xml格式文件解析

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<!-- lang: cpp -->
@interface pyViewController ()<NSXMLParserDelegate>

{

NSMutableString *_string ;
NSMutableArray *_array;
pyWeather *_w;

}
@end

/*
项目分析
1.先取出数据
2.再将数据显示到地图上，
/

@implementation pyViewController

• (void)viewDidLoad
  {
  [super viewDidLoad];
  [self xmlHTTPRequestWithString:@“北京”];
  }

-(void)xmlHTTPRequestWithString:(NSString *)str {

//1.url
NSString *urlString = @"http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/getWeather";
NSURL *url = [NSURL URLWithString:urlString];
//2.urlrequest
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:5.0f];
urlRequest.HTTPMethod = @"post";
NSString *datastring = [NSString stringWithFormat:@"theCityCode=%@&theUserID=",str];
urlRequest.HTTPBody = [datastring dataUsingEncoding:NSUTF8StringEncoding] ;
//3.发送
[NSURLConnection sendAsynchronousRequest:urlRequest queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:data];
    parser.delegate = self;
    [parser parse];
}];

}

pragma mark -xml解析方法

pragma mark 开始文档解析

-(void)parserDidStartDocument:(NSXMLParser *)parser
{

_string = [NSMutableString string];
_array = [NSMutableArray array];

}

pragma mark 开始节点解析

-(void)parser:(NSXMLParser )parser didStartElement:(NSString )elementName namespaceURI:(NSString )namespaceURI qualifiedName:(NSString )qName attributes:(NSDictionary *)attributeDict
{

if ([elementName isEqualToString:@"ArrayOfString"]) {
    [_array removeAllObjects];
}

}

pragma mark 真正解析

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

 [_string appendString:string];

}

pragma mark 完成借点解析

-(void)parser:(NSXMLParser )parser didEndElement:(NSString )elementName namespaceURI:(NSString )namespaceURI qualifiedName:(NSString )qName
{

if ([elementName isEqualToString:@"string" ]) {
    //NSLog(@"%@",_string);
    NSString *result = [NSString stringWithString: _string];
    [_array addObject:result];
}

}

pragma mark 结束解析

-(void)parserDidEndDocument:(NSXMLParser *)parser
{

NSLog(@"%@",_string);

}

pragma mark 解析错误时

-(void)parser:(NSXMLParser )parser parseErrorOccurred:(NSError )parseError
{

NSLog(@"the reason of faile is %@",parseError.localizedDescription);

}

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