NSMetadataQuery by folders iOS

Question

I am performing a NSMetadataQuery and I am getting all the URL for both Files and Directories.

func initSearchQuery(){
    print("\(logClassName): initSearchQuery")

    searchQuery.searchScopes = [NSMetadataQueryUbiquitousDocumentsScope]

    let searchPredicate = NSPredicate.init(format: "%K like '*'", argumentArray: [NSMetadataItemFSNameKey])
    searchQuery.predicate = searchPredicate

    NotificationCenter.default.addObserver(self, selector: #selector(updateDataWithNotification), name: NSNotification.Name.NSMetadataQueryDidFinishGathering, object: searchQuery)

    NotificationCenter.default.addObserver(self, selector: #selector(updateDataWithNotification), name: NSNotification.Name.NSMetadataQueryDidUpdate, object: searchQuery)

    searchQuery.enableUpdates()
    searchQuery.start()

}

Is there a way to do a predicate which would give only the URL's for the directory?

Answer 1

After some research I have finally resolved my problem.

Let's assume that we have the path for the iCloud folder

var iCloudUrl = fileManager.url(forUbiquityContainerIdentifier: nil)
iCloudUrl = iCloudUrl.appendingPathComponent("Documents")

And now we want to perform a NSMetadataQuery for folder1 inside the iCloud Documents folder.

We could access the content by declaring a NSPredicate like that:

let searchPredicate = NSPredicate.init(format: "%K BEGINSWITH %@", argumentArray: [NSMetadataItemPathKey,iCloudUrl.appendingPathComponent("Folder1").path])

It will return all the URL's for the folder, files and Subfolders.

1) If we just want to get the the files then the NSPredicate will look like that

let searchPredicate = NSPredicate.init(format: "%K BEGINSWITH %@ && NOT %K.pathExtension = ''", argumentArray: [NSMetadataItemPathKey,iCloudUrl.appendingPathComponent("Folder1").path,NSMetadataItemFSNameKey])

2) If we want to count how many folders and subfolder it has then

let searchPredicate = NSPredicate.init(format: "%K BEGINSWITH %@ && %K.pathExtension = ''", argumentArray: [NSMetadataItemPathKey,iCloudUrl.appendingPathComponent("Folder1").path,NSMetadataItemFSNameKey])