Question

In xcode 4 I am unable to lock the screen orientation to only portrait even though I have portrait selected only. How to I do this programmatically?

   - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

this code works in a new blank project

Answer 1

For each view controller (or just the parent), implement -shouldAutorotateToInterfaceOrientation: Set the default orientation to portrait and then do:

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return NO;
}

Alternately, you can do:

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return interfaceOrientation == UIInterfaceOrientationPortrait;
}

which will allow a rotation to portrait but not away from it.