Question

I use…

-(void)didRotateFromInterfaceOrientation:

… to adapt a view that has been rotated to landscape.

However, I don’t know which method to use when the view needs to be rotated back to portrait.

Answer 1

You can use the same method but include a test to see what the orientation change was.

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
    switch fromInterfaceOrientation {
        case UIInterfaceOrientationPortrait {
            //... handle roation from portrait
            break;
        }
        case  UIInterfaceOrientationLandscapeLeft {
            //... handle roation LandscapeLeft
            break;
        }
        //.. and so on
    }
}

However, configuring a view for its new orientation should be done in one of the rotation methods that begin with “will”. The above method tells the view controller what the previous orientation was. It doesn’t send what the current orientation is or will be. The “will” methods allow you adapt the view before the new orientation completes.