Example of downloading a file and saving it in a directory in Documents

In the .h file

@interface AppMain : NSObject
                        //-ADD THIS DELEGATE
{
        FileDownloader *fileDownloader1;        //-ADD THIS

In the .m file

//********** DOWNLOAD FILE **********
- (void) SomeMethodName
{
        NSLog(@"STARTING DOWNLOAD");

        if (!fileDownloader1)
                fileDownloader1 = [[FileDownloader alloc] init];

        [fileDownloader1 setDelegate:self];

        [fileDownloader1 DownloadFile:@"http://www.somedomain.com/somefile.html"];
}

//********** FILE DOWNLOAD FINISHED CALLBACK **********
- (void)FileDownloadFinished:(NSData *)file
{
        NSString *filePath;
        NSError *error;

        NSString *path;
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"OurFiles"];

        //Create a new cache directory
        if (![[NSFileManager defaultManager] createDirectoryAtPath:path
                                                                   withIntermediateDirectories:NO
                                                                                                        attributes:nil
                                                                                                                         error:&error])
        {
                NSLog(@"Create directory error: %@", error);
        }

        //Save the file
        filePath = [path stringByAppendingPathComponent:@"somefile.html"];

        [[NSFileManager defaultManager] createFileAtPath:filePath
                                                                contents:file
                                                                attributes:nil];
}