Discrepancy of Size Class for 2/3 Split Portrait View iPad Pro 12.9

Originator:huapapojt
Number:rdar://34621309 Date Originated:09/23/2017
Status:Open Resolved:
Product:iOS + SDK, UIKit Product Version:11.0
Classification:Serious Bug Reproducible:Always
 
Summary:
There is an important design discrepancy in how Size Class is enforced for 2/3 Split Portrait View on iPad Pro 12.9.

Apple's official doc indicates that 2/3 Split Portrait View for iPad Pro 12.9 gets Regular Width (I don't think it makes sense, since ratio-wise it should be Compact, but ok.)

Xcode's interface builder also enforces the same thing. Screenshot attached.

However, `traitCollectionDidChange` informs me that 2/3 Split Portrait View has **Compact** Width. Screenshot attached, and a sample Xcode project attached.

Please address this issue.

Steps to Reproduce:
1. Run attached Xcode project on an iPad Pro 12.9 simulator in Portrait Mode
2. Put the app in 2/3 Split View.
3. See the logging message.

Expected Results:
Same horizontal size class as in the official doc and in IB expected.

Actual Results:
`traitCollectionDidChange` returns inconsistent horizontal Size Class.

Version/Build:
Xcode 9 with iOS 11 SDK

Configuration:
MBP mid 2014. See attachment.

Comments

The official doc

The official doc: https://developer.apple.com/ios/human-interface-guidelines/visual-design/adaptivity-and-layout/

By huapapojt at Sept. 25, 2017, 6:51 a.m. (reply...)

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