objective-c – 将100MB XML文件导入iOS核心数据模型
发布时间:2020-12-14 17:11:15 所属栏目:百科 来源:网络整理
导读:在我的应用程序中,我需要将100MB xml文件导入到核心数据模型中. 到目前为止,我已经导入了一个100KB的xml文件,一切正常.但是,不确定导入100MB xml需要多长时间.我会在一段时间内运行它.你觉得这种做法好吗? 谢谢 NSManagedObjectContext * context = [self m
在我的应用程序中,我需要将100MB xml文件导入到核心数据模型中.
到目前为止,我已经导入了一个100KB的xml文件,一切正常.但是,不确定导入100MB xml需要多长时间.我会在一段时间内运行它.你觉得这种做法好吗? 谢谢 NSManagedObjectContext * context = [self managedObjectContext]; // Delete all documents NSFetchRequest * fetch = [[[NSFetchRequest alloc] init] autorelease]; [fetch setEntity:[NSEntityDescription entityForName:@"Document" inManagedObjectContext:context]]; NSArray * result = [context executeFetchRequest:fetch error:nil]; for (id basket in result) [context deleteObject:basket]; //Insert documents TBXML * tbxml = [[TBXML tbxmlWithXMLFile:@"categ_small.xml"] retain]; TBXMLElement * root = tbxml.rootXMLElement; TBXMLElement * doc = [TBXML childElementNamed:@"doc" parentElement:root]; do { TBXMLElement * idDoc = [TBXML childElementNamed:@"id" parentElement:doc]; TBXMLElement * titleDoc = [TBXML childElementNamed:@"title" parentElement:doc]; TBXMLElement * descriptionDoc = [TBXML childElementNamed:@"description" parentElement:doc]; TBXMLElement * time = [TBXML childElementNamed:@"time" parentElement:doc]; TBXMLElement * tags = [TBXML childElementNamed:@"tags" parentElement:doc]; TBXMLElement * geo = [TBXML childElementNamed:@"geo" parentElement:doc]; TBXMLElement * event = [TBXML childElementNamed:@"event" parentElement:doc]; TBXMLElement * user = [TBXML childElementNamed:@"user" parentElement:doc]; TBXMLElement * categ = [TBXML childElementNamed:@"categ" parentElement:doc]; NSManagedObject *newDocument = [NSEntityDescription insertNewObjectForEntityForName:@"Document" inManagedObjectContext:context]; [newDocument setValue:[TBXML textForElement:idDoc] forKey:@"idDoc"]; [newDocument setValue:[TBXML textForElement:titleDoc] forKey:@"titleDoc"]; [newDocument setValue:[TBXML textForElement:descriptionDoc] forKey:@"descriptionDoc"]; [newDocument setValue:[TBXML textForElement:time] forKey:@"time"]; [newDocument setValue:[TBXML textForElement:tags] forKey:@"tags"]; [newDocument setValue:[TBXML textForElement:geo] forKey:@"geo"]; [newDocument setValue:[TBXML textForElement:event] forKey:@"event"]; [newDocument setValue:[TBXML textForElement:user] forKey:@"user"]; [newDocument setValue:[TBXML textForElement:categ] forKey:@"categ"]; } while ((doc = doc->nextSibling)); UPDATE 解决方法
我会做以下步骤:
>使用ruby或php编写转换器XML-> SQLite,或者如果您不是脚本语言的朋友,那么看看SQLite Manager它是一个管理SQLite数据库的Firefox插件,它能够导入XML. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |