Question

I’m pushing a ViewController when the iPhone changes orientation to landscape and I’m having trouble with changing the orientation of the ViewController.

I used that code:

    - (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
Storage *strg = [Storage sharedStorage];

if ([strg.orient intValue] == 2) 
{
    [[UIApplication sharedApplication] setStatusBarOrientation:
     UIInterfaceOrientationLandscapeRight];

    UIScreen *screen = [UIScreen mainScreen];
    CGFloat screenWidth = screen.bounds.size.width;
    CGFloat screenHeight = screen.bounds.size.height;
    UIView *navView = [[self navigationController] view];
    navView.bounds = CGRectMake(0, 0, screenHeight, screenWidth);
    navView.transform = CGAffineTransformIdentity;
    navView.transform = CGAffineTransformMakeRotation(1.57079633);
    navView.center = CGPointMake(screenWidth/2.0, screenHeight/2.0);
    [UIView commitAnimations];
}
if ([strg.orient intValue] == 1)
{
    [[UIApplication sharedApplication] setStatusBarOrientation:
     UIInterfaceOrientationLandscapeLeft];

    UIScreen *screen = [UIScreen mainScreen];
    CGFloat screenWidth = screen.bounds.size.width;
    CGFloat screenHeight = screen.bounds.size.height;
    UIView *navView = [[self navigationController] view];
    navView.bounds = CGRectMake(0, 0, screenHeight, screenWidth);
    navView.transform = CGAffineTransformIdentity;
    navView.transform = CGAffineTransformMakeRotation(4.71238898);
    navView.center = CGPointMake(screenWidth/2.0, screenHeight/2.0);
    [UIView commitAnimations];
}
}

The result is not consistent; sometimes it goes into the right orientation and sometimes it’s upside-down.

When I go from LandcapeRight to LandscapeLeft strait away (and vise versa) it works fine, the problem is only when I go to portrait mode.

Any ideas what I’m doing wrong?

Answer 1

If you really are responding to device orientation change they you probably shouldn’t be using setStatusBarOrientation. I think you’d be better off making your viewcontrollers rotate to the supported orientations using shouldAutorotateToInterfaceOrientation and deviceDidRotateSelector notifications.

[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(deviceDidRotateSelector:) name: UIDeviceOrientationDidChangeNotification object: nil];

-(void)deviceDidRotateSelector:(NSNotification*) notification {
// respond to rotation here
}


- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
//Return YES for supported orientations
return YES;
}