UIPageViewController glitch with changing gestures

Originator:ward
Number:rdar://10821808 Date Originated:07-Feb-2012 03:14 PM
Status:Open Resolved:
Product:iPad SDK Product Version:5.0.1
Classification:Other Bug Reproducible:Always
 
Summary:

UIPageViewController freezes a page in place when a page-turn swipe gesture is transitioned into a four-finger swipe up gesture, and does not reset cleanly.

Steps to Reproduce:

1) Create a new Cocoa touch "Page-Based Application" in Xcode 4.2.1
2) Without modifying anything, launch the template app on a device
3) slowly begin to turn a page
4) While holding the page in place, use additional fingers to perform a multi-finger swipe up to present the recently-used-apps tray/dock.

Expected Results:

The page-turn is cancelled, and the page animates cleanly back to the neutral/flat state (as seen if you repeat the above steps in iBooks.app)

Actual Results:

The page-turn freezes in place until it is manually reset after the app resumes the active state.

Regression:

Unknown.

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