Window has weird frame and offset after rotation on iOS 8 - ios

Question

On iOS 8, when launching the app in landscape mode, I get weird values for the key window's frame after a rotation:
// Before rotation (landscape)
{{0, 0}, {768, 1024}}
// After rotation (portrait)
{{-256, 0}, {1024, 768}}
Code:
NSLog(#"%#", NSStringFromCGRect(UIApplication.sharedApplication.keyWindow.frame));
Where does the X offset come from, and why are the frame values inverted (should be width=768 in landscape mode)?

Answer 1

I was having this problem and fixed it by using the fixedCoordinateSpace.bounds. Heres a quick example.
Observe status bar changes in the window.
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(statusBarFrameOrOrientationDidChanged) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(statusBarFrameOrOrientationDidChanged) name:UIApplicationDidChangeStatusBarFrameNotification object:nil];
}
return self;
}
Than rotate the window and resize the windows frame.
- (void)statusBarFrameOrOrientationDidChanged {
CGRect rect = ({
CGRect rect;
if ([[[UIDevice currentDevice] systemVersion] intValue] <= 7) {
rect = [UIScreen mainScreen].bounds;
} else {
id<UICoordinateSpace> fixedCoordinateSpace = [UIScreen mainScreen].fixedCoordinateSpace;
rect = fixedCoordinateSpace.bounds;
}
rect;
});
CGAffineTransform transform = CGAffineTransformMakeRotation(({
CGFloat angle;
switch ([UIApplication sharedApplication].statusBarOrientation) {
case UIInterfaceOrientationPortraitUpsideDown:
angle = M_PI;
break;
case UIInterfaceOrientationLandscapeLeft:
angle = -M_PI_2;
break;
case UIInterfaceOrientationLandscapeRight:
angle = M_PI_2;
break;
default:
angle = 0.0f;
break;
}
angle;
}));
if (!CGAffineTransformEqualToTransform(self.transform, transform)) {
self.transform = transform;
}
if (!CGRectEqualToRect(self.frame, rect)) {
self.frame = rect;
}
}