-[UIApplication delegate] must be called from main thread only

Question

This warning leads to a serious problem cause I really can\'t call the delegate outside of the main thread using Xcode 9 beta 2. Strange thing is that this was working when

Answer 1

In Swift, you could also use DispatchQueue.main.async to call the UI controlling method from the main thread

DispatchQueue.main.async {
    YourUIControlMethod()
}