Execute a function before the orientation change

Question

When the orientation changes, is it possible to execute a function and wait for it until it finish executing and then perform the rotation? Something like that:

override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
        super.viewWillTransitionToSize(size, withTransitionCoordinator: coordinator)

         doStuff()

        // block until doStuff is done
        weak var weakSelf = self
        coordinator.animateAlongsideTransition({ (UIViewControllerTransitionCoordinatorContext) -> Void in

            }, completion: { (UIViewControllerTransitionCoordinatorContext) -> Void in  

        })
    }

I think you are looking for `willRotateToInterfaceOrientation` — Tj3n, Dec 20 '16 at 11:42
@Tj3n, `willRotateToInterfaceOrientation` is deprecated since iOS8 — dalipsia, Dec 20 '16 at 13:32

score 0 · Answer 1 · answered Dec 20 '16 at 12:07

0

Swift 3

func doStuff(check:(_ Check : Bool)->Void){

    check(true)
}

and inside viewWillTransitionToSize func :

doStuff { (myCheck) in
        if myCheck{

            // do something
        }
    }

answered Dec 20 '16 at 12:07

Rob

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is there an alternative for swift 2.3 ? – ella23 Dec 20 '16 at 12:37
@ella23 Look this answer it uses the same logic function in swift 2: http://stackoverflow.com/a/30279539/3108877 – Rob Dec 20 '16 at 13:21

Execute a function before the orientation change

1 Answers1