iPhone 5, iPod touch 5 touchscreens responding oddly to multiple, rapid diagonal swipes

The iPhone 5 appears to be exhibiting odd touch behavior when it comes to consistent detection of multiple swipe events over time. On an iPhone 4S, you can begin rapidly swiping back and forth and iOS will easily keep pace, scrolling the view to match your mad swiping, even as you start angling towards the diagonal. On an iPhone 5, however, while vertical scrolling remains fine, rapid diagonal scrolling (approaching 45 degrees) will drop off, as though iOS simply tires of detecting the gestures. The issue was first reported by CMA Megacorp on Twitter, noting:

Slide finger back and forth diagonally on screen, input events drop out or stop altogether.

I was able to reproduce the behavior on an iPhone 5 with Mail.app, Contacts.app, and Tweetbot (though a couple of times in Tweetbot rapid diagonal swiping worked fine for without any drop off), Brushes (paint strokes stopped appearing), the iMore app, and more. I was also able to reproduce the same behavior on an iPod touch 5 using the same apps. Various devices were running iOS 6, iOS 6.0.1, and iOS 6.1 beta. That means it's not restricted to one control, like UITableView, or one version of iOS 6.

I was not able to reproduce the behavior at all on an iPhone 4S or iPad 4. That may indicate the issue is unique to Apple's new 4-inch, 16:9 in-cell display devices and/or the software driving them.

Due to the angle, rapidity, and consistency needed to trigger the drop, it's not a problem most apps or developers will ever face. Games and game developers on the other hand, could well encounter it.

Recombu produced the following video highlighting the behavior.

Source: @CMA_Megacorp via Recombu

Rene Ritchie
Contributor

Rene Ritchie is one of the most respected Apple analysts in the business, reaching a combined audience of over 40 million readers a month. His YouTube channel, Vector, has over 90 thousand subscribers and 14 million views and his podcasts, including Debug, have been downloaded over 20 million times. He also regularly co-hosts MacBreak Weekly for the TWiT network and co-hosted CES Live! and Talk Mobile. Based in Montreal, Rene is a former director of product marketing, web developer, and graphic designer. He's authored several books and appeared on numerous television and radio segments to discuss Apple and the technology industry. When not working, he likes to cook, grapple, and spend time with his friends and family.

Latest in iPhone 5
Apple iPhone 5s
Someone winning a photography award with an iPhone 5s shows you don't need the latest and greatest to take great shots
iPhone 5 camera
Scientists are building microscopes out of old iPhone 5 cameras and LEGO
iPhone 5c lineup
The iPhone 5c is now officially a vintage Apple product
iPhone 5c lineup
Leaked internal memo reveals iPhone 5c will become vintage on October 31
Update your iPhone 5 to iOS 10.3.4 before November 3 or else...
How to fix a broken charge port on an iPhone 5
Latest in News
iMore Logo
One more thing… Goodbye from iMore
Jony Ive
Jony Ive’s OpenAI hardware device could be his next world-changing design
NEBULA Cosmos 4K SE with Apple TV
This new 4K projector is tempting me to replace my LG C2 TV, just so I can watch Slow Horses on a 200-inch display
VisionOS 2 app reorganization
visionOS 2 is the first major software update for Apple Vision Pro, and now it's available
macOS Sequoia
macOS Sequoia (version 15) is now available for your Mac with some big upgrades
watchOS 11
watchOS 11 is now rolling out to all Apple Watch users with the Series 6 or newer