CODEWITHSUNDEEP
iphoneiosnotificationsorientationrotation
robscure
robscure

Reputation: 901

iOS orientation change not working also UIDeviceOrientationDidChangeNotification not received

I am quite new to iOS and I am trying desperately to get orientation changes working in my app. After researching here's what I do:

In my app I have a NavigationController managing seven UIViewController subclasses.

In the projects summary tab I activated all 4 device orientations.

Each UIViewcontroller subclass has a xib file, all xib files have "autoresize subviews" activated.

The UIViewController subclasses all have: 

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait || 
            interfaceOrientation == UIInterfaceOrientationLandscapeLeft ||
            interfaceOrientation == UIInterfaceOrientationLandscapeRight );
}

they also all have: 

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation

and:

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration

implemented with an NSLog(...) statements (never printed, debugger also never entering these methods).

Also I was trying to use:

    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

BOOL getOrientationUpdates = [[UIDevice currentDevice] isGeneratingDeviceOrientationNotifications];
NSLog(@"will receive orientation notifications: %@", getOrientationUpdates?@"YES":@"NO");

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

with

-(void)orientationChanged: (NSNotification*) notification { NSLog(@"orientationChanged"); }

and

[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications]; [[NSNotificationCenter defaultCenter] removeObserver:self]; respectively.

when I do beginGeneratingDeviceOrientationNotifications etc. in the AppDelegate's - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions method, orientationChanged: is called once on startup but never again however I rotate the device, when I do it in one of the UIViewController subclasses it is never called!

So far, all I want to achieve is getting orientation notifications to rotate an UIImageView and UIImage (without any layout changes in the different orientations).

UIDeviceOrientation o = [UIDevice currentDevice].orientation;

always returns UIDeviceOrientationPortrait

It might be that I missed something in the docs or on stackoverflow, but I obviously cannot figure out what I need to do/add to get it working in my setup. also I am quite new to stackoverflow, so I hope my post is not violating any platform conventions.

Any help/hints are greatly appreciated. Thank you so much!

EDIT: getOrientationUpdates is always YES, which appears strange to me as the notification callback selector is never called when I rotate it!

EDIT: in my AppDelegate's didFinishLaunchingWithOptions I am doing:

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.regScreenController = [[RegistrationScreenController alloc] initWithNibName:@"RegistrationScreenController" bundle:nil];

navCtrl = [[UINavigationController alloc]initWithRootViewController:self.regScreenController];

[navCtrl setNavigationBarHidden:YES];
self.window.rootViewController = self.regScreenController;
[self.window addSubview:navCtrl.view];
[self.window makeKeyAndVisible];
return YES;

Upvotes: 4

Views: 3265

Answers (1)

graver
graver

Reputation: 15213

See if you are setting the self.window.rootViewController in your AppDelegate's didFinishLaunchingWithOptions: method, because if you're adding only subviews to the window the orientation change notification does not fire.

Upvotes: 5

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