Learn how to use an important construct in Swift called closures, which you often use to provide a block of code that is executed some time in the future.
isn’t a “weak self” required here?
The reason you sometimes need to use weak self is to avoid retain cycles, where an object (like a view controller) holds an object that has a reference back to the object (like using self within a closure).
In this case, we don’t store the alert object in a property on the view controller so don’t need it. For more details, see this: ios - Should self be captured as strong in a UIAlertAction's handler? - Stack Overflow
actually only in the Instruments course with Luke did i understand about the retain cycle concept, clearly.
thanks!
Cool! Glad to hear that Luke’s explanation helped.
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