How to create Non-optional stored properties for UIViewController Custom Subclass

Question

When subclassing UIViewController ( and other similar classes ) we do not have to deal with any initialization, so if I create a stored property that is not an optional, Xcode will complain that there are no initializer.

So how can I create a non-optional store property in these classes? or should I?

Answer 1

You have 2 options:

• initialize it inline

  var myProp = MyClass()
  

• declare it as implicitly unwrapped optional:

  var myProp: MyClass!
  

  and initialize it anywhere in the view controller - usually in viewDidLoad. This is the pattern commonly used for outlets, and one of the few cases where I tolerate implicitly unwrapped