使用NSXMLParser解析XML

工程截图：

ViewController.h

//
//  ViewController.h
//  NSXMLParserDemo
//
//  Created by Fox on 12-3-15.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>


@interface ViewController : UIViewController<NSXMLParserDelegate>

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

@end

ViewController.m

//
//  ViewController.m
//  NSXMLParserDemo
//
//  Created by Fox on 12-3-15.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//
/*
 <?xml version="1.0" encoding="UTF-8"?>
 <users>
 <user name="fox" age="22" />
 <user name="foxbabe" age="21" />
 </users>
 */



#import "ViewController.h"

@implementation ViewController

- (void)viewDidLoad
{
    NSLog(@"viewDidLoad");
    [super viewDidLoad];
    
    NSMutableString *Strxml=[NSMutableString stringWithString:@"<?xml version=\"1.0\" encoding=\"UTF-8\"?><users><user name=\"fox\" age=\"22\" /><user name=\"foxbabe\" age=\"21\" /></users>"];
    NSData *data=[NSData dataWithBytes:[Strxml UTF8String] length:[Strxml length]];
    
    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data]; //设置XML数据
    [parser setDelegate:self];
    [parser setShouldProcessNamespaces:NO];
    [parser setShouldReportNamespacePrefixes:NO];
    [parser setShouldResolveExternalEntities:NO];
    [parser parse];//开始解析
    
    
}


#pragma mark NSXMLParserDelegate methods
/*
 *开始解析XmL
 */
- (void)parserDidStartDocument:(NSXMLParser *)parser
{
    // 解析开始时的处理
    NSLog(@"parserDidStartDocument");
}

/*
 *遍历xml节点
 */
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
    NSLog(@"didStartElement");
    NSLog(@"Element:%@",elementName);
    //NSLog(@"qualifiedName:%@",qName);
    if (qName) {
        elementName = qName;
    }
    if ([elementName isEqualToString:@"user"]) {
        // 输出属性值
        NSLog(@"Name is %@ , Age is %@", [attributeDict objectForKey:@"name"], [attributeDict objectForKey:@"age"]);
    }
}

/*
 *当遇到结束标记时，调用该方法
 */
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
    NSLog(@"didEndElement");
    NSLog(@"EndElement:%@",elementName);
    //NSLog(@"qualifiedName:%@",qName);
    if (qName) {
        elementName = qName;
    }
}


/*
 *当xml节点有值时，调用此函数
 */
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    NSLog(@"foundCharacters");
    NSLog(@"Value:%@",string);
}

/*
 *结束XML解析
 */
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
    NSLog(@"parserDidEndDocument");

}

@end

运行结果：