dojox/mobile: on iOS6, some apps sometimes don't resize as expected when changing the device orientation

[Adrian Vasiliu]

At least with an app using dojox/mobile/ScreenSizeAware and dojox/mobile/FixedSplitter, when running on iOS 6 devices (iPad and iPhone), the app sometimes doesn't resize itself as expected after changing the device orientation.

How to reproduce:

1. Load

​http://download.dojotoolkit.org/release-1.8.2/dojo-release-1.8.2/dojox/mobile/tests/test_ScreenSizeAware-prop.html on an iOS 6 device (reproduced on iPad 4 iOS 6.0.1 and iPhone 4S iOS 6.0.1).

2. Change the orientation of the device a number of times

=> After some number of orientation changes (sometimes after 15-20 turns, sometimes earlier), the app doesn't resize itself to adjust to the device orientation.

Workaround: Turn the device again (back and forth).

Remarks:

• Also holds for Dojo 1.8.1, but not for 1.8.0.
• Apparently it is a side-effect with the iOS6-specific changes in dojox/mobile/common (disabling these fixes the issue).
• It doesn't seem related with how fast you turn the device (I also reproduced while turning slowly).
• Did not reproduce on iPad 2 iOS 5.1.
• Unclear whether it specific to the ScreenSizeAware / FixedSplitter used in this test. With a few other samples I did not reproduce (yet?) a similar issue.

The issue has been raised in ​http://dojo-toolkit.33424.n3.nabble.com/First-orientation-not-detected-in-dojox-mobile-tt3992117.html

[Adrian Vasiliu]

After further tests, it seems the issue is specific to dojox/mobile/ScreenSizeAware. The iOS6-specific changes in dojox/mobile/common (full-screen support) apparently make it hurt more often, but I also reproduced on iPhone 4S iOS 6.0.1 with the same test in Dojo 1.8.0 (​http://download.dojotoolkit.org/release-1.8.0/dojo-release-1.8.0/dojox/mobile/tests/test_ScreenSizeAware-prop.html ), that is before the changes for full-screen support.

On the other side, I did NOT reproduce (after many attempts) with a test using FixedSplitter but NOT using ScreenSizeAware: ​http://download.dojotoolkit.org/release-1.8.2/dojo-release-1.8.2/dojox/mobile/tests/test_FixedSplitter-H2.html .

Hence, I suggest rephrasing the title of the ticket as follows: dojox/mobile: on iOS6, some apps using dojox/mobile/ScreenSizeAware sometimes don't resize as expected when changing the device orientation

ScreenSizeAware being marked experimental, and unless the issue will be reproduced without ScreenSizeAware, I would think the severity of this issue is low. Of course, this doesn't mean it doesn't deserve to be fixed, it is just an estimate of the impact.

[Adrian Vasiliu]

This issue appears to go away thanks to the new ios6 full-screen support introduced in #16658. So this ticket can be closed when #16658 will be closed.