UINavigationBar's barTintColor doesn't animate during animateAlongsideTransition.

Originator:coultonvento
Number:rdar://26893274 Date Originated:6/20/2016
Status: Resolved:
Product:iOS SDK Product Version:
Classification: Reproducible:Always
 
Area:
UIKit

Summary:
The barTintColor property on UINavigationBar is not properly animating between transitions when using animateAlongsideTransition.

Steps to Reproduce:
1. Setup an app that consists of one navigation controller.
2. In the animation block of `animateAlongsideTransition:completion:`, set the UINavigationBar's barTintColor to a different color. This should animate.
3. Build/run
4. Now push and pop view controllers. Notice the results.

Expected Results:
The UINavigationBar's barTintColor should animate the same way tintColor does.

Actual Results:
When popping and pushing view controllers, the UINavigationBar's barTintColor is not animating (tintColor is, however). It's being set at the very end of the transition.

Version:
iOS 9.3 (iPhone 6S, 6S+)

Notes:
I've only noticed this behavior on an iPhone 6, 6S, and 6S+ (all running iOS 9.3). This problem does not exist in the associated iOS 9.3 simulators. 

As of 6/20/16, the iOS 10 simulators exhibit the same behavior (not animating the transition in animateAlongsideTransition).

Configuration:
iPhone 6, iPhone 6S, iPhone 6S+

Attachments:
'UINavigationBar tinting test.zip' was successfully uploaded.

Comments

I am also seeing this using UIView animateWithDuration: animations:.

By sllynn8907 at Aug. 13, 2016, 8 p.m. (reply...)

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