iphone - CDATA Parsing Values -

i parsing cdata gettings values... http://nikelebron.net/feed/ , http://www.nicekicks.com/feed/ in both rss feeds want src value in tag

- (void)parser:(nsxmlparser *)parser foundcdata:(nsdata *)cdatablock {  nsstring *somestring = [[nsstring alloc] initwithdata:cdatablock                                             encoding:nsutf8stringencoding]; } 

this code print jpg image links in cdata,

-(void) parser:(nsxmlparser *)parser foundcdata:(nsdata *)cdatablock{     nsstring *cdatastring = [[nsstring alloc] initwithdata:cdatablock encoding:nsutf8stringencoding];     nsdatadetector *detect = [[nsdatadetector alloc] initwithtypes:nstextcheckingtypelink error:nil];     nsarray *matches = [detect matchesinstring:cdatastring options:0 range:nsmakerange(0, [cdatastring length])];      for(int i=0; i<matches.count;i++){       nstextcheckingresult *result = [matches objectatindex:i];       nsstring *linkurl = [result url].absolutestring;         if([[linkurl pathextension] isequaltostring:@"jpg"]){       //for requirement, change above line       //nsstring *pathextension = [linkurl pathextension];       //if((pathextension.length>=3)&&([[pathextension substringtoindex:3] isequaltostring:@"jpg"])){        nslog(@"image link:%@", linkurl);       }else nslog(@"link:%@", linkurl);      } }