XMLパーサー

ヘッダー

@interface XMLParserWrapper : NSObject <NSXMLParserDelegate> {
    NSString *searchElementString;
}

- (void)parseXMLFileAtURL:(NSURL *)URL parseError:(NSError **) error ;
- (void)parseXMLFileAtData:(NSData *)data parseError:(NSError **) error ;

@end

実装

@implementation XMLParserWrapper

//URLで解析
- (void)parseXMLFileAtURL:(NSURL *)URL parseError:(NSError **) error {
    NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:URL];
    [self parseXMLFile:parser parseError:error];
}

//Dataで解析
- (void)parseXMLFileAtData:(NSData *)data parseError:(NSError **) error {
    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
    [self parseXMLFile:parser parseError:error];
}

- (void)parseXMLFile:(NSXMLParser *)parser parseError:(NSError **) error {
    [parser setDelegate:self];
    [parser setShouldProcessNamespaces:NO];
    [parser setShouldReportNamespacePrefixes:NO];
    [parser setShouldResolveExternalEntities:NO];
    [parser parse];
    NSError *parseError = [parser parserError];
    if (parseError && error) {
        *error = parseError;
    }
    [parser release];
}

- (void)parserDidStartDocument:(NSXMLParser *)parser {
    searchElementString = nil;
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
    if ([elementName isEqualToString:@"取得したい属性名"]) {
        searchElementString = [NSString stringWithString:elementName];
    }
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

    if ([elementName isEqualToString:@"取得したい属性名"]) {
        searchElementString = nil;
    }
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
    if ([searchElementString isEqualToString:@"取得したい属性名"]) {
        //stringに取得したい属性の値
    }
}

@end

使い方

NSError *parseError = nil;
XMLParserWrapper *parser = [[XMLParserWrapper alloc] init];
[parser parseXMLFileAtData:receivedData parseError:&parseError];

if (parseError) {
    //parseエラー
    NSLog(@"Parse Error->%@", parseError);
}