UIView in front of everything not rotating with screen? - objective-c

Question

I have this code:
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
imageView.image = [UIImage imageNamed:#"image.png"];
UIApplication *app = [UIApplication sharedApplication];
[app addSubViewOnFrontWindow:imageView];
...
- (void)addSubViewOnFrontWindow:(UIView *)view {
int count = [self.windows count];
UIWindow *w = [self.windows objectAtIndex:count - 1];
[w addSubview:view];
}
The problem is, when the app rotates, the view on the front doesn't rotate. It just stays in portrait.
How can I get this to rotate normally with the rest of the device?

Answer 1

I haven't tried this, but UIWindow has a property rootViewController
The root view controller for the window.
#property(nonatomic, retain) UIViewController *rootViewController
Discussion
The root view controller provides the content view of the
window. Assigning a view controller to this property (either
programmatically or using Interface Builder) installs the view
controller’s view as the content view of the window. If the window has
an existing view hierarchy, the old views are removed before the new
ones are installed.
The default value of this property is nil.
Availability
Available in iOS 4.0 and later.
Declared In
UIWindow.h
As you should be providing this root view controller you should be able to add it to the rootViewContoller's view, and handle aout rotation correctly.
another solution could be, that you swap the windo with a custom one while presenting your view, with another view controller. this trick in action you can see in the implementation of TSAlertView.
- (void) show
{
[[NSRunLoop currentRunLoop] runMode: NSDefaultRunLoopMode beforeDate:[NSDate date]];
TSAlertViewController* avc = [[[TSAlertViewController alloc] init] autorelease];
avc.view.backgroundColor = [UIColor clearColor];
// $important - the window is released only when the user clicks an alert view button
TSAlertOverlayWindow* ow = [[TSAlertOverlayWindow alloc] initWithFrame: [UIScreen mainScreen].bounds];
ow.alpha = 0.0;
ow.backgroundColor = [UIColor clearColor];
ow.rootViewController = avc;
[ow makeKeyAndVisible];
// fade in the window
[UIView animateWithDuration: 0.2 animations: ^{
ow.alpha = 1;
}];
// add and pulse the alertview
// add the alertview
[avc.view addSubview: self];
[self sizeToFit];
self.center = CGPointMake( CGRectGetMidX( avc.view.bounds ), CGRectGetMidY( avc.view.bounds ) );;
self.frame = CGRectIntegral( self.frame );
[self pulse];
if ( self.style == TSAlertViewStyleInput )
{
[self layoutSubviews];
[self.inputTextField becomeFirstResponder];
}
}
with
#interface TSAlertOverlayWindow : UIWindow
{
}
#property (nonatomic,retain) UIWindow* oldKeyWindow;
#end
#implementation TSAlertOverlayWindow
#synthesize oldKeyWindow;
- (void) makeKeyAndVisible
{
self.oldKeyWindow = [[UIApplication sharedApplication] keyWindow];
self.windowLevel = UIWindowLevelAlert;
[super makeKeyAndVisible];
}
- (void) resignKeyWindow
{
[super resignKeyWindow];
[self.oldKeyWindow makeKeyWindow];
}
//
#end

Answer 2

add a new window, with new rootviewController, and subscribe it to
[[NSNotificationCenter defaultCenter] addObserver:(id) selector:(SEL) name:UIDeviceOrientationDidChangeNotification object:nil];

Answer 3

Windows don't autorotate. Ever. You should be adding this imageView to a UIViewController's view as the UIViewController has built in autorotation.
If you want to use a UIWindow to hold all your views, you will need to write your own transform code to handle rotations.