Asynchronously Downloading MP3s

i having issues getting accomplished correctly. have table view controller parses xml of podcast loaded mp3s. on did select row, have:

code:

- (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {  rssentry *entry = [_allentries objectatindex:indexpath.row];      nsurl *url = [nsurl urlwithstring:entry.articleurl];              nslog(@"%@", url);  nsurlrequest *therequest = [nsurlrequest requestwithurl:url cachepolicy:nsurlrequestreloadignoringlocalcachedata timeoutinterval:60];  receiveddata = [[nsmutabledata alloc] initwithlength:0];  nsurlconnection *connection = [[nsurlconnection alloc] initwithrequest:therequest delegate:self startimmediately:yes];  }

the warning connection unused, trying set same way apple documentation has it. have following methods implemented:

code:

- (void) connection:(nsurlconnection *)connection didreceiveresponse:(nsurlresponse *)response {      [uiapplication sharedapplication].networkactivityindicatorvisible = yes;      [receiveddata setlength:0];  }    - (void) connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data {      [receiveddata appenddata:data];  }    - (void) connection:(nsurlconnection *)connection didfailwitherror:(nserror *)error {      [uiapplication sharedapplication].networkactivityindicatorvisible = no;      [connection release];  }    - (nscachedurlresponse *) connection:(nsurlconnection *)connection willcacheresponse:(nscachedurlresponse *)cachedresponse {      return nil;  }    - (void) connectiondidfinishloading:(nsurlconnection *)connection {      [uiapplication sharedapplication].networkactivityindicatorvisible = no;      [connection release];  }  

when click on row, nslog returns

code:

2012-03-12 12:33:42.154 smcoc[11283:17f03] http://www.smcoc.net/content/audio/sermons/2012/2012_03_11am_the_big_hunt.mp3#!111433318  

when click row, networkactivityindicator starts spinning, , goes little while , stops. have second table view saved mp3s, files nsmutablearray:

code:

- (void)viewwillappear:(bool)animated {  	nsarray *paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes);  	nsstring *documentsdirectorypath = [paths objectatindex:0];  	nsfilemanager *manager = [nsfilemanager defaultmanager];  	self.title = @"saved sermons";  	self.files = [[manager contentsofdirectoryatpath:documentsdirectorypath error:nil] retain];  	  	  	  	self.navigationitem.rightbarbuttonitem = self.editbuttonitem;  	[self.tableview reloaddata];      [super viewdidload];      [super viewwillappear:animated];  	  }  

and rows in table:

code:

- (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {      // return number of rows in section.      return [self.files count];  }      // customize appearance of table view cells.  - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {  	  	  	  	  	      static nsstring *cellidentifier = @"cell";  	      uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:cellidentifier];      if (cell == nil) {          cell = [[[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:cellidentifier] autorelease];      }  	  	cell.textlabel.text = [self.files objectatindex:indexpath.row];  	uifont *cellfont = [uifont fontwithname:@"americantypewriter-bold" size:17];          cell.textlabel.font = cellfont;     	return cell;    }

however, when go saved table view, nothing appears. doing wrong file not downloading?

 

i believe forgot 1 key piece: when data done downloading, need write device.

add:

code:

[receiveddata writetofile:localfilename atomically:yes];

to connectiondidfinishloading method.

 

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