问题描述
如您所见,“ ZMESSAGEID”字段包含值“ CLUBID_7y919898983003160187157002002eeee1qzg6eeieguz47tqvm67rs377jjb_gft.jpg”应具有1条记录,而不是3条记录。当我尝试使用托管对象进行更新并保存上下文后,出现以下附件图像在coredata中。
当没有相关消息的数据(CLUBID_7y919898983003160160187157002809ee1qzg6eeieguz47tqvm67rs377jjb_gft.jpg)出现时,它是使用以下代码插入的:
`
[self scheduleBlock:^{
archivedMessage = (XMPPMessageArchiving_Message_CoreDataObject *)
[[NSManagedobject alloc] initWithEntity:[self messageEntity:moc]
insertIntoManagedobjectContext:nil];
[moc insertObject:archivedMessage];
}];
`
上传图片后,我尝试使用以下代码段将“ ZFILEUPLOADED”字段设置为0:
NSManagedobjectContext *context = [HQXMPPManager shareXMPPManager].msgStorage.mainThreadManagedobjectContext;
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"XMPPMessageArchiving_Message_CoreDataObject"];
NSError *error = nil;
nspredicate *pre = [nspredicate predicateWithFormat:@"messageId = %@",messageId];
NSLog(@"QUERY For messageId: %@ %@",pre,messageId);
request.predicate = pre;
NSArray *aryResults = [context executeFetchRequest:request error:&error];
for (XMPPMessageArchiving_Message_CoreDataObject *msg in aryResults)
{
[msg setValue:@"0" forKey:@"fileUploaded"];
NSError *err = nil;
[context save:&err];
}
解决方法
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