Open Radar

 
Summary:
When UIImagePickerController is used to take a photo using the camera, it resets [UIApplication idleTimerEnabled] to YES, even if the app had set it to NO before.

This causes the screen to auto-lock when that behavior is not what the developer intended. At best, this is annoying to the user; at worst, it's a serious safety hazard (e.g. for navigation apps).

Steps to Reproduce:
1. Launch attached sample project.
2. Tap "Take Photo" and take a photo.

Expected Results:
The label shows "Idle timer disabled", since that is what the app had set it to.

Actual Results:
The label shows "Idle timer enabled", which is not what the app had set it to.

Version:
iOS 9.3.5, iOS 10.1.1

Notes:
Stack trace where it's reset:
#7	0x000000018a8490bc in -[CMKCaptureController _resetIdleTimer] ()
#8	0x000000018a844aa8 in -[CMKCaptureController stopPreview] ()
#9	0x000000018a7f987c in -[CMKCameraView viewWillBeRemoved] ()
#10	0x000000018a834954 in -[CMKCameraViewController viewWillDisappear:] ()
#11	0x000000018c4f488c in -[PLUICameraViewController viewWillDisappear:] ()
#12	0x0000000186801434 in -[UIViewController _setViewAppearState:isAnimating:] ()
#13	0x0000000186879024 in -[UIViewController __viewWillDisappear:] ()
#14	0x00000001868c5100 in -[UINavigationController viewWillDisappear:] ()
#15	0x0000000186a68330 in -[UIImagePickerController viewWillDisappear:] ()
#16	0x0000000186801434 in -[UIViewController _setViewAppearState:isAnimating:] ()
#17	0x0000000186879024 in -[UIViewController __viewWillDisappear:] ()
#18	0x0000000186b4827c in __56-[UIPresentationController runTransitionForCurrentState]_block_invoke ()
#19	0x0000000186a9b0c8 in _runAfterCACommitDeferredBlocks ()


Configuration:
iPhone 6

Attachments:
'ImagePickerSample.zip' was successfully uploaded.