XML file not parsing using NSXMLParser in iOS

StackOverflow https://stackoverflow.com/questions/19089802

  •  29-06-2022
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سؤال

I am developing an app that streams radio stations to the app. The radio station names and links are stored in a XML file that looks like the following:

<radiostacionet>
<radio>
<emri>Radio Gurbeti</emri>
<frekuenca>N/A</frekuenca>
<linku>http://192.184.9.79:8218</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiogurbeti.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>43</min>
<sec>00</sec>
</dateandtime>
<website>http://www.radiogurbeti.com/</website>
</radio>
<radio>
<emri>Radio STAR</emri>
<frekuenca>96.4 FM</frekuenca>
<linku>http://radio.1dhe1.com:9400</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiostargjilani.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>42</min>
<sec>02</sec>
</dateandtime>
<website>http://www.radiostargjilan.com/</website>
</radio>
<radio>
<emri>Radio VALA RINORE</emri>
<frekuenca>94.7 Fm</frekuenca>
<linku>http://84.22.46.10:8000/</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiovalarinore.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>41</min>
<sec>07</sec>
</dateandtime>
<website>http://www.valarinore.net/</website>
</radio>
<radio>
<emri>Radio Islame</emri>
<frekuenca>N/A</frekuenca>
<linku>http://server5.digital-webstream.de:33725</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radioislame.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>35</min>
<sec>13</sec>
</dateandtime>
<website>http://www.radiovizioni.net/</website>
</radio>
<radio>
<emri>Radio Vizioni</emri>
<frekuenca>88.1 FM</frekuenca>
<linku>http://www.vera-ks.com:9222/</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiovizioni.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>34</min>
<sec>35</sec>
</dateandtime>
<website>http://www.radiovizioni.net/</website>
</radio>
<radio>
<emri>Radio Zëri Mitrovices</emri>
<frekuenca>N/A</frekuenca>
<linku>http://209.105.250.73:8202/</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiomitrovica.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>33</min>
<sec>40</sec>
</dateandtime>
<website>http://radiomitrovica.eu/</website>
</radio>
<radio>
<emri>Radio Ferizaj</emri>
<frekuenca>N/A</frekuenca>
<linku>http://87.106.23.138:2012</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radioferiziaj.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>32</min>
<sec>52</sec>
</dateandtime>
<website>http://www.radioferizaji.net/</website>
</radio>
<radio>
<emri>Radio Gjakova</emri>
<frekuenca>N/A</frekuenca>
<linku>http://82.114.80.202:8000/</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiogjakova.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>31</min>
<sec>45</sec>
</dateandtime>
<website>http://www.radiogjakova.info/</website>
</radio>
<radio>
<emri>Radio Marimanga</emri>
<frekuenca>N/A</frekuenca>
<linku>http://91.82.85.71:9084/</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiomarimanga.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>30</min>
<sec>59</sec>
</dateandtime>
<website>http://www.radiomarimanga.com/</website>
</radio>
<radio>
<emri>Radio Kosova e Lire</emri>
<frekuenca>N/A</frekuenca>
<linku>http://www.radiokosovaelire.com/</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiokosovaelire.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>30</min>
<sec>05</sec>
</dateandtime>
<website>http://www.radiokosovaelire.com/</website>
</radio>
<radio>
<emri>Radio Love</emri>
<frekuenca>N/A</frekuenca>
<linku>http://91.121.23.6:8030</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiolove.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>29</min>
<sec>34</sec>
</dateandtime>
<website>http://dukagjini.com</website>
</radio>
<radio>
<emri>Radio Shqip</emri>
<frekuenca>N/A</frekuenca>
<linku>http://91.121.23.6:8020</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radioshqip.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>29</min>
<sec>12</sec>
</dateandtime>
<website>http://dukagjini.com</website>
</radio>
<radio>
<emri>Radio HIT</emri>
<frekuenca>N/A</frekuenca>
<linku>http://91.121.23.6:8010</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/radiohit.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>13</hour>
<min>27</min>
<sec>56</sec>
</dateandtime>
<website>http://dukagjini.com</website>
</radio>
<radio>
<emri>Radio Kosova</emri>
<frekuenca>99.99</frekuenca>
<linku>http://stream2.rtkit.com:8088</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/3_rating_not_important.png
</image>
<dateandtime>
<day>27</day>
<month>09</month>
<year>2013</year>
<hour>10</hour>
<min>48</min>
<sec>34</sec>
</dateandtime>
<website>rtklive.com</website>
</radio>
<radio>
<emri>Radio dukagjini</emri>
<frekuenca>99.6</frekuenca>
<linku>http://s1.voscast.com:8226</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/3_rating_important.png
</image>
<dateandtime>
<day>26</day>
<month>09</month>
<year>2013</year>
<hour>16</hour>
<min>52</min>
<sec>01</sec>
</dateandtime>
<website>google.com</website>
</radio>
<radio>
<emri>Radio Bluesky</emri>
<frekuenca>101.2</frekuenca>
<linku>http://stream2.rtkit.com:8098</linku>
<image>
http://localhost/Apps/An/Shqipcom/data/source/img/radio/cio_feed_logo.png
</image>
<dateandtime>
<day>26</day>
<month>09</month>
<year>2013</year>
<hour>11</hour>
<min>25</min>
<sec>22</sec>
</dateandtime>
<website>example.com</website>
</radio>
</radiostacionet>

