Downloading concurrent song files - ios

Question

I am Very new to iOS Application Development Platform, I am searching for one thing from Last Few weeks, actually my requirement is I have a UITableview with few Urls,and On didselectRowAtIndexPath That song should run in the Background and it downloading progress shows in another tab.
When I clicked multiple Buttons then multiple songs are downloaded simultaneously and all downloading progress should shown individually in the next Tab and here I have felicity to Pause, resume, and cancel the particular download. this is my requirement. I use AFNetworking But it is not Clear Please Help me and do the needful.
my AFNetworking code below
NSURL *url = [NSURL URLWithString:downLoadedUrlParam];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:3600];
NSString *MUSICFile=[DocumentsDirectory stringByAppendingPathComponent:songName];
self.operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:MUSICFile shouldResume:YES];
[self.operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"Successfully downloaded file to %#", MUSICFile);
//[ProcessingUrlsArray removeObject:videoString];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Error: %#", error);
if(operation.response.statusCode!= 200) {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Alert" message:#"Error While Downloaded" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alertView show];
}
}];
[httpClient enqueueHTTPRequestOperation:self.operation];
[self.operation setProgressiveDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpected, long long totalBytesReadForFile, long long totalBytesExpectedToReadForFile) {
float percentDone = totalBytesReadForFile/(float)totalBytesExpectedToReadForFile;
NSLog(#"------%#",[NSString stringWithFormat:#"CUR : %lli M",totalBytesReadForFile/1024/1024]);
NSLog(#"------%#",[NSString stringWithFormat:#"TOTAL : %lli M",totalBytesExpectedToReadForFile/1024/1024]);
NSLog(#"------%f",percentDone);
NSLog(#"------%.0f%%",percentDone*100);
self.myProgressBar.progress=percentDone;
NSLog(#"Operation%i: bytesRead: %d", 1, bytesRead);
NSLog(#"Operation%i: totalBytesRead: %lld", 1, totalBytesRead);
NSLog(#"Operation%i: totalBytesExpected: %lld", 1, totalBytesExpected);
NSLog(#"Operation%i: totalBytesReadForFile: %lld", 1, totalBytesReadForFile);
NSLog(#"Operation%i: totalBytesExpectedToReadForFile: %lld", 1, totalBytesExpectedToReadForFile);
NSLog(#"%#",downLoadedUrlParam);
self.title=downLoadNameParam;
NSMutableArray *stgPerst;
stgPerst=[[NSMutableArray alloc]initWithCapacity:0];
NSDictionary *dicInfo=[NSDictionary dictionaryWithObjects:#[[NSString stringWithFormat:#"%f",percentDone],downLoadNameParam] forKeys:#[#"heProg",#"heName"]];
NSLog(#"dict=%#",dicInfo);
[[NSNotificationCenter defaultCenter] postNotificationName:#"DOWNLOAD_PROGRESS" object:nil userInfo:dicInfo];
}];