Initializing Swift properties that require “self” as an argument

Question

I have a Swift class that I\'d like to look something like this:

class UpdateManager {
  let timer: NSTimer

  init() {
    timer = NSTimer(timeInterval: 600         


        

Answer 1

You've found the primary use case of the Implicitly Unwrapped Optional.

• You need to access self from init, before timer is initialized.
• Otherwise, timer should never be nil, so you shouldn't have to check it outside of init.

So, you should declare let timer: NSTimer!.