Question

我有一个以下的xml文件。我想解析元素current_date_time，condition，humidity，icon，wind_condition，low，high。所有这些元素都包含属性。我知道如何解析一个简单的xml文件。但所有这些元素都包含属性值。

那我该如何解析这个xml文件呢？

    <?xml version="1.0" ?> 
    <xml_api_reply version="1">
        <weather module_id="0" tab_id="0" mobile_row="0" mobile_zipped="1" row="0" section="0">
            <forecast_information>
                <city data="" /> 
                <postal_code data="" /> 
                <latitude_e6 data="50500000" /> 
                <longitude_e6 data="30500000" /> 
                <forecast_date data="2011-05-27" /> 
                <current_date_time data="2011-05-27 04:30:00 +0000" /> 
                <unit_system data="US" /> 
            </forecast_information>
            <current_conditions>
                <condition data="Clear" /> 
                <temp_f data="57" /> 
                <temp_c data="14" /> 
                <humidity data="Humidity: 59%" /> 
                <icon data="http://g0.gstatic.com/images/icons/onebox/weather_sunny-40.gif" /> 
                <wind_condition data="Wind: S at 9 mph" /> 
            </current_conditions>
            <forecast_conditions>
                <day_of_week data="Fri" /> 
                <low data="54" /> 
                <high data="72" /> 
                <icon data="http://g0.gstatic.com/images/icons/onebox/weather_partlycloudy-40.gif" /> 
                <condition data="Mostly Sunny" /> 
            </forecast_conditions>
            <forecast_conditions>
                <day_of_week data="Sat" /> 
                <low data="52" /> 
                <high data="79" /> 
                <icon data="http://g0.gstatic.com/images/icons/onebox/weather_partlycloudy-40.gif" /> 
                <condition data="Mostly Sunny" /> 
            </forecast_conditions>
            <forecast_conditions>
                <day_of_week data="Sun" /> 
                <low data="55" /> 
                <high data="84" /> 
                <icon data="http://g0.gstatic.com/images/icons/onebox/weather_partlycloudy-40.gif" /> 
                <condition data="Mostly Sunny" /> 
            </forecast_conditions>
            <forecast_conditions>
                <day_of_week data="Mon" /> 
                <low data="63" /> 
                <high data="84" /> 
                <icon data="http://g0.gstatic.com/images/icons/onebox/weather_partlycloudy-40.gif" /> 
                <condition data="Mostly Sunny" /> 
            </forecast_conditions>
        </weather>
    </xml_api_reply>


    Please help me in solving this problem. Thanks. Can anybody provide me any sample code on this?


i have done this code to parse the above xml file but my problem is checks only the first xml tag i.e the root element xml_ap_reply for every checking

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


if ([elementName isEqualToString:@"xml_api_reply"])
    {
        mWeather = [[TWeatherElement alloc]init];


    }

     if([elementName isEqualToString:@"current_date_time"])
    {
         NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


         [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }

     if([elementName isEqualToString:@"condition"])
    {
        NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


        [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }

     if([elementName isEqualToString:@"humidity"])
    {
        NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


        [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }

     if([elementName isEqualToString:@"icon"])
    {
        NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


        [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }   
     if([elementName isEqualToString:@"wind_condition"])
    {
        NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


        [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }

     if([elementName isEqualToString:@"low"])
    {
        NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


        [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }

     if([elementName isEqualToString:@"high"])
    {
        NSMutableArray *temp=[[NSMutableArray alloc]init];
        self.mParserArray=temp;
        [temp release];


        [mParserArray addObject:[attributeDict valueForKey:@"data"]];

    }

请帮我解决这个问题。谢谢

Answer 1

假设<postal_code data="" /> 你需要数据值，所以你需要做的是：

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

    if([elementName isEqualToString:@"postal_code"])
    {
        NSMutableArray *temp = [[NSMutableArray alloc] init];
        self.registrationResponseArray = temp;
        [temp release];

        [registrationResponseArray addObject:[attributeDict valueForKey:@"data"]];  
    }
}

[attributeDict valueForKey:@"data"]将为您提供属性值，然后您可以添加任何位置（无论您使用的是什么结构）。

Answer 2

您可以使用DDXML解析器并只使用此

[[Element attributeForName:@"url"] stringValue];

其中attributeForName是您可以使用的函数。这个（DDXML）是一个非常好的libxml解析器。

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