Eu estou trabalhando com imagens assíncronas de download. Eu recebo muitas imagens do meu servidor, mas todas são temporárias e não vou armazenar em cache nenhuma delas. Mas o aplicativo aparentemente salva as imagens de download em / Library / Caches. Como posso resolver isso?

Existe alguma maneira de evitar imagens baixadas em cache? Ou excluí-los do cache?

Eu tentei esses dois métodos diferentes:

#pragma mark - Method 1

- (void)method1{
    NSURL *imageURL = [NSURL URLWithString:self.photoLink];
    [self setImage:[UIImage imageNamed:@"nut"] forState:UIControlStateNormal];
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
        dispatch_async(queue, ^{
        NSData *data = [NSData dataWithContentsOfURL:imageURL options:NSDataReadingUncached error:NULL];
        dispatch_async(dispatch_get_main_queue(), ^{
            [self setImage:[UIImage imageWithData:data] forState:UIControlStateNormal];
            });
        });
    //}
}

#pragma mark - Method 2

- (void)method2{

    NSOperationQueue *queue = [[NSOperationQueue alloc]init];

    // The Placeholder
    [self setImage:[UIImage imageNamed:@"nut"] forState:UIControlStateNormal];

    NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithTarget:self
                                                                            selector:@selector(loadDataAsyc)
                                                                              object:nil];
    [queue addOperation:operation];

    [operation release];
}
-(void)loadDataAsyc{

    // create a local autorelease pool since this code runs not on main thread
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:self.photoLink] options:NSDataReadingUncached error:NULL];
    UIImage *image = [UIImage imageWithData:data];

    [self performSelectorOnMainThread:@selector(showImage:) withObject:image waitUntilDone:NO];

    [pool release];
}
-(void)showImage:(UIImage *)image{
    [self setImage:image forState:UIControlStateNormal];
}