Question

可能重复：
it's a google weather api?how to parse such kind of data using NSXML?

我正在尝试制作天气应用。我能够获得google weather api，返回以下XML输出（抱歉格式错误）

<?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="Detroit, MI"/><postal_code data="Detroit"/><latitude_e6 data=""/><longitude_e6 data=""/><forecast_date data="2012-02-09"/><current_date_time data="2012-02-09 21:53:00 +0000"/><unit_system data="US"/></forecast_information><current_conditions><condition data="Clear"/><temp_f data="37"/><temp_c data="3"/><humidity data="Humidity: 48%"/><icon data="/ig/images/weather/sunny.gif"/><wind_condition data="Wind: SW at 15 mph"/></current_conditions><forecast_conditions><day_of_week data="Thu"/><low data="25"/><high data="40"/><icon data="/ig/images/weather/sunny.gif"/><condition data="Clear"/></forecast_conditions><forecast_conditions><day_of_week data="Fri"/><low data="13"/><high data="38"/><icon data="/ig/images/weather/snow.gif"/><condition data="Snow Showers"/></forecast_conditions><forecast_conditions><day_of_week data="Sat"/><low data="18"/><high data="23"/><icon data="/ig/images/weather/mostly_sunny.gif"/><condition data="Mostly Sunny"/></forecast_conditions><forecast_conditions><day_of_week data="Sun"/><low data="20"/><high data="27"/><icon data="/ig/images/weather/mostly_sunny.gif"/><condition data="Mostly Sunny"/></forecast_conditions></weather></xml_api_reply>

我能够从XML获得当前临时值，这是我无法获得的其余时间的临时值。我阅读了苹果文档并搜索了相当多，但我不知道如何使用苹果NSXMLParser api解析这个字符串。我不想处理其他外部解析器或将它们包含在我的项目中，因为我的需求非常简单。以下是我到目前为止实施的代码

- (IBAction)GetCurrentWeather
{

    NSString * location =  @"Detroit";
    NSString * address = @"http://www.google.co.uk/ig/api?weather=";
    NSString * request = [NSString stringWithFormat:@"%@%@",address,location];
    NSURL *URL = [NSURL URLWithString:request];
    NSError *error;    
    NSString *XML = [NSString stringWithContentsOfURL:URL encoding:NSASCIIStringEncoding error:&error];

    //NSLog(@"XML: %@", XML);

    // Extract current temperature the 'dirty' way
    //NSString *tempInC = [[[[XML componentsSeparatedByString:@"temp_c data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *tempInF = [[[[XML componentsSeparatedByString:@"temp_f data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *city = [[[[XML componentsSeparatedByString:@"city data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    //NSString *condition = [[[[XML componentsSeparatedByString:@"condition data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *humidity = [[[[XML componentsSeparatedByString:@"humidity data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *wind = [[[[XML componentsSeparatedByString:@"wind_condition data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];

    NSString *dayOfWeek = [[[[XML componentsSeparatedByString:@"day_of_week data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];

    //NSLog(@"It's dayOfWeek %@", dayOfWeek);
    //NSLog(@"It's tempInC %@ degrees", tempInC);
    //NSLog(@"It's tempInF %@ degrees", tempInF);
    //NSLog(@"It's city %@", city);
    //NSLog(@"It's condition %@", condition);

    NSString *tempStrToDisp = [NSString stringWithFormat: @"Temp: %@F", tempInF];

//THIS ALL WORKS!!!
        textLable1.text = city;
        textLable2.text = tempStrToDisp;
        textLable3.text = humidity;
        textLable4.text = wind;

    NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:URL];
    [parser setDelegate:self];
    [parser parse];

}


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

    NSLog(@"XML Parser 1 ...");
    NSLog(@"elementName ... %@", elementName);




//HOW TO GET rest of the week high/low temp VALUES HERE?
 }

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

    NSLog(@"XML Parser 2 ...");

    //HOW TO GET VALUES HERE?
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName 
{
    NSLog(@"XML Parser 3 ...");
    //HOW TO GET VALUES HERE?
}

Answer 1

如果将来其他任何人都有兴趣解析这个XML字符串，那么就好了。如果它适合你，请评价我的答案

-(IBAction) GetLocalWeather
{

  NSString *location = @"Detroit";
 NSString *address = @"http://www.google.co.uk/ig/api?weather=";
    NSString *request = [NSString stringWithFormat:@"%@%@",address,location];
    NSURL *URL = [NSURL URLWithString:request];
    NSError *error;    
    NSString *XML = [NSString stringWithContentsOfURL:URL encoding:NSASCIIStringEncoding error:&error];

    //NSLog(@"XML: %@", XML);

