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xml parsing probs

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Started 2 months ago by kmkxcoder
Latest reply from abitofcode

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kmkxcoder
Member

i have xml parser in nsobject

and i parse this file



<songs>
<song filename="Enthiran/BoomBoomRoboDa.mp3" track="Boom Boom Robo Da" songid="120319112006" lyrics="Boom Boom Robo Da" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Enthiran/Kilimanjaro.mp3" track="Kilimanjaro Malaikani" songid="120319112633" lyrics="Kilimanjaro Malaikani" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Enthiran/ArimaArima.mp3" track="Arima Arima " songid="120319112920" lyrics="Arima Arima " singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Enthiran/ChittiDanceShowcase.mp3" track="Chitti Dance Showcase" songid="120319113609" lyrics="Chitti Dance Showcase" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Enthiran/KadalAnukkal.mp3" track="Kaadal Anukkal Udambil" songid="120319113716" lyrics="Kaadal Anukkal Udambil" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Enthiran/IrumbileOruIdhaiyam.mp3" track="Irumbile Oru Idhaiyam" songid="120319113846" lyrics="Irumbile Oru Idhaiyam" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Enthiran/PuthiyaManidha.mp3" track="Puthiya Manidha" songid="120319114012" lyrics="Puthiya Manidha" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120315222930" album="Enthiran"/>

<song filename="Varalaru/Thothapuram.mp3" track="Dhinam Dhinam Deepavali" songid="120728233857" lyrics="Dhinam Dhinam Deepavali" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

<song filename="Varalaru/Ilamai.mp3" track="Ilamai Vidukathai" songid="120729022117" lyrics="Ilamai Vidukathai" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

<song filename="Varalaru/Innisai.mp3" track="Innisai Azhakidaiyae" songid="120729022202" lyrics="Innisai Azhakidaiyae" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

<song filename="Varalaru/Innisai(remix).mp3" track="Innisai Azhakidaiyae Film Mix" songid="120729022246" lyrics="Innisai Azhakidaiyae Film Mix" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

<song filename="Varalaru/KammaKarayil.mp3" track="Kamma Karayil Umma" songid="120729022450" lyrics="Kamma Karayil Umma" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

<song filename="Varalaru/KatrilOruVaarthai.mp3" track="Katril Oru Vaarthai" songid="120729022529" lyrics="Katril Oru Vaarthai" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

<song filename="Varalaru/TheeyilVizhunda.mp3" track="Theeyil Vizundha" songid="120729022619" lyrics="Theeyil Vizundha" singer="A. R. Rahman" artist="A. R. Rahman" music="A. R. Rahman" albumid="120728050958" album="Varalaru"/>

</songs>

using attributeDict .And i store the album,filename,track in separate arrays ,
and when i nslog album array rather than showing it in an array it shows kinda like this


album array is (
    Varalaru
)
album array is (
    Varalaru
)
album array is (
    Varalaru
)

And when i call this array from nsobject to another viewcontroller tableview ,the album array returns empty ,where am i going wrong ,whats the exact way to parse the above XML . and how to remove duplicates from xml ?

Posted 2 months ago #

kmkxcoder
Member

and this is the code i use



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

{
    if ([elementName isEqualToString:@"song"])

        itemSelected = YES;

        TrackName = [[NSMutableString alloc]init];
        AlbumName = [[NSMutableString alloc]init];
        ArtistName = [[NSMutableString alloc]init];

    TrackName  = [attributeDict valueForKey:@"filename"];
     AlbumName  = [attributeDict valueForKey:@"album"] ;
    ArtistName = [attributeDict valueForKey:@"artist"];

}

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

    itemSelected = NO;

    if ([elementName isEqualToString:@"song"])

    AlbumArray = [[NSMutableArray alloc]init];
    TrackArray = [[NSMutableArray alloc]init];
    ArtistArray = [[NSMutableArray alloc]init];

    [TrackArray addObject:TrackName];

    [AlbumArray addObject:AlbumName];

    [ArtistArray addObject:ArtistName];

   NSLog(@"album array is %@",AlbumArray);

}

Posted 2 months ago #

mobilebros
Moderator

First of all completely get rid of the 2nd function (didEndElement). It's not needed and change the first function to look like this:

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

{
    if ([elementName isEqualToString:@"song"])
    {
        itemSelected = YES;

        TrackName  = [attributeDict objectForKey:@"filename"];
        AlbumName  = [attributeDict objectForKey:@"album"] ;
        ArtistName = [attributeDict objectForKey:@"artist"];

       [TrackArray addObject:TrackName];
       [AlbumArray addObject:AlbumName];
       [ArtistArray addObject:ArtistName];
   }
}

I'm not sure if there was some problem pasting but you didn't even have curly braces associated with your if statement....

