Question

I have a Tab Bar application for iPad, created using the basic Tab Bar template. I have added some custom view controllers (one for each tab, each with a corresponding NIB) and also some extra view controllers with NIBs to be used as modal views. Everything works great until I rotate the device.

My app only supports portrait orientation, so I had this in all my view controllers:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIDeviceOrientationLandscapeLeft) &&
    (interfaceOrientation != UIDeviceOrientationLandscapeRight);
}

However, the app would not rotate in the simulator or the device when turned upside down. I double and triple checked that all my view controllers had the above code.

I went through all my NIBs and checked that they all have “Rotate Subviews” ticked. I haven’t changed any of the NIB settings from the defaults anyway, apart from the basic things needed to get them showing in the tab views.

I tried changing the code in all my view controllers to this:

- (BOOL)shouldAutorotateToInterfaceOrientation(UIInterfaceOrientation)interfaceOrientation
{
    return UIInterfaceOrientationIsPortrait(interfaceOrientation);
}

It made no difference. I have made absolutely sure that the same method is being used in all the view controllers. I don’t know what else I can do. I can see no reason why it shouldn’t rotate to the upside down view.

Any help with this would be much appreciated.

Answer 1

Got it! One of my View Controllers was not hooked up to the relevant tab in IB. As I hadn’t added the images or written the code for that View Controller yet, I didn’t notice that it wasn’t associated in IB. I had done the shouldAutorotateToInterfaceOrientation method, but it seems that didn’t take effect until the connection was made in IB.

Thanks very much for suggestions on this. That’s a highly frustrating problem now dealt with!