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This article mainly introduces how to use C language to achieve POOO pattern related knowledge, the content is detailed and easy to understand, the operation is simple and fast, has a certain reference value, I believe that everyone after reading this article on how to use C language to achieve POOO pattern will have a harvest, let's take a look.

MyNotes project, as shown in figure 2. In the Xcode project navigation panel, there are 3 groups.

The code section is described below. In the dao group, the code for NoteDAO.h is as follows:

@ interface NoteDAO: NSObject

/ / Save data list

@ property (nonatomic,strong) NSMutableArray* listData

+ (NoteDAO*) sharedManager

/ / method of inserting memos

-(int) create: (Note*) model

/ / method of deleting memo

-(int) remove: (Note*) model

/ / the method of amending the memorandum

-(int) modify: (Note*) model

/ / method of querying all data

-(NSMutableArray*) findAll

/ / the method of querying data by primary key

-(Note*) findById: (Note*) model

@ end

In the above code, the listData attribute is used to hold the data in the data table, where each element is a Note object. The + (NoteDAO*) sharedManager method is used to obtain the NoteDAO singleton object. In the dao group, the code for NoteDAO.m is as follows:

NoteDAO also uses singleton design pattern to implement.

In the domain group, the code for Note is as follows, which has only two properties-- date is the date the memo was created, and content is the content of the memo:

/ /

/ / Note.h

/ /

# import

@ interface Note: NSObject

@ property (nonatomic, strong) NSDate* date

@ property (nonatomic, strong) NSString* content

@ end

/ /

/ / Note.m

/ /

# import "Note.h"

@ implementation Note

@ end

In the business logic layer BusinessLogicLayer, the code for NoteBL.h is as follows:

@ interface NoteBL: NSObject

/ / method of inserting memos

-(NSMutableArray*) createNote: (Note*) model

/ / method of deleting memo

-(NSMutableArray*) remove: (Note*) model

/ / method of querying all data

-(NSMutableArray*) findAll

@ end

Here is the code in NoteBL.m:

@ implementation NoteBL

/ / method of inserting memos

-(NSMutableArray*) createNote: (Note*) model

{

NoteDAO * dao = [NoteDAO sharedManager]

[dao create:model]

Return [dao findAll]

}

/ / method of deleting memo

-(NSMutableArray*) remove: (Note*) model

{

NoteDAO * dao = [NoteDAO sharedManager]

[dao remove:model]

Return [dao findAll]

}

/ / method of querying all data

-(NSMutableArray*) findAll

{

NoteDAO * dao = [NoteDAO sharedManager]

Return [dao findAll]

}

This is the end of the article on "how to implement POOO pattern in C language". Thank you for reading! I believe that everyone has a certain understanding of "how to use C language to achieve POOO mode" knowledge, if you want to learn more knowledge, welcome to follow the industry information channel.

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