Posted 2 months ago #

mobilebros
Moderator
Oh and do this part:
```
AlbumArray = [[NSMutableArray alloc]init];
    TrackArray = [[NSMutableArray alloc]init];
    ArtistArray = [[NSMutableArray alloc]init];
```
in your init or somewhere before parsing starts, and I'm not sure of the purpose of itemSelected so I can't really say what should happen with that.
Posted 2 months ago #
kmkxcoder
Member
@mobilebros
Thanks for replying , okay i tried and array returned null
```
44.506 Beats[2820:c07] album array is (null)
2013-02-22 11:07:44.507 Beats[2820:c07] album array is (null)
2013-02-22 11:07:44.507 Beats[2820:c07] album array is (null)
2013-02-22 11:07:44.508 Beats[2820:c07] album array is (null)
2013-02-22 11:07:44.508 Beats[2820:c07] album array is (null)
2013-02-22 11:07:44.508 Beats[2820:c07] album array is (null)
```
the code

-(id)loadXMLByURL:(NSString *)urlstring { NSURL *url = [NSURL URLWithString:urlstring]; NSData *data=[[NSData alloc]initWithContentsOfURL:url]; PARser = [[NSXMLParser alloc]initWithData:data]; PARser.delegate=self; [PARser parse]; TrackArray = [[NSMutableArray alloc]init]; ArtistArray = [[NSMutableArray alloc]init]; AlbumArray = [[NSMutableArray alloc]init]; AlbumName = [[NSMutableString alloc]init]; TrackName = [[NSMutableString alloc]init]; ArtistName = [[NSMutableString alloc]init]; return self; } (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { if ([elementName isEqualToString:@"song"]) { AlbumName = [attributeDict objectForKey:@"album"] ; TrackName = [attributeDict objectForKey:@"filename"]; ArtistName = [attributeDict objectForKey:@"artist"]; [AlbumArray addObject:AlbumName]; [TrackArray addObject:TrackName]; [ArtistArray addObject:ArtistName]; NSLog(@"album array is %@",AlbumArray); }
}

and i have a doubt

the array must be like this
album array { data 1 data 2 data 3 .... . . . }
but my album array generates like this

album array { data 1 } album array { data 2 }

pretty much help needed now !! is there any problem in allocating arrays?
Posted 2 months ago #

mobilebros
Moderator

You're allocating the array's after you called parse, so when your parse code gets hit the array's are still nil. Just move parse down to right above "return self".

-(id)loadXMLByURL:(NSString *)urlstring
{
NSURL *url = [NSURL URLWithString:urlstring];
NSData *data=[[NSData alloc]initWithContentsOfURL:url];
PARser = [[NSXMLParser alloc]initWithData:data];
PARser.delegate=self;

TrackArray = [[NSMutableArray alloc]init];
ArtistArray = [[NSMutableArray alloc]init];
AlbumArray = [[NSMutableArray alloc]init];
AlbumName = [[NSMutableString alloc]init];
TrackName = [[NSMutableString alloc]init];
ArtistName = [[NSMutableString alloc]init];

[PARser parse];

return self;

}

Posted 2 months ago #

kmkxcoder
Member

@mobilebros

seriously i don't know why i didn't think of that before !! you just made my day !

it is working !
so now my array looks like this
Enthiran, Enthiran, Enthiran, Enthiran, Enthiran, Enthiran, Enthiran, "Azhagiya Tamilmagan", "Azhagiya Tamilmagan", "Azhagiya Tamilmagan", "Azhagiya Tamilmagan", "Azhagiya Tamilmagan", Boys, Boys, Boys, Boys, Boys, Boys, Boys, "Kandukonden Kandukonden", "Kandukonden Kandukonden", "Kandukonden Kandukonden", "Kandukonden Kandukonden", "Kandukonden Kandukonden", "Kandukonden Kandukonden", "Kandukonden Kandukonden", "Kandukonden Kandukonden", Sivaji, Sivaji, Sivaji, Sivaji, Sivaji, Sivaji, Sivaji, Kadhalan, Kadhalan, Kadhalan, Kadhalan, Kadhalan, Kadhalan, }
so how to remove duplicates from the above array? .

and on the other hand , i want to call this array in another viewcontroller
so what i called using an object and nslogged it but returned nil ,

- (void)viewDidLoad {
NSLog(@"%@",xmlobj.AlbumArray); }

so again am going wrong in alloc ?

Posted 2 months ago #
kmkxcoder
Member

damn i used the "" tag y isn't it working :-O

Posted 2 months ago #
abitofcode
Administrator

You'll get a quicker (more relevant) response asking these questions on StackOverflow, or watching the StanfordU iPhone development course.

Posted 2 months ago #

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