iPhone wont autorotate to upsidedown

Question

I have

<key>UISupportedInterfaceOrientations</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
</array>

in info.plist and did a search and set every instance of shouldAutorotateToInterfaceOrientation to return YES. But on iPhone it behaves as if upsidedown is not supported. UpsideUp portrait works, landscapes work, updsidedown shows landscape. Why?

iPad works fine in all orientations. And they share .xibs

---

UPDATE

I have since added

- (BOOL)shouldAutorotate {
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAll;    
}

after every existing instance of shouldAutorotateToInterfaceOrientation and still no love.

I am targeting iOS 4.3 but my simulator and physical device run iOS 6

Answer 1

Need some more context based on what you've tried already? Are you using a NIB-based setup with a navigation controller, tab bar controller or something like that? If so, you need to add a category to support it because you can't override the implementation of those classes in NIBs (or in general)

https://stackoverflow.com/a/12758715/490180

Talks about iPhone 5, but the issue is really iOS6 related.