Cannot invoke 'indexOf' with an argument list of type '(ChecklistItem)'

Question

When I am writing code for finding an item from the array with the use of indexOf it shows me the above stated error. Here is my code:-

func addItemViewContr         


        

Answer 1

The possible reason is you didn't tell the ChecklistItem type that it is equatable, maybe you forgot to mention ChecklistItem class is inherited from NSObject.

import Foundation

class ChecklistItem: NSObject {
  var text = ""
  var checked = false

  func toggleChecked() {
    checked = !checked
  }
}

NSObject adopts or conforms to the equatable protocol