ios中GDataXML解析XML文档

参考文章 http://blog.csdn.net/ryantang03/article/details/7868246

适合解析一个节点多个属性要用GDataXml 格式如下

<?xml version="1.0" encoding="UTF-8"?>

<result spend_time="16ms">>

<data>

<item wait_count="4"max_wait_time="10"branch_id="0">

<item wait_count="0"max_wait_time="7" branch_id="232051000" />

<item wait_count="0"max_wait_time="4" branch_id="232051001" />

</item>

</data>

</result>

   NSString *path=[[NSBundle mainBundle] pathForResource:@"" ofType:@"xml"];
   NSData *data=[[NSData alloc] initWithContentsOfFile:path];
    GDataXMLDocument *doc=[[GDataXMLDocument alloc] initWithData:data options: error:nil];
    //获取根节点
    GDataXMLElement *rootElement=doc.rootElement;

    NSArray *arr=[rootElement nodesForXPath:@"//item/item" error:nil];
    for (GDataXMLElement *ele in arr) {
        NSLog(@"-->%@--->%@",[[ele attributeForName:@"wait_count"]stringValue],[[ele attributeForName:@"branch_name"]stringValue]);
    }

一个节点一个属性，推荐使用下面方法

<?xml version="1.0" encoding="utf-8"?>

<Users>

<User id="001">

<name>Ryan</name>

<age>24</age>

</User>

<User id="002">

<name>Tang</name>

<age>23</age>

</User>

</Users>

封装方法

#import <Foundation/Foundation.h>

@protocol UseXmlParser <NSObject>

@optional
- (void)NetWorkBackConnectID:(int)connectID BackDic:(NSMutableDictionary*)aBackDic WithNetState:(int)netState;

@end

@interface UseXmlParser : NSObject<NSXMLParserDelegate>
{
    id aTarget;
    int aConnectId;

    NSMutableData *parData;

    NSXMLParser *xmlParser;

    NSMutableArray *dicNameArray;
    BOOL endStringElement;
    NSMutableString *keyString;
    NSMutableDictionary *xmlDataSource;
}
-(id)initWithParserData:(NSData*)pData target:(id)toTarget connectId:(int)bConnectId;

-(void)parser;

@end

==========
#import "UseXmlParser.h"

@implementation UseXmlParser

-(id)initWithParserData:(NSData*)pData target:(id)toTarget connectId:(int)bConnectId{
    if (self = [super init]) {

        aTarget = toTarget;
        aConnectId = bConnectId;

        dicNameArray = [[NSMutableArray alloc] initWithCapacity:];
        keyString = [[NSMutableString alloc] initWithCapacity:];
        xmlDataSource=[[NSMutableDictionary alloc] initWithCapacity:];
        endStringElement = FALSE;

        parData = [[NSMutableData alloc] initWithData:pData];

    }
    return self;
}
-(void)parser{
    xmlParser = [[NSXMLParser alloc] initWithData:parData];
    [xmlParser setDelegate:self];
    [xmlParser parse];//开始解析
    [xmlParser release];
}

-(NSMutableDictionary*) getDic {
    NSMutableDictionary *dic=xmlDataSource;
    for (int i=; i<[dicNameArray count]; i++) {
        dic=[dic objectForKey:(NSString*)[dicNameArray objectAtIndex:i]];
    }
    return dic;
}
- (NSString*)getListElement:(NSString*)elementName From:(NSArray*)array {
    NSString *temp = elementName;
    for (int i=; i<; i++) {
        if ([array containsObject:elementName]) {
            elementName = [NSString stringWithFormat:@"%@%d", temp, i+];
        }
        else {
            return elementName;
        }
    }
    return nil;
}
- (id)getStringByKey:(NSString*)key {
    NSArray *array = [key componentsSeparatedByString:@"/"];
    NSDictionary *dic = [NSDictionary dictionary];
    for (int i=; i<[array count]-; i++) {
        dic = [dic objectForKey:[array objectAtIndex:i]];
    }
    NSString *temp = [dic objectForKey:[array objectAtIndex:[array count]-]];
    if (!temp) {
        temp = @"";
    }
    return temp;
}
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{
    if ([dicNameArray count]>) {
        NSMutableDictionary *dic = [self getDic];
        elementName = [self getListElement:elementName From:[dic allKeys]];

        [dic setObject:[[NSMutableDictionary alloc] init] forKey:elementName];
        [dicNameArray addObject:elementName];
    }
    else {
        [xmlDataSource setObject:[[NSMutableDictionary alloc] init] forKey:elementName];
        [dicNameArray addObject:elementName];
    }

    endStringElement = TRUE;
    [keyString setString:@""];
}

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
    [keyString appendString:string];
}
- (NSMutableDictionary*)getLastDic {
    NSMutableDictionary *dic=xmlDataSource;
    for (int i=; i<[dicNameArray count]-; i++) {
        dic=[dic objectForKey:(NSString*)[dicNameArray objectAtIndex:i]];
    }
    return dic;
}
-(void) removeLastDic {
    if ([dicNameArray count]>) {
        [dicNameArray removeLastObject];
    }
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
    if (endStringElement) {
        if (![keyString isEqualToString:@"\n"]) {
            if ([keyString hasPrefix:@"\n"]) {
                [keyString setString:[keyString substringFromIndex:]];
            }
            NSMutableDictionary *dic = [self getLastDic];
            [dic setObject:[NSString stringWithString:keyString] forKey:[dicNameArray objectAtIndex:[dicNameArray count]-]];
        }
    }

    [keyString setString:@""];
    endStringElement = FALSE;
    [self removeLastDic];

}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
    NSLog(@" \nxml解析返回-->> %@",xmlDataSource);
    if (aTarget && [aTarget respondsToSelector:@selector(NetWorkBackConnectID:BackDic:WithNetState:)]) {
        [aTarget NetWorkBackConnectID:aConnectId BackDic:xmlDataSource WithNetState:];
    }
}

-(void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError{
    NSLog(@"--error-->%@",parseError.localizedDescription);
}
-(void)dealloc{

    [dicNameArray release];
    [keyString release];
    [xmlDataSource release];
    [super dealloc];
}
@end

使用方式

- (IBAction)click:(id)sender {

    UseXmlParser *parser1=[[UseXmlParser alloc] initWithParserData:data target:self connectId:];
    [parser1 parser];
    [parser1 release];
}

- (void)NetWorkBackConnectID:(int)connectID BackDic:(NSMutableDictionary*)aBackDic WithNetState:(int)netState{
    NSLog(@"--%@",aBackDic);
}