DispatchQueue.main.asyncAfter is inaccurate

Question

I am trying to call a function after a delay. On iOS10 I am able to use Timer.scheduledTimer which does indeed call my closure after the given delay. However, on iOS9 I am u

Answer 1

asyncAfter is only guaranteed to wait at least as long as specified.

You probably should still be using Timer if you want exact time intervals on iOS9.

Timer.scheduledTimer(timeInterval: delay, 
               target: self, 
             selector: #selector(executeClosure), 
             userInfo: nil, 
              repeats: false)

With executeClosure being a function that executes the last saved closure.