NSXMLParser解析php的xml

 

// 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 :self withObject :[NSURL URLWithString :urlStr]];

}

-(void )parserData:(NSURL *)url

{

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

         NSXMLParser   *parser=[[NSXMLParser alloc ]  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:nil waitUntilDone:YES];

         }

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

         {

              self .currentString =[NSMutableString   string ];

         }

}

 

 

//found  character

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

{

    if ([currentElement isEqualToString :@"Id" ]){

      //   [currentString  appendString:string];

              // [currentString  appendString:@"   "];

         }

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

              // [currentString  appendString:string];

              // [currentString  appendString:@"   "];

         }

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

                [currentString   appendString :string];

              // [currentString  appendString:@"   "];

         }

         else if ([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  isEqualToStr ing:@"Id" ])

         {

         //   NSLog(curr entString);

         }

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

         //   NSLog(current String);

         }

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

         //   NSLog(cur rentString);

         }

         else if ([currentElement  isEqualToStri ng:@"Sex" ])

         {

         //   NSLog(cur rentString);

         }

         else if ([currentElem ent  isEqualTo String:@"Age"])

         {

              NSL og(currentString) ;

         }

} 

@end