Quick Help no longer shows documentation from imported module

Number:rdar://34789767 Date Originated:3 Oct 2017
Status:Open Resolved:
Product:Xcode Product Version:9.0 (9A235)
Classification:Serious Bug Reproducible:Always

Documentation comments for a Swift class are displayed only within Swift code. Neither in same module, nor in an importing ObjC-class Quick Help works. The generated ObjC Header
has the documentation comments present.

Steps to Reproduce

Open the ObjcCViewController.m or the sample app with Xcode 9
Open+Click on publicProperty
Expected Results

You should see “This is a public property” displayed in Quick Help
Actual Results

You only see “No Quick Help”
If you instead do the same in the SwiftViewController you see Quick Help as expected.

Version 9.0 (9A235)


iMac or MacBook, with Xcode 9 and macOS 10.13

The mentioned sample is on my Radar Samples GitHub repo (https://github.com/Cocoanetics/RadarSamples), titled InterfaceTest.


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