iPhone 6 orientation transform issue - UIWindow object

Question

I found the issue while trying to update our project to adapt the change in iOS8 and iPhone6. After a series of testing and debugging, I do not know the reason that causes this issue. Only clue I found is that when creating UIWindow object in iPhone6, landscape, the UIWindow object has different angle (orientation) than the main screen (status bar angle). And after trying to transform the UIWindow object, it actually goes to a weird size. I do not know why and how this is happening. Your help is highly appreciated!!

[Environment]
Xcode 6.0.1 build 6A317
simulator: iPhone 6, iPhone 6+

[Issue]
There’s weird behavior occurred when trying to resize the UIWindow object to full screen (frame = [UIScreen mainScreen].bounds )

[Normal Behavior] (OK)
1. Create UIWindow object in portrait orientation
2. Turn the device to landscape
3. UIWindow object will be resized to full screen
4. Resize OK

[Abnormal behavior] (FAIL)
1. Create UIWindow object in landscape orientation
2. UIWindow object size correct, but orientation is wrong
3. After trying to transform to correct angle(orientation), the frame origin/size is messed up

[Test Result]
Testing simulator: iPhone 4s, iPhone 5, iPhone 5s, iPhone 6, iPhone 6+
Environment: Xcode 6.0.1, build 6A317, iOS8 simulator

Screenshots link

Answer 1

I have exactly the same issue after I upgrade my project to the new SDK and new device.

Just by adding an empty storyborad as launch screen in the project setting fixed this issue for me:

Answer 2

Had the same problem. Turns out I was calling initWithFrame on UIWindow with CGRect in pixels instead of points.