Preventing auto rotation on every view controller of my application IOS 6

Preventing auto rotation on every view controller of my application IOS 6

How do I go about disabling auto rotation on every view controller of my
application? I want each view/screen to only be viewed in portrait mode, I
do not want my view controllers to transition to landscape mode if the
phone is rotated. How can I go about doing this? I have seen too many
confusing explanations/tutorials on the web. I have tried the following
code on a particular view controller and it did not help, the view still
rotated
- (NSInteger)supportedInterfaceOrientations
{
return UIInterfaceOrientationMaskPortrait;
}
- (BOOL) shouldAutorotate {
return YES;
}