应用程序在 CoreData [NsManagedObjectContext] 中崩溃答案

【问题标题】：App get Crash in the CoreData [NsManagedObjectContext]应用程序在 CoreData [NsManagedObjectContext] 中崩溃
【发布时间】：2015-12-04 12:17:27
【问题描述】：

应用程序在 MyCrashApp 行上崩溃。此崩溃随机发生在应用程序上。我正在尝试从服务器加载数据并使用 CoreData 将它们存储在表中，然后将其呈现在 UIview 上。

在 Crittercism 中显示 SIGSEGV 错误

0   CoreFoundation       0x00000001825edc20 __CFBasicHashDrain + 192
1   CoreData             0x000000018228b1a0 -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 2092
2   CoreData             0x0000000182289df4 -[NSManagedObjectContext save:] + 164
3   MyCrashApp           0x0000000100109548 0x0000000100090000 + 496968
4   MyApp                0x0000000100104198 0x0000000100090000 + 475544
5   MyApp                0x00000001000dfdf0 0x0000000100090000 + 327152
6   MyApp                0x00000001000eacbc 0x0000000100090000 + 371900
7   libdispatch.dylib    0x00000001978996e8 _dispatch_call_block_and_release + 20
8   libdispatch.dylib    0x00000001978996a8 _dispatch_client_callout + 12
9   libdispatch.dylib    0x00000001978a7b40 _dispatch_root_queue_drain + 2136
10  libdispatch.dylib    0x00000001978a72dc _dispatch_worker_thread3 + 108
11  libsystem_pthread.dylib   0x0000000197aad470 _pthread_wqthread + 1088
12  libsystem_pthread.dylib   0x0000000197aad020 start_wqthread + 0

这部分代码可能会崩溃

NSError *error;
[[[CoredataHelper sharedInstance] managedObjectContext] save:&error];

我正在尝试存储来自服务器的值

- (void) addArticle:(NSDictionary *) ArticleDict
{
    ArticleData * objArticleData = [NSEntityDescription insertNewObjectForEntityForName:NSStringFromClass([ArticleData class]) inManagedObjectContext:[[CoredataHelper sharedInstance] managedObjectContext]];
    [objArticleData setArticle:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_ARTICLE] != nil && ArticleDict[READ_ARTICLES_ARTICLE] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_ARTICLE]:@""]];
    [objArticleData setArticle_id:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_ID] != nil && ArticleDict[READ_ARTICLES_ID] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_ID]:@""]];
    [objArticleData setArticle_title:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_TITLE] != nil && ArticleDict[READ_ARTICLES_TITLE] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_TITLE]:@""]];
    [objArticleData setArticle_type:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_ARTICLE_TYPE] != nil && ArticleDict[READ_ARTICLES_ARTICLE_TYPE] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_ARTICLE_TYPE]:@""]];
    [objArticleData setArticle_author:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_AUTHOR] != nil && ArticleDict[READ_ARTICLES_AUTHOR] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_AUTHOR]:@""]];
    [objArticleData setArticle_categories:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_CATEGORIES] != nil && ArticleDict[READ_ARTICLES_CATEGORIES] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_CATEGORIES]:@""]];
    [objArticleData setArticle_categoryIds:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_CATEGORY_IDS] != nil && ArticleDict[READ_ARTICLES_CATEGORY_IDS] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_CATEGORY_IDS]:@""]];
    [objArticleData setArticle_countries:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_COUNTRIES] != nil && ArticleDict[READ_ARTICLES_COUNTRIES] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_COUNTRIES]:@""]];
    [objArticleData setArticle_description:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_DESCRIPTION] != nil && ArticleDict[READ_ARTICLES_DESCRIPTION] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_DESCRIPTION]:@""]];
    [objArticleData setArticle_excerpt:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_EXCERPT] != nil && ArticleDict[READ_ARTICLES_EXCERPT] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_EXCERPT]:@""]];
    [objArticleData setArticle_feedmapid:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_FEED_MAP_ID] != nil && ArticleDict[READ_ARTICLES_FEED_MAP_ID] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_FEED_MAP_ID]:@""]];
    [objArticleData setArticle_image:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_IMAGE] != nil && ArticleDict[READ_ARTICLES_IMAGE] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_IMAGE]:@""]];
    [objArticleData setArticle_restImage:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_RESTIMAGE] != nil && ArticleDict[READ_ARTICLES_RESTIMAGE] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_RESTIMAGE]:@""]];
    [objArticleData setArticle_name:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_NAME] != nil && ArticleDict[READ_ARTICLES_NAME] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_NAME]:@""]];
    [objArticleData setArticle_languageId:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_LANGUAGEID] != nil && ArticleDict[READ_ARTICLES_LANGUAGEID] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_LANGUAGEID]:@""]];
    if ((ArticleDict[READ_ARTICLES_NEWS_DATE] != nil && ArticleDict[READ_ARTICLES_NEWS_DATE] != (id)[NSNull null]))
    {
        [objArticleData setArticle_date:[NSString stringWithFormat:@"%@",ArticleDict[READ_ARTICLES_NEWS_DATE]]];
    }
    [objArticleData setArticle_newssecdiff:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_NEWS_SEC_DIFF] != nil && ArticleDict[READ_ARTICLES_NEWS_SEC_DIFF] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_NEWS_SEC_DIFF]:@""]];
    [objArticleData setArticle_news_approved_secdiff:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_NEWS_APPROVED_SEC_DIFF] != nil && ArticleDict[READ_ARTICLES_NEWS_APPROVED_SEC_DIFF] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_NEWS_APPROVED_SEC_DIFF]:@""]];
    [objArticleData setArticle_stateIds:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_STATE_IDS] != nil && ArticleDict[READ_ARTICLES_STATE_IDS] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_STATE_IDS]:@""]];
    [objArticleData setArticle_states:[NSString stringWithFormat:@"%@",(ArticleDict[READ_ARTICLES_STATES] != nil && ArticleDict[READ_ARTICLES_STATES] != (id)[NSNull null])?ArticleDict[READ_ARTICLES_STATES]:@""]];
    NSError *error;
    [[[CoredataHelper sharedInstance] managedObjectContext] save:&error];
}

任何帮助将不胜感激！

【问题讨论】：

可以看一下相关部分的代码吗？
已添加相关部分代码。
崩溃报告的标题部分是什么样的？应该有关于导致 SEGV 问题的原因的信息。
您正在使用一些线程来保存。请问，你能描述一下你的背景吗？
我正在尝试存储从服务器获取的值并将它们添加到文章表中。

标签： ios core-data nsmanagedobject segmentation-fault crittercism

【解决方案1】：

似乎您在后台线程上调用addArticle（大概是您的网络服务交付数据后的回调）。

您需要在后台上下文中执行此操作。修改您的 addArticle 方法，使其也采用用于插入和保存的上下文参数。

NSManagedObjectContext *context = [[NSManagedObjectContext alloc] 
    initWithConcurrencyType: NSPrivateQueueConcurrencyType];
context.parentContext = [[CoredataHelper sharedInstance] managedObjectContext];
[context performBlockAndWait:^{
    [self addArticle: dataDictionary inContext: context]
}];

在此之后，您可能还需要保存主上下文，只需确保在主线程上执行此操作，例如通过使用 GCD。

【讨论】：