CustomImageLoadingView.m

@import DFImageManager;

@interface CustomImageLoadingView

- (void)prepareForReuse;
- (void)setImageWithRequest:(nonnull DFImageRequest *)request;

@end

@implementation CustomImageLoadingView {
    DFImageTask *_task;
}

- (void)dealloc {
    [self cancelFetching];
}

- (void)prepareForReuse {
    [self cancelFetching];
    self.image = nil;
}

- (void)cancelFetching {
    _task.completionHandler = nil; // Make sure that completion handler is not called for obsolete tasks
    [_task cancel];
    _task = nil;
}

- (void)setImageWithRequest:(DFImageRequest *)request {
    [self cancelFetching];
    
    // TODO: Add activity indicator
    typeof(self) __weak weakSelf = self;
    _task = [DFImageManager imageTaskForRequest:request completion:^(UIImage *__nullable image, NSError *__nullable error, DFImageResponse *__nullable response, DFImageTask *__nonnull imageTask){
        // TODO: Remove activity indicator
        weakSelf.image = image;
        if (!response.isFastResponse) { // Not from cache
            // TODO: Add animations if necessary
        }
    }];
    [_task resume];
}

@end