IOS开发解析XML

系统有提供的XML解析类，NSXMLParser，但是不是很不好用啊，该类只会以协议的方式通知扫描时所遇到的XML元素，而且该XML数据的层次关系也看不出来，刚刚封装了一个XML解析功能，直接可以得到根结点，然后就可以查看子结点了。

NSXMLParser+Cobbler.h

////  NSXMLParser+Cobbler.h//  ////  Created by yangjianhong-MAC on 11-12-31.//  Copyright (c) 2011年 __MyCompanyName__. All rights reserved.//  QQ:18222469//#import <Foundation/Foundation.h>#pragma mark -#pragma mark XMLNode@interface XMLNode : NSObject {@private        NSString *_strNodeName;//结点名称    NSDictionary *_dicAttributes;//结点属性    NSMutableArray *_arrayChild;//子结点    NSString *_strNodeValue;//结点值    NSUInteger _nodeDepth;    XMLNode *_nodeParent;//父结点}@property (nonatomic, copy) NSString *nodeName;@property (nonatomic, copy) NSDictionary *nodeAttributesDict;@property (nonatomic, readonly) NSArray *children;@property (nonatomic, copy) NSString *nodeValue;@property (nonatomic, readonly) NSUInteger nodeDepth;@property (nonatomic, assign) XMLNode *nodeParent;- (void)clear;@end#pragma mark -#pragma mark NSXMLParser Cobbler@interface NSXMLParser (Cobbler)+ (XMLNode *)parseToXMLNode:(NSData *)dataXML;@end

NSXMLParser+Cobbler.m

////  NSXMLParser+Cobbler.m//  ////  Created by yangjianhong-MAC on 11-12-31.//  Copyright (c) 2011年 __MyCompanyName__. All rights reserved.//  QQ:18222469//#import "NSXMLParser+Cobbler.h"#pragma mark -#pragma mark XMLNode@implementation XMLNode@synthesize nodeName = _strNodeName, nodeValue = _strNodeValue;@synthesize nodeAttributesDict = _dicAttributes, nodeDepth = _nodeDepth;#pragma mark Override//20120610增加- (void)dealloc{    [_strNodeName release];    [_dicAttributes release];    [_strNodeValue release];    _nodeParent = nil;        [super dealloc];}- (NSArray *)children{    if (_arrayChild.count > 0) {        return [NSArray arrayWithArray:_arrayChild];    }    else {        return nil;    }}- (void)setNodeParent:(XMLNode *)nodeParent{    _nodeParent = nodeParent;    //计算本结点的深度    if (nil == nodeParent) {        //父结点为nil，当前结点深度为0        _nodeDepth = 0;    }    else {        //当前结点深度为父结点深度+1        _nodeDepth = nodeParent.nodeDepth + 1;    }    //更新子结点的深度    if (_arrayChild.count > 0) {        //遍历子结点        for (XMLNode *nodeChild in _arrayChild) {            //通过设置父结点的方式更新子结点深度            nodeChild.nodeParent = self;        }    }}- (XMLNode *)nodeParent{    return _nodeParent;}- (NSString *)description{    if (_strNodeName.length == 0) {        return @"";    }        NSMutableString *mstrDescription = [NSMutableString string];    //表示深度的空格字符    NSMutableString *mstrSpace = [[NSMutableString alloc] init];    for (int i = 0; i < _nodeDepth; i++) {        [mstrSpace appendString:@" "];    }    [mstrDescription appendString:mstrSpace];    //结点的名称    [mstrDescription appendFormat:@"\r\n%@<%@", mstrSpace, _strNodeName];    //结点的属性    NSArray *arrayKeys = [_dicAttributes allKeys];    for (NSString *strKey in arrayKeys) {        [mstrDescription appendFormat:@" \"%@\"=\"%@\"", strKey, [_dicAttributes objectForKey:strKey]];    }    [mstrDescription appendString:@">"];    //结点的值    if (_strNodeValue.length > 0) {        [mstrDescription appendFormat:@"%@", _strNodeValue];    }    //子结点部分    if (_arrayChild.count > 0) {        //遍历所有子结点        for (XMLNode *nodeChild in _arrayChild) {            //子结点描述串            [mstrDescription appendFormat:@"%@", nodeChild];        }        [mstrDescription appendFormat:@"\r\n%@", mstrSpace];    }    //结点的结束    [mstrDescription appendFormat:@"</%@>", _strNodeName];    [mstrSpace release];    //    return mstrDescription;}#pragma mark Public- (void)addChildNode:(XMLNode *)childNode{    if (nil == _arrayChild) {        _arrayChild = [NSMutableArray arrayWithCapacity:5];    }    //    [_arrayChild addObject:childNode];}- (void)clear{    NSArray *arrayChild = [self children];    //遍历所有子结点    for (XMLNode *node in arrayChild) {        //清空子结点的数据        [node clear];    }    //清空当前结点数据    _nodeDepth = 0;    self.nodeName = nil;    self.nodeValue = nil;    self.nodeAttributesDict = nil;    self.nodeParent = nil;    //清空子结点表    [_arrayChild removeAllObjects];}@end#pragma mark -#pragma mark XMLParser interface@interface XMLParser : NSObject <NSXMLParserDelegate> {@private        XMLNode *_rootNode;    XMLNode *_currentNode;}- (XMLNode *)parse:(NSData *)dataXML;@end#pragma mark -#pragma mark XMLParser implementation@implementation XMLParser- (XMLNode *)parse:(NSData *)dataXML{    _rootNode = nil;    _currentNode = nil;    //    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:dataXML]; //设置XML数据    [parser setShouldProcessNamespaces:NO];    [parser setShouldReportNamespacePrefixes:NO];    [parser setShouldResolveExternalEntities:NO];    [parser setDelegate:self];    [parser parse];    [parser release];//20120610增加        return _rootNode;}#pragma mark NSXMLParserDelegate- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName   namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{    NSLog(@"element start:%@",elementName);    //    if (nil == _rootNode) {        //创建根结点        _rootNode = [[[XMLNode alloc] init] autorelease];        _rootNode.nodeName = elementName;        _rootNode.nodeAttributesDict = attributeDict;        _rootNode.nodeParent = nil;        //        _currentNode = _rootNode;    }    else {        //        XMLNode *nodeChild = [[XMLNode alloc] init];        nodeChild.nodeName = elementName;        nodeChild.nodeAttributesDict = attributeDict;        nodeChild.nodeParent = _currentNode;        //        [_currentNode addChildNode:nodeChild];        _currentNode = nodeChild;        [nodeChild release];    }}- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{    //去掉字符串首尾的空字符    NSString *strValidValue = [string stringByTrimmingCharactersInSet:                               [NSCharacterSet whitespaceAndNewlineCharacterSet]];    NSLog(@"element value:%@",strValidValue);    _currentNode.nodeValue = strValidValue;}- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName   namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{    NSLog(@"element end.");    //    _currentNode = _currentNode.nodeParent;}- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError{    NSLog(@"parse error:%@", parseError);    _rootNode = nil;}@end#pragma mark -#pragma mark NSXMLParser Cobbler@implementation NSXMLParser (Cobbler)+ (XMLNode *)parseToXMLNode:(NSData *)dataXML{    XMLParser *parser = [[XMLParser alloc] init];    XMLNode *node = [parser parse:dataXML];    [parser release];    return node;}@end

为了方便，以及想类名的麻烦，只是给NSXMLParser写了个分类，静态方法，参数为NSData，返回类型为XMLNode。

有什么问题，或者使用不方便的找我哇