iPad - UISplitViewController - Background color

I have a UISplitViewController setup, but for some reason the background isn't taking hold until you've rotated it once.

I use IB to setup the split view and set the detail view to be IPadDetailViewController. Inside that I have the following:

- (void)loadView {
    [super loadView];

    self.view.backgroundColor = [UIColor greenColor];

    toolbar = [[UIToolbar alloc] initWithFrame:CGRectZero];
    toolbar.barStyle = UIBarStyleDefault;
    [toolbar siz开发者_如何学GoeToFit];
    [self.view addSubview:toolbar];

}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    self.view.backgroundColor = [UIColor orangeColor];
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    if (self.interfaceOrientation == UIInterfaceOrientationLandscapeLeft ||
        self.interfaceOrientation == UIInterfaceOrientationLandscapeRight) {
        NSLog(@"it is in landscape!");
        self.view.backgroundColor = [UIColor grayColor]];       
    }
    else {
        NSLog(@"it is in portrait!");
        self.view.backgroundColor = [UIColor blueColor];

    }   
}

Though the code gets run and my toolbar gets place at the top, the view remains black (it starts in landscape for the Simulator).

Any ideas why?

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try setting the background color in awakeFromNib method in your iPadDetailViewController