核心数据，将图像存储在字典中

Question

I have an app that feature "pages". Each page can have n number of images, depending on user preference. To store the images and associate the image with the correct view etc, I am building a dictionary for each image, then storing that dictionary in an array of image dictionaries, which I save to core data as binary data. I am storing the image itself as an object in the dictionary, like below. Is this an efficient and safe way to do this? Seems to work ok...

imageDictionay = [NSMutableDictionary dictionaryWithObjectsAndKeys:image, @"image", imageTag, @"tag", imageTransformString, @"transform", nil];

Answer 1

That way will certainly work, but I would personally create another entity for ImageInfo like so:

If you are going to have a dictionary with the same three keys, it makes more sense to me to have an entity with those three attributes.

Also, if you are really worried about performance, you could also write the image to disk and just put a string in Core Data to tell you where the image is stored.