viewDidEnd() method possible in swift?

Question

I have a UIBarButtonItem that performs a segue, but I need to invalidate an NSTimer when this button is pressed and the segue is performed. Unfortunately, it doesn't seem you can create a touch up inside method with a UIBarButtonItem. This being said, how could I invalidate this timer when this view is exited or this button is tapped? Possibly some viewDidEnd() method? Please bear with me, I am new to swift and coding.

Answer 1

A good time to invalidate timers is probably going to be in viewWillDisappear(). You can override it like so in your view controller:

override func viewWillDisappear(animated: Bool) {
   // Your code here
}