PMODownloader.m - With delegate

PMODownloader.m

#import "PMODownloader.h"
#import "PMODownloadNotifications.h"

@implementation PMODownloader

//1
@synthesize receiver = _receiver;

//2
#pragma mark - Public API / Protocol implementation
- (void)downloadDataFromURL:(NSURL *)url {
    
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    NSURLSession *session = [NSURLSession sharedSession];
    
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                            completionHandler:
                                  ^(NSData *data, NSURLResponse *response, NSError *error) {
                                      if (error) {
                                          [self notifyObserverDownloadFailure];
                                      } else {

                                          [self.receiver didDownloadedData:data];
                                      }
                                  }];
    [task resume];
    
}


#pragma mark - Notifications
- (void)notifyObserverDownloadFailure {
    
    [[NSNotificationCenter defaultCenter] postNotificationName:PMODownloadFailed
                                                        object:self
                                                      userInfo:nil];
}


@end