I am using NSXMLParser to parse the XML and I want to extract the name and link from the document (emri and linku).

In my RadioViewController.h file I declared the following variables:

@interface RadioViewController : UIViewController <NSXMLParserDelegate>

{
    NSMutableArray *_idName;
    NSMutableArray *_idLink;
    BOOL isRadio;
}

In the RadioViewConrtoller.m file i wrote the following code:

- (void)viewDidLoad
{
    [super viewDidLoad];

    _idName = [[NSMutableArray alloc] init];
    _idLink = [[NSMutableArray alloc] init];

    NSURL *URL = [NSURL URLWithString:@"my_link"];
    NSXMLParser * parser = [[NSXMLParser alloc] initWithContentsOfURL:URL];
    [parser setDelegate:self];
    [parser parse];
}

An finally the parser methods:

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

    if ([elementName isEqualToString:@"radio"]) {
        isRadio = YES;
    }
    else if ([elementName isEqualToString:@"radio"] && isRadio){
        NSString *idString = [attributeDict objectForKey:@"emri"];
        NSString *isbnString = [attributeDict objectForKey:@"linku"];
        [_idName addObject:idString];
        [_idLink addObject:isbnString];
        NSLog(@"Radio id is: %@ and Link is: %@",idString,isbnString);
    }
}

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

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

    if ([elementName isEqualToString:@"emri"]) {
        isRadio=NO;
        NSLog(@"Id Array count is :%d",[_idName count]);
    }
}

No the problem is when I run the application i get the following log message: enter image description here

Any help would be greatly appreciated because i can't see what i might be doing wrong here.

Thanks a lot.

Granit

هل كانت مفيدة؟

المحلول

Typo!

if ([elementName isEqualToString:@"radio"] && isRadio){

Should be:

if ([elementName isEqualToString:@"emri"] && isRadio){
//                                 ^^^^

Also isRadio should really be inRadio, to be more descriptive.

نصائح أخرى

In your code, the else if condition in the didStartElement method will not be executed.because already you checking element name is radio in if condition. So your else if condition holds the non-radio elements. So the objects are not adding to the array. Change the code as like

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

    if ([elementName isEqualToString:@"radio"] && isRadio) {
        NSString *idString = [attributeDict objectForKey:@"emri"];
        NSString *isbnString = [attributeDict objectForKey:@"linku"];
        [_idName addObject:idString];
        [_idLink addObject:isbnString];
        NSLog(@"Radio id is: %@ and Link is: %@",idString,isbnString);

    }
    else if ([elementName isEqualToString:@"radio"] && !isRadio){
       isRadio = YES;
    }
}
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