How can I detect device orientation going back and forth through tabs and views?

My application goes back and forth between Portrait and Landscape. I have all of my content(labels, uiimageviews, uilabels) lined up to relocate for both orientations. However, the only change when the device is actually rotated. When I cycle between tabs after it has been rotated it just shows up autosized and not the way I have it setup when the user rotates it.

How can I detect the orientation of the device and display the view to reflect the orientation when the taps different tabs?

Ok, I set it to viewWillAppear. Is there a reason why it isn't detecting the orientation and displaying the content where I have set it?

-(void)vi开发者_高级运维ewWillAppear:(UIInterfaceOrientation)fromInterfaceOrientation duration:(NSTimeInterval)duration{

 UIInterfaceOrientation toOrientation = self.interfaceOrientation;
 [UIView beginAnimations:@"move buttons" context:nil];
 [UIView setAnimationDuration:0.5f];
 [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
 if(toOrientation == UIInterfaceOrientationPortrait
    || toOrientation == UIInterfaceOrientationPortraitUpsideDown)
 {
  aboutContent.frame = CGRectMake(20, 100, 280, 107);
  myLogo.frame = CGRectMake(-5, 20, 330, 65);
  bulletOne.frame = CGRectMake(40, 220, 240, 45);
  bulletTwo.frame = CGRectMake(40, 270, 240, 45);
 }
 else
 {
  aboutContent.frame = CGRectMake(40, 80, 400, 70);
  myLogo.frame = CGRectMake(230, 30, 20, 20);
  bulletOne.frame = CGRectMake(90, 140, 330, 65);
  bulletTwo.frame = CGRectMake(90, 170, 330, 65);
 } 
 [UIView commitAnimations];
}

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In each UIViewController's viewWillAppear check the device's orientation and if the orientation is different from how you have it layed out then send willRotateToInterfaceOrientation:duration: to self. That's assuming that your willRotateToInterfaceOrientation:duration: will update the layout to the specified orientation.