UIAttachmentBehavior not affected by frictionTorque or damping

Originator:thedov
Number:rdar://23596425 Date Originated:18-Nov-2015 01:56 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode 7.1.1 (7B1005)
Classification:Serious Bug Reproducible:Always
 
Summary:
When configuring a UIView with a UIAttachmentBehavior, there appears to be no way to change the rate at which the swing decelerates. Setting the frictionTorque and damping properties on the attachment behavior has no effect.

Steps to Reproduce:
1. Build and run the attached sample project in the simulator
2. Observe how the blue box swings
3. Tap Add Friction
4. Tap Add Damping

Expected Results:
Steps 3 and 4 each slow down the swinging (or deceleration of) of the blue box

Actual Results:
The blue box swings at the same rate (and slows down at the same rate) regardless of whether the damping and frictionTorque are 0 or 1,000,000

Comments


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