Strange behaviour in iPad device has been inclined horizontally

Question

when i incline horizontally an iPad device i obtain a strange behaviour. The notification:

 NSNotificationCenter.defaultCenter().addObserver(self, selector: "MySelector", name: UIDeviceOrientationDidChangeNotification, object: nil)

has been triggered and invoke "MySelector" causing unuseful ui update. There is a way to avoid the triggering of my selector when my device has been horizontally inclined?

score 0 · Answer 1 · edited May 23 '17 at 10:29

0

What I see from the following previously asked question: Link -- is that if you do not want such a notification to appear, then you will want to override the viewDidDisappear method and call removeObserver(). I am not sure if this is the answer you are looking for, since I had some trouble understanding your original question. Let me know if this is what you wanted to know.

edited May 23 '17 at 10:29

Community

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answered Oct 16 '15 at 16:15

Michael Fourre

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Doing that will disable orientation flipping all together, I believe the poster is saying if he has a device laying flat on a surface facing horizontal, and he lifts the screen up and it is still horizontal, it is still calling the orientationdidchange notification. – Knight0fDragon Oct 16 '15 at 17:40
Hmm, okay, I didn't think about that being what the OP meant by the question. – Michael Fourre Oct 16 '15 at 18:06

score 0 · Answer 2 · answered Oct 19 '15 at 12:27

Try wrapping the call function in an if condition to ensure that the orientation changed. This is pseudo code:

func MySelector
{
  if oldorientation != neworientation
  {
      do stuff
  }
}

If this code is still firing, then that means that the system is going to portrait then horizontal real quick, and you may have to put in a small timer or something to double check the orientation.

Strange behaviour in iPad device has been inclined horizontally

2 Answers2