如何写入XML文件?

无耻的自我提升: KSXMLWriter

我建议使用 KissXML . 作者从与您类似的情况开始,围绕libxml创建了一个NSXML兼容的API包装器。他讨论了选择和决定 here 在他的博客上。

尝试开放源码 XML stream writer for iOS :

• 用Objective-C编写,一个.h.和.m文件
• 一个@协议用于命名空间支持,一个用于

例子:

// allocate serializer
XMLWriter* xmlWriter = [[XMLWriter alloc]init];

// start writing XML elements
[xmlWriter writeStartElement:@"Root"];
[xmlWriter writeCharacters:@"Text content for root element"];
[xmlWriter writeEndElement];

// get the resulting XML string
NSString* xml = [xmlWriter toString];

这将生成以下XML字符串:

<Root>Text content for root element</Root>

这是NSSTRING大楼的家庭作业。抽象地说,创建一个协议,比如:

@protocol XmlExport
-(NSString*)xmlElementName;
-(NSString*)xmlElementData;
-(NSDictionary*)xmlAttributes;
-(NSString*)toXML;
-(NSArray*)xmlSubElements;
@end

确保要保存的所有内容都实现了它,并使用如下内容构建XML:

-(NSString*)toXML {
    NSMutableString *xmlString;
    NSString *returnString;

    /* Opening tag */
    xmlString = [[NSMutableString alloc] initWithFormat:@"<%@", [self xmlElementName]];
    for (NSString *type in [self xmlAttributes]) {
        [xmlString appendFormat:@" %@=\"%@\"", type, [[self xmlAttributes] valueForKey:type]];
    }   
    [xmlString appendString:@">"];

    /* Add subelements */
    for (id<XmlExport> *s in [self xmlSubElements]) {
        [xmlString appendString:[s toXML]];
    }

    /* Data */
    if ([self xmlElementData]) {
        [xmlString appendString:[self xmlElementData]];
    }

    /* Close it up */
    [xmlString appendFormat:@"</%@>", [self xmlElementName]];

    /* Return immutable, free temp memory */
    returnString = [NSString stringWithString:xmlString];
    [xmlString release]; xmlString = nil;

    return returnString;
}