objective-c – 将100MB XML文件导入iOS核心数据模型

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
这是一次性操作,仅在模拟器中运行,并且不会与最终应用程序一起部署.

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.
>按照本教程,预先填充核心数据以供发货:How To Preload/Import Existing Data

相关文章

在有效期内的苹果开发者账号(类型为个人或者公司账号)。还...
Appuploader官网--IOS ipa上传发布工具,证书制作工具跨平台...
苹果在9月13号凌晨(北京时间)发布 iOS 16,该系统的设备可...
计算机图形学--OpenGL递归实现光线追踪
Xcode 14打出来的包在低版本系统运行时会崩溃,报错信息是Li...