Objective-c Factory mode (bottom)--Abstract Factory mode

Compared to the simple factory model, only one factory can produce the mobile phone is also fixed

The abstract factory model is similar to having many factories that create a factory to produce when a user wants to buy a cell phone.

For example, a user who wants to buy an iphone creates an apple factory to produce a mobile phone, and a goolge factory to buy an Android phone.

This creates the factory, the factory, the user this is what we have to consider (in fact, there is a cell phone, this is skipped in the Simple Factory mode)

Create a factory to have a management object to automatically create the appropriate plant according to the customer's needs

The factory is only responsible for the production of mobile phones.

Now to build the code

Write a basic factory model first

BaseFactory.h

  1   #import  <foundation/ Foundation.h> 2   3   @interface   basefactory:nsobject   4   5  /*  *   6   Create phone method   7   8   @return return the phone object   9  */ 10 -(id  ) Createphone;  11  12   @end 

Basefactory.m

1 #import "BaseFactory.h"2 3 @implementationbasefactory4 5- (ID) Createphone {6     7     //You can add code again to prohibit Basefactory calling this method directly8     //only subclasses are allowed to invoke9     returnNil;Ten } One  A @end

To create an Apple factory

AppleFactory.h

1 #import " BaseFactory.h " 2 3 @interface applefactory:basefactory 4 5 @end

Applefactory.m

1 #import "AppleFactory.h"2 3 @implementationapplefactory4 5- (ID) Createphone {6     7NSLog (@"create an Apple phone");8     //this should be for the project. Add phone model, create and return phone object9     //now it's just an example of not realizing this part .Ten     returnNil; One } A  - @end

Create a Google factory

GoogleFactory.h

1 #import " BaseFactory.h " 2 3 @interface googlefactory:basefactory 4 5 @end

Googlefactory.m

1 #import "GoogleFactory.h"2 3 @implementationgooglefactory4 5- (ID) Createphone {6     7NSLog (@"Create a Google phone");8     //this should be for the project. Add phone model, create and return phone object9     //now it's just an example of not realizing this part .Ten     returnNil; One } A  - @end

Here's the factory manager.

FactoryManager.h is responsible for creating factories to produce according to user's requirement.

1 #import<Foundation/Foundation.h>2 #import "AppleFactory.h"3 #import "GoogleFactory.h"4 5typedefenum: Nsuinteger {6Kapple =0x1,7 Kgoogle,8 } efactorytype;9 Ten @interfaceFactorymanager:nsobject One  A /** - Create a phone factory -  the @param type Factory category - @return Return factory objects -  */ -+ (ID) Createfactorywithtype: (efactorytype) type; +  - @end

Factorymanager.m

1 #import "FactoryManager.h"2 3 @implementationFactorymanager4 5+ (ID) Createfactorywithtype: (efactorytype) type {6     7Basefactory *Factory;8     if(Type = =kapple) {9         TenFactory =[[Applefactory alloc] init]; One          A}Else if(Type = =kgoogle) { -          -Factory =[[Googlefactory alloc] init]; the          -     } -      -     returnFactory; + } -  + @end

Here is the implementation

1 #import "ViewController.h"2 #import "FactoryManager.h"3 4 @interfaceViewcontroller ()5 6 @end7 8 @implementationViewcontroller9 Ten- (void) Viewdidload { One      A [Super Viewdidload]; -      -     //Create a factory theApplefactory *factory =[Factorymanager createfactorywithtype:kapple]; -      -     //Factory production cell phone - [Factory Createphone]; +      - } +  A  at  - @end

Abstract Factory mode is more flexible than simple Factory mode

Objective-c Factory mode (bottom)--Abstract Factory mode