It is not working. Xcode says "the app has been killed by the operating system because it is using too much memory" I tried to debug the code the same as your code(count 1,000,000) I think it is not available anymore. (The article is written 7 years ago)

I couldn't solve the problem. What I can do is only just waiting not happening anymore..😕

I couldn't solve the problem. What I can do is only just waiting not happening anymore..😕

I couldn't solve the problem. What I can do is only just waiting not happening anymore..😕