UIViewController isEditing - Property observer doesn't work

Question

I was trying to implement property observers on my custom UIViewController but I noticed it was not working with the isEditing property.

Do you guys have an idea why?

class MasterViewController: UIViewController {

    // MARK: - Properties

    override var isEditing: Bool {
        didSet {
            print("VC is editing")
        }
    }
}

score 8 · Answer 1 · answered Apr 12 '18 at 16:21

According to the documentation for isEditing

Use the setEditing(_:animated:) method as an action method to animate the transition of this state if the view is already displayed.

And from setEditing(_:animated:)

Subclasses that use an edit-done button must override this method to change their view to an editable state if isEditing is true and a non-editable state if it is false. This method should invoke super’s implementation before updating its view.

TL;DR

You'll want to override setEditing(_:animated:) instead.

Good grief. This applies to other interfaces, too. – funct7 Jan 13 '19 at 12:30 — funct7, Jan 13 '19 at 12:30

score 0 · Answer 2 · answered Apr 01 '22 at 19:07

0

It's for those who can't find any example how setEditing works.

SWIFT 5 :

override func setEditing(_ editing: Bool, animated: Bool) {
        if yourTableView.isEditing == true {
            yourTableView.isEditing = false //change back
            
            
        } else {
            yourTableView.isEditing = true // activate editing
            editButtonItem.isSelected = true // select edit button
        }
    }

answered Apr 01 '22 at 19:07

chAOS

11
5

Don't hesitate if anybody knows how use "animated" part properly. – chAOS Apr 01 '22 at 19:16
Why are you not using the function parameter `editing` in your code? – Joakim Danielson Apr 06 '22 at 08:17
Joakim Danielson it's all about I found in apple documents. if you have more examples how can expand code - please share it here... – chAOS Apr 06 '22 at 14:33
No, I am asking you. – Joakim Danielson Apr 06 '22 at 15:56
Oh, I got it) Just editing is not working in Xcode 13, I had pop up error about it. – chAOS Apr 07 '22 at 13:19

UIViewController isEditing - Property observer doesn't work

2 Answers2

SWIFT 5 :