ios - Write ID3 Tags with OBJC -

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so need write new id3 tags audio file. try use 2 methods.

first.

i used core audio, , read tags, 

-(void)getinformationaudiofile { //get title , artist information audio file  //read raw id3tag size uint32 id3datasize = 0; char *rawid3tag = null; audiofilegetpropertyinfo(inputfile,                          kaudiofilepropertyid3tag,                          &id3datasize,                          null);  rawid3tag = (char *)malloc(id3datasize);  //read raw id3tag audiofilegetproperty(inputfile,                      kaudiofilepropertyid3tag,                      &id3datasize,                      rawid3tag);  cfdictionaryref pidict = nil; uint32 pidatasize = sizeof(pidict);  //this key returns other dictionary, works in ipod library audioformatgetproperty(kaudioformatproperty_id3tagtodictionary,                        id3datasize,                        rawid3tag,                        &pidatasize,                        &pidict);  free(rawid3tag);  nsdictionary *tagsdictionary = (__bridge nsdictionary*)pidict;  nslog (@"dictionary: %@", tagsdictionary);  self->_title = [tagsdictionary objectforkey:@"tit2"]; if(!self.title)     self->_title = self.url.path.lastpathcomponent.stringbydeletingpathextension;  self->_artist = [tagsdictionary objectforkey:@"tpe1"]; if(!self.artist)     self->_artist = @"unknown artist";  self->_album = [tagsdictionary objectforkey:@"talb"]; if(!self.album)     self->_album = @"unknown album";  self->_genre = [tagsdictionary objectforkey:@"tcon"]; if(!self.genre)     self->_genre = @"unknown genre";  self->_year = [tagsdictionary objectforkey:@"tyer"]; if(!self.year)     self->_year = @"unknown year";  cfrelease(pidict); }

and dont know how change tag of file.

second.

so found method using taglib , found examples, guys using library , objc read files. , didnt find examples how write tags.

so want know how can write id3 tags?

sorry english.


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