奇怪的核心数据反应 - 未检测NSManagedObject子类 [英] Weird Core Data Reaction - Not Detecting NSManagedObject Sub Classes

问题描述

在我的应用程序中，我使用核心数据似乎有一个非常古怪的错误。

There seems to be a very weird bug in my app in which I'm using Core Data.

我昨天关闭了这个项目，今天开始开发没有修改代码），现在每次我想添加一行到我的数据库，我得到一个异常说下面的类不是 NSManagedObject ，这是我可笑地确定不是真的，因为它是工作几天，第二，因为我自动生成为 NSManagedObject 子类。我尝试使用 Editor->在我的数据模型中创建NSManagedObject子类重新生成类，但它根本没有帮助我。

I closed the project yesterday, and started development today ( with no modifications in code ) and now every time I wanna add a row to my database, I get an exception saying the following class is not a subclass of NSManagedObject, which I'm ridiculously sure is not true, first because it was working for days, and second because I generated them automatically as NSManagedObject subclasses. I tried regenerating classes using Editor->Create NSManagedObject Subclasses in my data model, but it didn't help me at all.

这是很奇怪的，我得到这个异常的蓝色和所有的突然不在我的代码中的一行修改：（

It's really weird that I get this exception out of blue and all of a sudden WITHOUT EVEN A LINE OF MODIFICATION in my code :(

任何人有任何
感谢

Anybody got any idea ? I really appreciate any help. Thanks

BTW，这里有一些代码可能会有帮助：

BTW, Here're some code that may help :

错误：

由于未捕获异常而终止应用程序'NSInternalInconsistencyException'，reason：'Message 不是NSManagedObject的子类。

消息类头文件（自动生成）： >

Message Class Header File (Auto-Generated) :

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

@class File;

@interface Message : NSManagedObject

@property (nonatomic, retain) NSString * data;
@property (nonatomic, retain) NSDate * date;
@property (nonatomic, retain) NSString * fileId;
@property (nonatomic, retain) NSString * number;
@property (nonatomic, retain) NSString * status;
@property (nonatomic, retain) NSString * type;
@property (nonatomic, retain) NSString * xmppId;
@property (nonatomic, retain) File *contains;

@end

我尝试创建的方法一个新的邮件对象： sendXMPPMessage：（NSString *）messageStr containsFile：（NSData *）。

The method in which I try to create a new message object :

+ (void)sendXMPPMessage:(NSString *)messageStr containingFile:(NSData *)fileData toNumber:(NSString *)number
{
    if(fileData == nil)
    {
        NSString *newID = [self generateNewXMPPMessageID];

        SunBirdAppDelegate *appDelegate = (SunBirdAppDelegate *)[[UIApplication sharedApplication] delegate];
        [appDelegate sendXMPPMessage:messageStr withID:newID toNumber:number];

        NSMutableDictionary *messageDataDic = [[NSMutableDictionary alloc] init];

        [messageDataDic setObject:messageStr forKey:@"body"];
        [messageDataDic setObject:@"Outgoing" forKey:@"type"];
        [messageDataDic setObject:newID forKey:@"xmppId"];
        [messageDataDic setObject:@"Sending" forKey:@"status"];
        [messageDataDic setObject:[NSDate date] forKey:@"date"];
        [messageDataDic setObject:number forKey:@"number"];

        [Message messageWithMessageInfo:messageDataDic inManagedObjectContext:[appDelegate managedObjectContext]];
    }
    else
    {
        //Handle Database With File Data
    }
}

创建新邮件对象 - >在邮件类别上创建类别（Message + Create.m）：

+ (Message *)messageWithMessageInfo:(NSDictionary *)messageInfo inManagedObjectContext:(NSManagedObjectContext *)context
{
    SunBirdAppDelegate *appDelegate = (SunBirdAppDelegate *)[[UIApplication sharedApplication] delegate];

    Message *newMessage = nil;

    NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"Message"];
    request.predicate = [NSPredicate predicateWithFormat:@"xmppId = %@", [messageInfo objectForKey:@"msgId"]];
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"xmppId" ascending:YES];
    request.sortDescriptors = [NSArray arrayWithObject:sortDescriptor];

    NSError *error = nil;
    NSArray *matches = [context executeFetchRequest:request error:&error];

    if (!matches || ([matches count] > 1))
    {
        // handle error
    }
    else if ([matches count] == 0)
    {
        newMessage = [NSEntityDescription insertNewObjectForEntityForName:@"Message" inManagedObjectContext:context];
        newMessage.data = [messageInfo objectForKey:@"body"];
        newMessage.type = [messageInfo objectForKey:@"type"];
        newMessage.date = [messageInfo objectForKey:@"date"];
        newMessage.xmppId = [messageInfo objectForKey:@"xmppId"];
        newMessage.status = [messageInfo objectForKey:@"status"];
        newMessage.number = [messageInfo objectForKey:@"number"];

        if ( [[messageInfo allKeys] containsObject:@"fileId"] )
        {
            newMessage.fileId = [messageInfo objectForKey:@"fileId"];
            newMessage.contains = [messageInfo objectForKey:@"fileData"];
        }
        else
        {
            newMessage.fileId = NULL;
            newMessage.contains = NULL;
        }
    }
    else
    {
        newMessage = [matches lastObject];
        NSLog(@"WARNING : NO NEW MESSAGE STORED IN DB ! MESSAGE WITH SAME XMPPID RETURNED");
    }
    [appDelegate saveContext];
    return newMessage;
}

这是我被通知的行消息不是 NSManagedObject 的子类：

And this is the line on which I'm being informed Message is not a subclass of NSManagedObject :

newMessage = [NSEntityDescription insertNewObjectForEntityForName：@MessageinManagedObjectContext：context];

推荐答案

消息不能用于实体名...为​​什么？ ... Apple ... ???

Message cannot be used an an entity name ... why? ... Apple ... ???

不知道。

重命名为其他值，这通常可以解决问题。

Rename to something else and this usually solve the problem.

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