How to detect the device orientation changed event on iPad iOS 9+ when the lock is set outside?

Question

on iPad ios 9+, with objective-c : - lock the orientation outside of your app - in code: how to detect when the device changes the orientation?

I have tried all possibilities:

1) try to catch UIDeviceOrientationDidChangeNotification event:

- (void)subscribeOrientationChangeEvent {

    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(orientationChanged:)
                                                 name:UIDeviceOrientationDidChangeNotification
                                               object:[UIDevice currentDevice]];
}

- (void) orientationChanged:(NSNotification *)note {

     NSLog("Device rotated");
}

2) override viewWillTransitionToSize method

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id)coordinator
{
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    NSLog("Device rotated");
}

3) use KVO to see if the value orientation of [UIDevice currentDevie]

4) use KVO to see if the value statusBarOrientation of [UIApplication sharedApplication]

5) set Require FullScreen for the setting StatusBarStyle

reference: link

apply this setting and combine with all above attempts, but all failed.

6) using Accelerometer (CMMotionManager)

Any advice? thanks a lot

Try with detecting when the device return from locked state, then check for new orientation. — Duyen-Hoa

Robert J. Clegg Robert J. Clegg · Accepted Answer · 2017-02-21T17:06:08

If the device orientation is lock; your app will have to abide by it. You won't be able to detect orientation for obvious reasons. So the short answer is you can't.

How to detect the device orientation changed event on iPad iOS 9+ when the lock is set outside?

6) using Accelerometer (CMMotionManager)

1 Answers