Is it the right way using `[weak self]` in swift closure?

Question

I always using [weak self] in swift closure to prevent reference cycle. Here is the code below, is it the correct way?

someTask(completion: {[w         


        

Answer 1

You can use it like this from Swift 4.2

someTask(completion: {[weak self] (result) in
    guard let self = self { return }

    //it safe when reach here always

    self.xxx = yyy
    self.doLongTermWork()
    self.finish()
})