篇还没写，就接着写了，下午再写一篇，给23种设计模式一个了结，再次谢谢大家。

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23种设计模式（十）

版本记录

前言

详述

十九、职责链模式——Chain of Responsibility

二十、中介者模式——Mediator

后记

相关文章

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