“Cannot assign to” error iterating through array of struct

Question

I have an array of structs:

struct CalendarDate {
    var date: NSDate?
    var selected = false
}

private var collectionData = [CalendarDate]()
         


        

Answer 1

If you are using structs they are copies in the array. So even changing them only changes the copy, not an actual object in the array.

You have to make them a variable in the loop to be editable copy, and reassign them into the array right back.

If they are classes and not structs, than you don't have to reassign part, just do the var thing.

for (index, var c) in collectionData.enumerated() {
        c.selected = false
        collectionData[index] = c
    }