iOS 8 Orientation Change Detection

Question

Running on iOS 8, I need to change the UI when rotating my app.

Currently I am using this code:

-(BOOL)shouldAutorotate
{
    UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
    if (orientation != UIInterfaceOrientationUnknown) [self resetTabBar];

    return YES;
}

What I do it remove the current UI and add a new UI appropriate to the orientation. However, my issue is that this method is called about 4 times every time a single rotation is made.

What is the correct way to make changes upon orientation change in iOS 8?

Answer 1

Timur Kuchkarov is correct, but I'll post the answer since I missed his comment the first time I checked this page.

The iOS 8 method of detecting orientation change (rotation) is implementing the following method of the view controller:

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
    // Do view manipulation here.
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
}

Note: The controller's view has not yet transitioned to that size at this time, so be careful if your sizing code relies on the view's current dimensions.