Question

I have a tab bar application where everything is working fine. I have rotations of the device all working fine with the various Tab Bar View controllers.

Alas it was suggested that a couple of the View Controllers needed a help page. To this end I created a new ViewController that contains a UIWebView (where help can be built into an HTML file).

I create the new “HelpViewController” as follows:

mpHelpPage     = [[HelpPageViewController alloc] init];
[mTabBarController.view addSubview: mpHelpPage.view];
[mpHelpPage retain];

mpHelpPage.view.alpha = 0.75f;

This brings up the help page no problems when I’m in portait mode. Unfortunately when I’m in landscape mode and I do the above code it adds the HelpViewController in Portrait (meaning it extends off the bottom of the screen).

As such when I alloc the ViewController above I need some way of telling the ViewController to rotate to the current device orientation.

I am, however, at a loss as to how to get it to do this. Any help would be much appreciated!

Answer 1

I handle this annoyance by putting an orientation check in viewWillAppear:, e.g.

if (self.interfaceOrientation == UIInterfaceOrientationPortrait || 
    self.interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {
    // custom code or call willRotate
} else {
    // custom code or call willRotate
}    

You can also do this if you prefer

if (UIDeviceOrientationIsPortrait(self.interfaceOrientation)) {
    // custom code or call willRotate
} else {
    // custom code or call willRotate
}