Hiding button if swift Coredata function is blank - swift

Question

I have a problem with some code. I have a function called attachments. It calls on a DatabaseManager to a specific function getttachmentdata. This calls on coredata to see if a user has uploaded an image and call on it. If it has it I have another part of the code where the user clicks on a button and it shows that image.
The problem is that when the data is blank or there is nothing uploaded I wanted the button to be disabled. This might be a simple fix but I am not quite sure actually.
let attachments = DataBaseManager().getAttachmentData()
if attachments.isEmpty {
btnProofOfDelivery.isHidden = true
btnProofOfDelivery.isEnabled = false
}
I wrote the code above, however, when I tried running my program it still displayed the button that I wanted to disappear. Running without the if statement makes the button disappear.
code for getattachments
func getAttachmentData()-> Array<Data>{
var data1 = [Data]()
let context = CoreData.sharedCoreData.managedObjectContext
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Attachments")
do {
let result = try context.fetch(request)
print(result)
for data in result as! [NSManagedObject] {
print(data.value(forKey: "attachment") as! Data)
data1.append(data.value(forKey: "attachment") as! Data)
}
if data1.count == 0 {
return [Data()]
}else{
return data1
}
} catch {
return [Data()]
}
}

Answer 1

Below is your bug, if the fetch doesn't return anything you return a new Data object
if data1.count == 0 {
return [Data()]
}
You of course meant to write
if data1.count == 0 {
return [Data]()
}
and some issue in catch
or you can just remove all of that since data1 is properly initialised so you can just return it either way so the code after the for {} loop can then be reduced to
return data1
} catch {
print(error)
}
}