    // Extract current temperature the 'dirty' way
    NSString *tempInC = [[[[XML componentsSeparatedByString:@"temp_c data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *tempInF = [[[[XML componentsSeparatedByString:@"temp_f data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *city = [[[[XML componentsSeparatedByString:@"city data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *condition = [[[[XML componentsSeparatedByString:@"condition data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *humidity = [[[[XML componentsSeparatedByString:@"humidity data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];
    NSString *wind = [[[[XML componentsSeparatedByString:@"wind_condition data=\""] objectAtIndex:1] componentsSeparatedByString:@"\""] objectAtIndex:0];

arryDataMutable = [[NSMutableArray alloc] init];

    //TEST
    NSXMLParser *parser = [[NSXMLParser alloc] initWithContentsOfURL:URL];
    [parser setDelegate:self];
    [parser parse];

    int arrySizInt = [arryDataMutable count];
    //NSLog(@"[arryDataMutable count]: %d", arrySizInt);



    /* Weather Conditions 
     Clear 
     Cloudy 
     Fog
     Haze 
     Light Rain
     Mostly Cloudy 
     Overcast 
     Partly Cloudy
     Rain 
     Rain Showers 
     Showers
     Thunderstorm 
     Chance of Showers 
     Chance of Snow 
     Chance of Storm 
     Mostly Sunny
     Partly Sunny 
     Scattered Showers 
     Sunny
     */

    //We will only get 4 day forecast including current day

    //initialize counter
    int counter = 0;

    //skip first entry, its always current day condition
    for (int i=1; i<arrySizInt; i++)
    {
        //NSLog(@"Array: %@", [arryDataMutable objectAtIndex:i]);

        NSString *dayStr = [[NSString alloc] initWithString:[arryDataMutable objectAtIndex:i]];

        //all week-days
        if ([dayStr isEqualToString:@"Mon"] ||
            [dayStr isEqualToString:@"Tue"] ||
            [dayStr isEqualToString:@"Wed"] ||
            [dayStr isEqualToString:@"Thu"] ||
            [dayStr isEqualToString:@"Fri"] ||
            [dayStr isEqualToString:@"Sat"] ||
            [dayStr isEqualToString:@"Sun"] )
        {

            //NSLog(@"counter: %d", counter);

            //get the next 3 values from the array
            //Its always going to be a pair of 4 values
            NSString *lowStr = [[NSString alloc] initWithString:[arryDataMutable objectAtIndex:(i+1)]];
            NSString *highStr = [[NSString alloc] initWithString:[arryDataMutable objectAtIndex:(i+2)]];
            NSString *conditionStr = [[NSString alloc] initWithString:[arryDataMutable objectAtIndex:(i+3)]];

            NSString *tempStrToDisp = [NSString stringWithFormat: @"%@ H:%@ L:%@", dayStr, highStr, lowStr];


            //cell-1
            if (counter == 0)
            {

                textLable1.text = tempStrToDisp;

            }

            //cell-2
            if (counter == 1)
            {

                textLable2.text = tempStrToDisp;
            }

            //cell-3
            if (counter == 2)
            {

                textLable3.text = tempStrToDisp;
            }

            //cell-4
            if (counter == 3)
            {

                textLable4.text = tempStrToDisp;
            }

            //increment
            //This will only get incremented 4 times
            counter = counter + 1;
        }


    }//End-for-loop
}

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

    //NSLog(@"XML Parser 1 ... elementName ... %@", elementName);


    if ([elementName isEqualToString:@"day_of_week"]) 
    { 
        NSString *tempStr = [attributeDict objectForKey:@"data"]; 
        //NSLog(@"day-of-week: %@", tempStr);

        [arryDataMutable addObject:tempStr];

    }

    if ([elementName isEqualToString:@"low"]) 
    { 
        NSString *tempStr = [attributeDict objectForKey:@"data"]; 
        [arryDataMutable addObject:tempStr];

    }

    if ([elementName isEqualToString:@"high"]) 
    { 
        NSString *tempStr = [attributeDict objectForKey:@"data"]; 
        [arryDataMutable addObject:tempStr];

    }

    if ([elementName isEqualToString:@"condition"]) 
    { 
        NSString *tempStr = [attributeDict objectForKey:@"data"]; 
        [arryDataMutable addObject:tempStr];
    }



}

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

    //NSLog(@"XML Parser 2 ...");
    //NSLog(@"string ... %@", string);

}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName 
{
    //NSLog(@"XML Parser 3 ...");
    //NSLog(@"elementName: %@", elementName);
    //NSLog(@"namespaceURI: %@", namespaceURI);
    //NSLog(@"qName: %@", qName);
}

使用NSXMLParser解析谷歌天气XML

1 个答案: