Open Radar

 
Summary:
When interactively dismissing keyboard on UIScrollView with UIScrollViewKeyboardDismissModeInteractive on, the content jump before smoothly bouncing back to it's place.

Steps to Reproduce:
1. Open the attached iOS demo project
2. Create a new item
3. Tap the item to show the detail view
4. Click on the textview
5. Drag the keyboard down and let it go to dismiss it

Expected Results:
The content of the scroll view should smoothly bounce back to it’s original position, like in Messages and Mail.

Actual Results:
The content quickly jumps (to the top it seems) before it bounces back to it’s original position.

Notes:

I added a link[4] to a demo project based on the master-detail iOS template that reproduces the bug in DetailViewController.swift in about 25 lines. The method used to adjust the scrollview to the shown/hidden keyboard is what is shown in the IOS Developer Libraries “Managing the Keyboard”[1] in listing 5-1, so it should be sound enough.

I have also linked[2] to a video where you can see the bug in action, and the DetailViewController.swift[3] itself for your viewing pleasure.

[1]: https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html
[2]: http://cl.ly/3g3h2i2c0b3w
[3]: http://cl.ly/1E3N2a340z0J
[4]: http://cl.ly/06001T3B2X2b