Button text not staying changed when editing table - swift

Question

I have a tableview controller with dynamic cells. One of the cells has a button to toggle editing the table, so that the user is less likely to delete something and has to actively enable editing.
When they press the button it is supposed to toggle editing the table and the text of the button. Editing the table works, but the text for the button just flashes then goes back to the original text.
#IBAction func deleteTouched(sender: UIButton) {
editing = !editing
let indexPath = NSIndexPath(forRow: 1, inSection: 0)
let cell = tableView.cellForRowAtIndexPath(indexPath) as! FieldInfoCell
cell.deleteButton.titleLabel?.text = editing ? "Done" : "Delete Estimates"
}
I first tried referencing the sender instead of the button in the cell
#IBAction func deleteTouched(sender: UIButton) {
editing = !editing
sender.titleLabel?.text = editing ? "Done" : "Delete Estimates"
}
Why does the text flash to Done and then back to Delete Estimates when I enable editing?

Answer 1

Instead of setting text button's title label use setTitle method like
button.setTitle("<#your title#>", forState: .Normal)
Because button needs title, titleColor, image, backgroundImage, attributedTitle etc for each state(.Normal,.Selected,.Highlighted etc). Each time button changes its state these properties get refreshed based on the state - even if you set titleLabel.text or imageView?.image. You can set font,layer properties for titleLabel and imageView