Swipe touch handling intermittently broken during/after screen zoom

Originator:atlantiasoftware
Number:rdar://27685038 Date Originated:03-Aug-2016 04:50 PM
Status:Open Resolved:
Product:iOS Product Version:10 beta 4
Classification:Serious Bug Reproducible:Always
 
Summary:
During and after enabling accessibility screen zoom, single finger swiping in scroll areas is broken. Sometimes it takes three or four swipes to actually have the gesture recognized (see attached video). This only seems to happen during and after zoom has been enabled via three-finger double-tap, on a device that has been freshly hard restarted, problem is not present. 

Steps to Reproduce:
1. Turn on Zoom (Settings>General>Accessibility>Zoom)
2. Double tap with three fingers to active zoom.
- Observe the performing a single finger swipe in a scroll view such as a table view does not register touches on many occasions. 
3. Deactivate zoom by double tapping with three fingers again.
- Observe that the intermittent touch handling issue is now still present. 

Expected Results:
Touches should always be handled. 

Actual Results:
See observations and video. 

Regression:
Has been present on all iOS 10 beta releases thus far (1, 2, 3, 4)

Comments


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