How to save an entire array of Integers?

Question

I need to save all of the data in an array of Integers. I am in Swift Playgrounds, I tried using UserDefaults to save them this to store in

let savedSugarArray = [UserDefaults.standard.integer(forKey: "sugarArray")]

This to place the data in savedSugarArray

UserDefaults.standard.setValue(sugarArray, forKey: "sugarArray")

Since I'm using Swift Playgrounds I think I'd rather not use core Data since it is so lengthy. Is there another way to do this? Thank you in advance.

Answer 1

UserDefaults doesn't function the same in playground (Xcode 8.2.1) as it does in a project. Normally, you'd use the following:

Set:

let integerArray: [Int] = [1,2,3,4,5]
UserDefaults.standard.set(integerArray, forKey: "sugarArray")

Get:

if let integerArray = UserDefaults.standard.object(forKey: "sugarArray") as? [Int]{
      //good to go
}
else{
     //no object for key "sugarArray" or object couldn't be converted to [Int]
}

However, to show that UserDefaults don't function the same in playground, simply copy this into your playground:

let integerArray: [Int] = [1,2,3,4,5]
UserDefaults.standard.set(integerArray, forKey: "sugarArray")
if let integerArray = UserDefaults.standard.object(forKey: "sugarArray") as? [Int]{
    print("UserDefaults work in playground")
}
else{
    print("UserDefaults do not work in playground")
}