downloaded content using NSURLConnection does not display on my iPhone? - ios

Question

i am using NSURLConnection to download mp3 files from server, my code is
- (IBAction)download:(id)sender
{
NSURL *url = [NSURL URLWithString:#"http://viadj.viastreaming.net/start/psalmsmedia/ondemand/Nin%20snehamethrayo.mp3"];
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];
}
- (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;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [[paths objectAtIndex:0]stringByAppendingPathComponent:#"myFile.mp3"];
[receivedData writeToFile:documentsDirectoryPath atomically:YES];
[connection release];
}
when i click download button, the activity indicator start animating and stops after some time (i think it is downloading). but after that i can't find the downloaded file on my iPhone disk. actually where those files stored after downloading.
i have edited my info.plist to support iTunes file sharing.
is their any mistake with this code? or why can't i see the downloaded files?

Answer 1

My Created one class for downloading ringtones, See first RingtoneDwonloader.h file
import
#protocol RingtoneDownloaderDelegate
-(void)downloadingCompleted;
#end
#interface RingtoneDownloader : NSObject
{
NSMutableData *receivedData;
NSDate *connectionTime;
NSMutableString *diskPath;
id<RingtoneDownloaderDelegate>delegate;
}
#property(nonatomic, retain) iddelegate;
-(void)createUrlRequestForDownloadRingtone:(NSString *)urlString;
-(void)cancelDownloading;
#end
Now my RingtoneDownloader.m file,
import "RingtoneDownloader.h"
import "AppDelegate.h"
#interface RingtoneDownloader(){
AppDelegate *_appDelegate;
NSURLConnection *theConnection;
}
#end
#implementation RingtoneDownloader
#synthesize delegate;
-(void)createUrlRequestForDownloadRingtone:(NSString *)urlString{
_appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:urlString] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
// create the connection with the request
// and start loading the data
theConnection =[[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if (theConnection) {
// Create the NSMutableData to hold the received data.
receivedData = [[NSMutableData data] retain];
} else {
// Inform the user that the connection failed.
}
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// This method is called when the server has determined that it
[receivedData setLength:0];
// long responseLength = [response expectedContentLength];
// NSLog(#"%ld", responseLength);
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// Append the new data to receivedData.
[receivedData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
// release the connection, and the data object
[theConnection release];
// receivedData is declared as a method instance elsewhere
[receivedData release];
UIAlertView *alt = [[UIAlertView alloc] initWithTitle:#"" message:[NSString stringWithFormat:#"%#", [error localizedDescription]] delegate:nil cancelButtonTitle:#"Ok" otherButtonTitles:nil, nil];
[alt show];
[alt release];
// inform the user
NSLog(#"Connection failed! Error - %# %#", [error localizedDescription], [[error userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"Succeeded! Received %d bytes of data",[receivedData length]);
// release the connection, and the data object
_appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSString *soundFileName = _appDelegate.ringtoneURL;
NSString *soundFileextension = [soundFileName substringFromIndex:([soundFileName length]-3)];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.%#", _appDelegate.ringtoneText, soundFileextension]];
NSData *imageData = (NSData *)receivedData;
NSError *err = nil;
BOOL isWriten = [imageData writeToFile:filePath options:NSDataWritingAtomic error:&err];
if(!isWriten){
NSLog(#"Ringtone not saved %#", [err localizedDescription]);
}
[theConnection release];
[receivedData release];
[delegate downloadingCompleted];
}
-(void)cancelDownloading{
[theConnection cancel];
[theConnection release];
[delegate downloadingCompleted];
}
Now u have to just created and instance of this class and set the delegate that i m create. That delegate give u information regarding your ringtone file is successfully downloaded or not.
Use iTunes file sharing in your app and copy the ringtone file to the app's documents directory.
Set "Application supports iTunes file sharing" to YES in your info.plist
The user can now access the ringtone via itunes and add it to their devices ringtones.