Cuando se presiona un botón determinado en mi aplicación, la vista debe cambiar la orientación de vertical a horizontal. Cuando el usuario regresa, el controlador de vista debe volver a cambiar a vertical. Pero a veces la orientación no cambia o se usa el marco de vista incorrecto.

Aqui esta mi codigo

-(void)btnSignClicked:(CustomSignButton *)btn {
    isSignButtonClicked = true;
    if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_0) {
        NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeRight];
        [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
    }
    else
    {
        [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:YES];
    }
    selectedWaiverId = btn.customTag;

    SignatureView *obj = [[SignatureView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) delegate:self]; // Most of time got size (568,320) but some time i got (320,568), Don't know why
    [self.view addSubview:obj];
}

#pragma mark - SIGNATUREVIEW DELEGATE
-(void)removeSignatureView:(SignatureView *)signatureView {
    isSignButtonClicked = false;

    if (NSFoundationVersionNumber > NSFoundationVersionNumber_iOS_7_0)
    {
        NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
        [[UIDevice currentDevice] setValue:value forKey:@"orientation"]; // Some time not changed the orientation are view remaining in landscape 
    }
    else
    {
        [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:YES];
    }

    [signatureView removeFromSuperview];
    signatureView = nil;

}
#pragma mark
#pragma mark - Rotate screen
-(UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    if (isSignButtonClicked == true)
    {
        return UIInterfaceOrientationMaskLandscapeRight|UIInterfaceOrientationMaskLandscape;
    }
    else
    {
        return UIInterfaceOrientationMaskPortrait;
    }
}
- (BOOL)shouldAutorotate
{
    return YES;
}
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if (isSignButtonClicked == true)
    {
        return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
    }
    else
    {
        return (interfaceOrientation == UIInterfaceOrientationPortrait);
    }

}

ACTUALIZAR

A vecesviewWillTransitionToSize no se llama al método, así que también integro esta notificación

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceOrientationDidChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

Pero a veces esto tampoco funciona.