Accessing Document directory in iOS storing and retrieving data

Question

I'm building a data which can store images into iOS document directory. I'm able to store the data in the document directory but how can I access it.And what is purpose of directory in iOS apps when there is persistent data store technologies like core data.Whether I can use directory to get persistent storage or I should go for core data.

Answer 1

Have you tried using UIDocumentPickerViewController?

This is Apple documentation: https://developer.apple.com/documentation/uikit/uidocumentpickerviewcontroller

Here is a tutorial: https://medium.com/flawless-app-stories/a-swifty-way-to-pick-documents-59cad1988a8a

Answer 2

I think, document directory is better solution in your case. Core data is useful for maintaining records corresponding to multiple fields.

Just use NSFileManager, something like this:

[[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:&error];
It will give you an array with all the file paths for all files in the given path.

This is how you load the images from the array of URLs.

NSArray *paths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:&error];
for (NSURL *url in paths)
{
    UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];
}