When does bounds get updated?

I am loading a view as soon as the user rotates to landscape but when I use view.bounds in viewDidLoad it is still in portrait.

Here the code where I load the view which is triggered from a notification

- (void)orientationChanged:(NSNotification *)notification
{
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
    if (UIDeviceOrientationIsLandscape(deviceOrientation) && !isShowingLandscapeView)
    {
        [self presentModalViewController:self.graphViewController animated:YES];
        isShowingLandscapeView = YES;
    } else if (deviceOrientation == UIDeviceOrientationPortrait && isShowingLandscapeView)
    {
        [self dismissModalViewControllerAnimated:YES];
        isShowingLandscapeView = NO;
    }
}

And in the graphViewController in viewDidLoad I use self.view.bounds to initialise a core-plot.

This is how it looks like

Any hint on how to fix that?

Thanks a lot

EDIT

in viewDidLoad

// Create graph from theme
    graph = [[C开发者_开发问答PTXYGraph alloc] initWithFrame:self.view.bounds];
    CPTTheme *theme = [CPTTheme themeNamed:kCPTDarkGradientTheme];
    [graph applyTheme:theme];

    CPTGraphHostingView *hostingView = [[CPTGraphHostingView alloc] initWithFrame:self.view.bounds];
    hostingView.collapsesLayers = NO; // Setting to YES reduces GPU memory usage, but can slow drawing/scrolling
    hostingView.hostedGraph = graph;
    [self.view addSubview:hostingView];

Assuming CPTGraphHostingView will adjust the orientation of how it renders, you need to set the autoresizingMask on it. This determines how views resize when their superviews resize, which is happening in this case.

hostingView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);

It's not the correct approach. You should be doing this stuff in layoutSubviews. It will be called first time in, and subsequently each time orientation changes. Do something like this:

- (void)layoutSubviews 
{
    [super layoutSubviews];
    CGRect frame = self.bounds;

    // Do your subviews layout here based upon frame
}