版本記錄

前言

前面講了23種設(shè)計(jì)模式中的前幾個(gè)，下面我們繼續(xù)笑诅，先看前幾篇文章平委。
1. 23種設(shè)計(jì)模式（一)
2. 23種設(shè)計(jì)模式（二）
3. 23種設(shè)計(jì)模式（三)
4. 23種設(shè)計(jì)模式（四)
5. 23種設(shè)計(jì)模式（五)
6. 23種設(shè)計(jì)模式（六)
7. 23種設(shè)計(jì)模式（七)
8. 23種設(shè)計(jì)模式（八)
9. 23種設(shè)計(jì)模式（九)

詳述

十九间唉、職責(zé)鏈模式——Chain of Responsibility

使多個(gè)對(duì)象都有機(jī)會(huì)處理請(qǐng)求，從而避免請(qǐng)求的發(fā)送者和接受者之間的耦合關(guān)系唱蒸，將這個(gè)對(duì)象連成一條鏈傳遞該請(qǐng)求，直到有一個(gè)對(duì)象處理它為止烛愧。先看一下原理圖油宜。

職責(zé)鏈模式原理圖

看代碼組織結(jié)構(gòu)。

代碼組織結(jié)構(gòu)

看代碼怜姿。

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:@"豬經(jīng)理"];
    HCDMajorManager *majon = [[HCDMajorManager alloc]initWithName:@"狗總監(jiān)"];
    HCDGenaralManager *genaral = [[HCDGenaralManager alloc]initWithName:@"蛤蟆總經(jīng)理"];
    common.superior = majon;
    majon.superior = genaral;
    
    HCDReuquest *request = [[HCDReuquest alloc]init];
    request.requestType = @"請(qǐng)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:@"請(qǐng)假"] && request.number < 10) {
        NSLog(@"%@處理了%@,時(shí)間是%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:@"請(qǐng)假"] && request.number < 50) {
        NSLog(@"%@處理了%@,時(shí)間是%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:@"請(qǐng)假"] && request.number < 500) {
        NSLog(@"%@處理了%@,時(shí)間是%ld",self.name,request.requestType,request.number);
    }
    else{
        NSLog(@"%@不同意%@,時(shí)間是%ld",self.name,request.requestType,request.number);
    }
}

@end

看結(jié)果慎冤。

2017-04-29 10:58:55.169 19職責(zé)鏈模式[1184:25440] 豬經(jīng)理處理了請(qǐng)假,時(shí)間是5
2017-04-29 10:58:55.170 19職責(zé)鏈模式[1184:25440] 狗總監(jiān)處理了請(qǐng)假,時(shí)間是20
2017-04-29 10:58:55.170 19職責(zé)鏈模式[1184:25440] 蛤蟆總經(jīng)理處理了請(qǐng)假,時(shí)間是220
2017-04-29 10:58:55.170 19職責(zé)鏈模式[1184:25440] 蛤蟆總經(jīng)理不同意請(qǐng)假,時(shí)間是1200

結(jié)論：思想。

二十沧卢、中介者模式——Mediator

??用一個(gè)中介對(duì)象來(lái)封裝一系列的對(duì)象交互蚁堤，中介者使各個(gè)對(duì)象不需要顯式地相互引用，從而使其耦合松散但狭，而且可以獨(dú)立地改變它們之間的交互披诗。先看一下原理示例圖。

中介者模式示例圖

下面看一下代碼結(jié)構(gòu)圖立磁。

中介者模式代碼組織結(jié)構(gòu)

下面看代碼呈队。

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

看結(jié)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

結(jié)論：思想唱歧。

后記

??今天是五一放假的第一天宪摧，起來(lái)的有點(diǎn)晚，大約十點(diǎn)多才起床颅崩，起來(lái)了以后才想起來(lái)有一篇還沒(méi)寫几于，就接著寫了，下午再寫一篇沿后，給23種設(shè)計(jì)模式一個(gè)了結(jié)沿彭，再次謝謝大家。

大海美圖

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