iOS开发系列--详细介绍数据存取

以上模型创建后，接下来就是根据上面的模型文件（.xcdatamodeld文件）生成具体的实体类。在Xcode中添加“NSManagedObject Subclass”文件，按照步骤选择创建的模型及实体，Xcode就会根据所创建模型生成具体的实体类。

User.h

//
// User.h
// CoreData
//
// Created by Kenshin Cui on 14/03/27.
// Copyright (c) 2014年 cmjstudio. All rights reserved.
//

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

@class Status;

@interface User : NSManagedObject

@property (nonatomic, retain) NSString * city;
@property (nonatomic, retain) NSString * mbtype;
@property (nonatomic, retain) NSString * name;
@property (nonatomic, retain) NSString * profileImageUrl;
@property (nonatomic, retain) NSString * screenName;
@property (nonatomic, retain) NSSet *statuses;
@end

@interface User (CoreDataGeneratedAccessors)

- (void)addStatusesObject:(Status *)value;
- (void)removeStatusesObject:(Status *)value;
- (void)addStatuses:(NSSet *)values;
- (void)removeStatuses:(NSSet *)values;

@end

//
// User.m
// CoreData
//
// Created by Kenshin Cui on 14/03/27.
// Copyright (c) 2014年 cmjstudio. All rights reserved.
//

#import "User.h"
#import "Status.h"


@implementation User

@dynamic city;
@dynamic mbtype;
@dynamic name;
@dynamic profileImageUrl;
@dynamic screenName;
@dynamic statuses;

@end

//
// Status.h
// CoreData
//
// Created by Kenshin Cui on 14/03/27.
// Copyright (c) 2014年 cmjstudio. All rights reserved.
//

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


@interface Status : NSManagedObject

@property (nonatomic, retain) NSDate * createdAt;
@property (nonatomic, retain) NSString * source;
@property (nonatomic, retain) NSString * text;
@property (nonatomic, retain) NSManagedObject *user;

@end

//
// Status.m
// CoreData
//
// Created by Kenshin Cui on 14/03/27.
// Copyright (c) 2014年 cmjstudio. All rights reserved.
//

#import "Status.h"


@implementation Status

@dynamic createdAt;
@dynamic source;
@dynamic text;
@dynamic user;

@end