Nil cannot be assigned to type ()->()?

Question

So this is a function from a class that lets you have a double tap and a single tap gesture. It\'s working fine in Swift 2.3, but after converting to Swift 3 it\'s throwing

Answer 1

Here is the way how i could overcome this. Here clang is not aware about its type. I gave a typealias and optional declaration,

typealias appDelegateBlock = ()->()

In your class, just declare it as optional,

var block: appDelegateBlock?
block = task