NSXMLParser解析php的xml

cz-sjm

// parser  xml

解析xml需要NSXMLParserDelegate 协议，然后再实现类中完成重写parser等方法

NSAutoreleasePool这个一定要有，不然会报错

一定要记得，在分析XML的时候，xml格式是如下的话,是从item开始读取，而不是aaa表节点，不然只读取依次循环就没有了。

<item>

   <aaa>

         <tt>  fsdfs</tt>

         <bb>fsdlkfjkls</bb>

   </aaa>

  <aaa>

         <tt>  fdsfds</tt>

         <bb>fwefwwe</bb>

   </aaa>

</item>

//interface  

#import <Foundation/Foundation.h>

@interface IVPaserXMLSingleton :NSObject<NSXMLParserDelegate> {

         NSMutableString *currentString;

         NSString  *currentElement;

}

@property  (nonatomic,retain)NSMutableString  *currentString;

@property  (nonatomic,retain)NSString       *currentElement;

-(void)getData:(NSString*)urlStr;

@end

 

 

 

//implements  class

#import "IVPaserXMLSingleton.h"

#import "UserInfo.h"

@implementation IVPaserXMLSingleton

@synthesize currentString,currentElement;

-(void)getData:(NSString*)urlStr

{

         [NSThread  detachNewThreadSelector:@selector(parserData:) toTarget:selfwithObject:[NSURLURLWithString:urlStr]];

}

-(void)parserData:(NSURL*)url

{

         NSAutoreleasePool *pool=[[NSAutoreleasePool  alloc]  init];

         NSXMLParser *parser=[[NSXMLParseralloc]  initWithContentsOfURL:url];

         [parser  setDelegate:self];

         [parser  setShouldProcessNamespaces:YES];

         [parser  setShouldReportNamespacePrefixes:YES];

         [parser  setShouldResolveExternalEntities:NO];

         [parser  parse];

         [pool  drain];

}

 

 

//start element

- (void)parser:(NSXMLParser*)parser didStartElement:(NSString*)elementName

  namespaceURI:(NSString*)namespaceURI qualifiedName:(NSString*)qName

         attributes:(NSDictionary*)attributeDict

{

         [currentElement release];

         currentElement=[elementName  copy];

         //NSLog(qName);

         //NSLog(@"I Jus found  a start tag for%@",elementName);

     if([currentElement  isEqualToString:@"item"])

         {

              //NSLog(@"begin");

              //[self performSelectorOnMainThread:@selector(create) withObject:nilwaitUntilDone:YES];

         }

         elseif([currentElementisEqualToString:@"UserInfo"])

         {

              self.currentString=[NSMutableString string];

         }

}

 

 

//found character

-(void)parser:(NSXMLParser*)parser foundCharacters:(NSString*)string

{

    if([currentElementisEqualToString:@"Id"]){

      //  [currentString appendString:string];

              // [currentString appendString:@"   "];

         }

    elseif([currentElementisEqualToString:@"UserId"]) {

              // [currentString appendString:string];

              // [currentString appendString:@"   "];

         }

         elseif([currentElementisEqualToString:@"Name"]) {

               [currentString  appendString:string];

              // [currentString appendString:@"   "];

         }

         elseif([currentElement isEqualToString:@"Sex"])

         {

              // [currentString appendString:string];

              // [currentString appendString:@"   "];

         }

         else  if([currentElement  isEqualToString:@"Age"])

         {

              //[currentString appendString:string];

              //[currentString appendString:@"   "];

         }

}

 

 

//parser over

-(void)parserDidEndDocument:(NSXMLParser*)parser

{

         NSLog(@"Document  finished!!!");

}

 

 

//end element

-(void)parser:(NSXMLParser*)parser didEndElement:(NSString*)elementName

  namespaceURI:(NSString*)namespaceURI qualifiedName:(NSString*)qName

{

         if([elementName  isEqualToString:@"Id"])

         {

         //   NSLog(currentString);

         }

         else if ([currentElement isEqualToString:@"UserId"]){

         //   NSLog(currentString);

         }

    else if ([currentElement isEqualToString:@"Name"]){

         //   NSLog(currentString);

         }

         else if([currentElement isEqualToString:@"Sex"])

         {

         //   NSLog(currentString);

         }

         else if([currentElement  isEqualToString:@"Age"])

         {

              NSLog(currentString);

         }

} 

@end