how to identify the orientation of viewController's subclass in ipad - objective-c

Question

I have one viewController class example FirstView and it has one subclass ex. secondView.
SecondView is a subclass of FirstView.Now I want to check the orientation in second view?
How to identify the secondView orientation?I checked the following method but its not working.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
When I change the orientation no method is called.
Is there any way to identify the orientation of the custom subclass?
How can I solve this issue?

Answer 1

[[UIApplication sharedApplication] statusBarOrientation] returns you the current device orientation.

Answer 2

I think you can use UIAccelerometer. You just need to implement the UIAccelerometerDelegate.
Just to get the current orientation of the view using Accelerometer you can use this code:
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
// Get the current device angle
float x = [acceleration x];
float y = [acceleration y];
float angle = atan2(y, x);
if([acceleration z]>-0.84)
{
if(angle >= -2.25 && angle <= -1) // Current Orientation = Portrait
{
//Do the work
}
else if(angle >= -0.35 && angle < 0.20) //Current Orientation = Landscape Left
{
//Do the work
}
else if(angle >= 0.90 && angle <= 2.00) //Current Orientation = Portrait Upside Down
{
//Do the work
}
else if(angle <= -2.70 || angle >= 2.5) //Current Orientation = Landscape Right
{
//Do the work
}
}
}
Let me know if you need more help on this.
Hope this helps.

Answer 3

In you super class you should call the orientation method of its super like:
Class A {
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
[super shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}
}
class b inherits class a {
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
NSLog(#"Your stufs");
}
}