Prevent interface from changing during rotation - iphone

Question

I want to support all orientations but portrait. I wanted to do some simple but I never was not able to find a solution.
I have 6 big buttons in my interface. Plus 2 extra small buttons.
When the orientation changes, I want to keep ALL 8 buttons in the same center/place, I just wanted to rotate the 6 big buttons, so they will be facing the right way.
I tried setting
- (BOOL)shouldAutorotate
{
return NO;
}
and sending myself a notification but I would have to deal with the old orientation vs the new orientation in order to rotate to the right position. Is there any other possibility? Plus I was never able to get the previous orientation as the notification was sent after the orientation changed (UIDeviceOrientationDidChangeNotification)

Answer 1

This is what I use to rotate a button's image when the view rotate:
- (BOOL)shouldAutorotate {
return NO;
}
- (NSUInteger)supportedInterfaceOrientations {
return UIInterfaceOrientationMaskLandscape;
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(handleDeviceOrientationDidChangeNot:) name:UIDeviceOrientationDidChangeNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
}
- (void)handleDeviceOrientationDidChangeNot:(NSNotification *)not {
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
CGFloat angle = 0.0;
switch (orientation) {
case UIDeviceOrientationPortrait:
angle = 0.0;
break;
case UIDeviceOrientationLandscapeLeft:
angle = M_PI/2;
break;
case UIDeviceOrientationPortraitUpsideDown:
angle = M_PI;
break;
case UIDeviceOrientationLandscapeRight:
angle = -M_PI/2;
break;
default:
return;
break;
}
[UIView animateWithDuration:0.35 animations:^{
self.someButton.imageView.transform = CGAffineTransformMakeRotation(angle);
} completion:^(BOOL finished) {
//
}];
}