How to disable specific orientation in iOS - ios

Question

I want to disable landscape orientation in some view.
I have overridden the following two methods but these method is not going to call at any time.
- (NSUInteger) supportedInterfaceOrientations {
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation) preferredInterfaceOrientationForPresentation {
return UIInterfaceOrientationPortrait;
}
Am I missing something?
Please help me.

Answer 1

Create subclass of UINavigationController and override these methods as per below:
- (NSUInteger)supportedInterfaceOrientations
{
if([self.topViewController respondsToSelector:#selector(supportedInterfaceOrientationsForThisContorller)])
{
return(NSInteger)[self.topViewController performSelector:#selector(supportedInterfaceOrientationsForThisContorller) withObject:nil];
}
return UIInterfaceOrientationPortrait | UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
}
- (BOOL)shouldAutorotate
{
if([self.visibleViewController respondsToSelector:#selector(shouldAutorotateNow)])
{
BOOL autoRotate = (BOOL)[self.visibleViewController
performSelector:#selector(shouldAutorotateNow)
withObject:nil];
return autoRotate;
}
return YES;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return UIInterfaceOrientationPortrait;
}
and use below method in your UIViewController class where you want to set only portrait orientation
- (NSUInteger) supportedInterfaceOrientationsForThisContorller {
// Return a bitmask of supported orientations. If you need more,
// use bitwise or (see the commented return).
return UIInterfaceOrientationMaskPortrait;
// return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
}
-(BOOL)shouldAutorotateNow
{
return YES;
}

Answer 2

Check out this answer. The guy has probably explained the delegates in much detail.
Also try,
- (void)awakeFromNib
{
isShowingLandscapeView = NO;
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(orientationChanged:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
}
- (void)orientationChanged:(NSNotification *)notification
{
UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
!isShowingLandscapeView)
{
[self performSegueWithIdentifier:#"DisplayAlternateView" sender:self];
isShowingLandscapeView = YES;
}
else if (UIDeviceOrientationIsPortrait(deviceOrientation) &&
isShowingLandscapeView)
{
[self dismissViewControllerAnimated:YES completion:nil];
isShowingLandscapeView = NO;
}
}

Answer 3

Did you used below method in your code, with out this supportedInterfaceOrientations will not get called
-(BOOL) shouldAutorotate
{
return YES;
}