revisedDownload

NSURLSessionDownloadTask *getImageTask = [session downloadTaskWithURL:[NSURL URLWithString:imageUrl]
                                                    completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
                                                        // Here you use the location variable provided in the completion handler to get a pointer to the image
                                                        UIImage *downloadedImage = [UIImage imageWithData:[NSData dataWithContentsOfURL:location]];
                                                        // Finally you could, for example, update UIImageView’s image to show the new file.
                                                        dispatch_async(dispatch_get_main_queue(), ^{scheduleImage.image = downloadedImage;});

                                                        // This is me trying to add stuff... downloading the image to a file
                                                        NSString *imageName = [@"http://upload.wikimedia.org/wikipedia/commons/4/47/PNG_transparency_demonstration_1.png" lastPathComponent];


                                                        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                                                        NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;

                                                        UIImage *imageToSave = [UIImage imageWithData:[NSData dataWithContentsOfURL:location]];
                                                        NSData *binaryImageData = UIImagePNGRepresentation(imageToSave);

                                                        [binaryImageData writeToFile:[basePath stringByAppendingPathComponent:imageName] atomically:YES];

                                                    }];
// You always have to start up the task!
[getImageTask resume];
}